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Magnesium vs aluminum, or why a Samsung Galaxy S7 made of magnesium would be awesome

CAD render depicting what the Galaxy S7 might look like. Via @OnLeaks

CAD render depicting what the Galaxy S7 might look like. Via @OnLeaks


It is that time of the year again – a time of leaks, speculation, estimates, and plain guessing as to what the next big Samsung Galaxy model will bring to the table. And with rumors revolving around a January announcement for the Samsung Galaxy S7, the rumor mill is already running at full steam. How big is the phone going to be? Will it have radically better specs? What is it going to be made of? Will it be capable of shooting laser beams and projecting holograms in mid-air? These are the questions on the minds of many – questions that our rich collection of Samsung Galaxy S7 rumors attempts to answer.

Among the plethora of Galaxy S7 rumors that have accumulated is one suggesting that Samsung's next flagship will be slightly different in terms of design. The new model will be built of glass and metal, just like the Galaxy S6. But instead of aluminum, a magnesium alloy will be used for the handset's exterior frame. The material will likely be found inside the device as well, as part of its internal structure. This, if true, would be pretty awesome for a number of reasons, which we're about to highlight in the paragraphs below.

What is magnesium, anyway?


Magnesium vs aluminum, or why a Samsung Galaxy S7 made of magnesium would be awesome
Magnesium (pictured to the right) is an alkaline earth metal with an atomic number 12. It is a shiny grey solid with numerous applications, primarily in cases where a light, strong material is required. On its own, however, magnesium isn't exactly ideal for use in consumer products as it is very reactive. We don't want our gadgets to corrode easily or to combust spontaneously, do we? This is why magnesium is mixed with other elements, including aluminum or zinc, to create various alloys, which are a lot more practical. For instance, the chassis of some premium laptops, digital cameras, and even some cell phones are made of magnesium alloy. So are components inside airplanes, rockets, high-performance cars, and other machines where weight reduction is of importance. 

What makes magnesium alloys better than aluminum ones?


Magnesium alloys are about 33% lighter, yet just as strong and easier to machine

Several are the differences that set magnesium alloys apart from aluminum ones. Firstly, there's the lighter weight of the former. The frame of the Galaxy S6, for instance, is made of 6013-grade aluminum alloy, which has a density of 2.71 g/cm³ (0.0979 lb/in³). The density of the 7000-series aluminum used in the iPhone 6s is even greater. In comparison, magnesium alloys have densities of about 1.8 g/cm³ (0.065 lb/in³). What these confusing numbers indicate is that magnesium alloys are about 33% lighter than aluminum ones, which greatly affects the total weight of the product they're used in. Most of us wouldn't mind a lighter Galaxy S7, right? 

Despite being lighter, magnesium alloys are similar to (if not better than) aluminum ones in terms of mechanical characteristics. They can be just as strong and durable. They are also good at dissipating heat. They dampen vibrations and shock really well. They have a lesser impact on the transmission of radio waves. In addition to all this, it is easier to make structural elements, such as a phone's body or chassis, out of magnesium alloys due to the material's favorable mechanical properties and lower melting point. 

If magnesium alloys are so awesome, where have they been all along?


Historically, aluminum was quicker to gain popularity – as a metal great for making anything from soda cans to car engines. It was light, durable, recyclable, and improvements in technology made it cheap to obtain. The adoption of magnesium for commercial applications began much later, but the popularity of the material is on the rise as its cost-efficiency is nearing that of aluminum. On one hand, raw magnesium is still more expensive than aluminum, but being easier to machine makes its alloys about as cost-effective as aluminum ones. 

The Samsung NX1 camera has a body made of magnesium alloy

The Samsung NX1 camera has a body made of magnesium alloy


That magnesium Samsung Galaxy S7 is going to be sweet!


Not so fast, cowboy! A rumor is just a rumor and should be treated as such, especially when we have no physical evidence to support it. Nevertheless, the odds of seeing a Galaxy S7 made of magnesium alloy aren't slim at all. The material is far from exotic, can be produced in large quantities, and its advantages over aluminum would give the next Galaxy flagship one more thing to stand out with. Besides, it's not like we haven't seen magnesium-made gadgets already – the Microsoft Surface tablets, the OnePlus 2, and the Oppo R1 all have bodies made of magnesium alloy. Samsung is no stranger to the material either, as its NX1 digital camera boasts a sturdy magnesium body. All that said, a magnesium-made Samsung Galaxy S7 will not come as a surprise, seeing that its makes sense as the next step in the Galaxy line-up's design evolution. What such a phone might look like is depicted in the unofficial renders and leaked images below.


References:

Wikipedia.com - Magnesium, Aluminum
Dynacast.com - Magnesium die casting
Encyclopedia.com - Aluminum alloys
Meridian-mag.com - Magnesium die casting

55 Comments
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posted on 23 Dec 2015, 03:33 4

1. AnTuTu (Posts: 1578; Member since: 14 Oct 2012)


While magnesium would be awesome in S7 but I don't wanna see this design. Sammy need to come up with a better design.

posted on 23 Dec 2015, 06:21 33

14. vincelongman (Posts: 4150; Member since: 10 Feb 2013)


BTW why does PA keep ignoring the fact that the Note 5's frame is 7000-series aluminum?
Makes more sense to bring up the Note 5 since that's Samsung's most recent flagship
But PA loves bring up Apple, so of course the 6S is brought up

posted on 23 Dec 2015, 11:25 3

36. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


The S6 Edge+ also uses 7000 series aluminum. Which Samsung was smart enough to use considering they decided to make the S6 Edge larger and they didnt need a bending phone to make that move either.

I also said the same in my post as I didnt see yours. There was no need to mention Apple since Samsung also has not one, but two phones using 7000 series aluminum at the leats.

The continuous need to pit these against each other when you don't even have too is simply lazy ass article writing. PA wonders why they get bashed and why fanbois in general get bashed?

Because just like a sheep or ants (your choice), they all follow the one in front even if that first falls off a cliff, you all are so stupid as you will do exactly the same.

posted on 23 Dec 2015, 11:46 4

39. Hexa-core (banned) (Posts: 2131; Member since: 11 Aug 2015)


And... when PA gets bashed for thier practices, they send us warnings and limit/ban anyhow!

I'm sick of it.

posted on 28 Dec 2015, 09:43

61. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


Knock on wood. I haven't had that happen. Try to provide good arguments when you bash them.

That way you are bashing with substance. lol

posted on 01 Jan 2016, 18:40

70. MarinoVladimir (Posts: 41; Member since: 04 Aug 2014)


I'll sound funny, but what is PA? lol

posted on 05 Jan 2016, 10:26 1

71. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


PhoneArena.

posted on 07 Jan 2016, 11:58

72. MarinoVladimir (Posts: 41; Member since: 04 Aug 2014)


ohmaygad, how dumb of me!
It obviously makes sense, though I thought it was something outta this site.
Thanks. haha

posted on 23 Dec 2015, 07:13

18. willywanta (Posts: 216; Member since: 04 Jun 2014)


It is their signature design, just like apple with their iPhones.

posted on 27 Dec 2015, 15:29

60. stilwelloklahoma (Posts: 34; Member since: 05 Sep 2015)


s7 should take good care for their heating problem , other than that , everything is good

posted on 23 Dec 2015, 11:23

35. QWERTYphone (Posts: 654; Member since: 22 Sep 2014)


NO REMOVABLE BATTERY = FAIL
GLASS CONSTRUCTION = FAIL
I want to buy a S7.
Fix these.

posted on 23 Dec 2015, 11:27 6

37. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


I'm curious. The iPhone's don't have those either, so
since the iPhone has

NO REMOVABLE BATTERY AND THEY HAD MODELS WITH GLASS CONSTRUCTION...were those FAILS too? Or are you the typical trolling fanboi hypocrite?

Because the phones use such materials, you are going to slap a case on it anyways. Removable batteries in my opinion for a device where a charge can last 12 hours is simply stupid. If you cant get to a charger within 12 hours in a day, then you have a personal serious problem.

You sound liek a complete fool repeating the same retard ass BS in every Samsung S6/S7/Note5 article.

posted on 23 Dec 2015, 12:07 3

44. Commentator (Posts: 3669; Member since: 16 Aug 2011)


Why do you assume he's pro-iPhone? Why did you even bring the iPhone up in your comment? Why didn't you mention the OnePlus X or Sony Xperia line or Nexus line or any other device that uses/has used glass construction and sealed battery?

You just criticized PA for unnecessarily bringing the iPhone into the discussion (post 36) yet you did the very same in this comment. Are YOU they typical trolling fanboi hypocrite?

posted on 28 Dec 2015, 09:53

62. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


I am not assuming he is pro iPhone. I brought up the iPhone because it is the most popular next to the Gal;axy S. So since both dont offer these features, then are they equally both fails?

Yes the difference here is Samsung did once offer those.
But then again, the Samsung fanbois say they were tired or plastic devices and wanted better materials.

Even though you can make a metal phone with a door for a removable battery, it hampers the deign. For one the door has to be made waterproof which costs extra money. Thus unibody is better for a design.

SDCARD were removed due to incompatibility with the controller on the highspeed ontroller needed for the new Flash to provide undirectional data throughput vs uni-directional as the older eMMC controller offers.

Samsung can easiy add a door in the side of a metal frame for a sd-card. It can be done similar to the SIM tray.

But the constant need to beat a dead horse? Dude, he posted this crap easily more than 1000 times in the past year. Every since the S6 and Note 5 were leaked having this stuff removed, he's been chanting this crap.

Lots of phones have sealed batteries. They sill make ones that dont. if you desire or need a phone that has removable batteries, every single phone OEM with exception of Apple has at least one.

To constant,y post how a phone you liek doesnt have it for good reasons over and over is stupid. Either buy another phone and STFU...or just STFU. It's stupid.

Even without those features, the phone still sold more than they did over last year. So it isnt a fail. What is failed is his ability to just..."let it go, let it go".

posted on 23 Dec 2015, 12:28 2

45. Hexa-core (banned) (Posts: 2131; Member since: 11 Aug 2015)


"If you cant get to a charger within 12 hours a day, then you have a personal serious problem"

Techie! That phrase of yours is 100% subjective!

Imagine being on tourism where there's no power supply... if I can't get to charge my phone within 12 or even 24hrs, what serious problem do I have?
Removable battery helps alot, because I could prepare even 10 batteries for my phone, hence go from 1% to 100% by replacing the dead battery for a fresh one in less than 15 seconds, (unlike quick charge) and keep on shooting pics/videos.

If you can live without removable battery, then that's your usage!
But you do not have to bash someone who can't live without it!
Your usage or convenience isn't every one else's!

Sorry to say, but you're indeed the one who sounds retarded!

posted on 23 Dec 2015, 14:19

49. apakalo1 (Posts: 37; Member since: 19 Nov 2015)


@Hexa core,,, you people have problems I think. There are phone choices with THAT REMOVABLE BATTERY. Why bashing bashing bashing ? ?

Why won't you bash iPhone also which even has tiny battery compare to Samsung .Infact there's a serious problem with lot of people in this world

posted on 28 Dec 2015, 09:59

63. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


Well alot of theings said by everyone here is subjective. The average person works 8 hours or they work in a place where charging a phone is less likely, like for example if you work in retail.

But if you work in places where you aren't going to be using your phone anyways, then battery-life for such isnt a problem. Not very many people work 12 hours. For those who do, then you'd be stupid to either buy a phone with a removable battery so you can insert a battery, or buy a phone that offers fast charging.

Sorry, I dont give excuses for information that people can easily look up online and compare what they need vs just blowing money on a device simply because it may be popular. Just because it is popular, doesn't mean that device suits your needs.

I can't think of a situation where charging a phone within 12 hours is 100% impossible. Again, if your case is that unique, then you need to buy a device that works for yoru unique situation.

I am speaking of the vast majority, not the very few exceptions to the rule.

posted on 28 Dec 2015, 10:07

64. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


Tourism? Doing what? Planes have chargers, many buses have chargers.If You work in any environment where you can't charge your phone, that also must mean you wont be using it. RIGHT?

My statement isn't subjective. It is simply a case by case conclusion. The average person works no more than 12 hours per day.

Even if at work you are not permitted to charge your phone, you have options. If you drive to work, you can have chargers in yoru car.

There are battery packs you can buy or cases that are designed to fit your phone that have a battery-pack. There are phones that offer quick chargign capabilities where you can get as much as 4 hours of usage from a 10-15 minutes hookup to the charging cable and adapter.

Then there are devices with wireless chargers where the charging station is just a pad, you can easily just have on your desk charging your phone without anyone even noticing

Vast majority of people dont have charging issues. If you can charge a phone in 12 hours, then you have a serious personal problem. The problem is simple. Either you didnt comparison shop to buy a phone that better fits your needs, you didnt' look into alternatives ways to insure you have a phone that works all day or whatever. All are YOUR problem.

This all goes for me too. I dont buy what is popular. I buy what works and offers what I need. I drive to work. On the way home, I have a quick charger in my car so I can hook up if I need to. I also do have a battery pack I was given at home which I have never used, in the event I think I will be out.

Unless you are at the beach all day or a Disney themes parks all day, I can't see where you can charge a phone. Even on trans-continental flights, there are chargers on the plane.

posted on 23 Dec 2015, 14:30

50. Kary1 (Posts: 300; Member since: 26 Jun 2015)


There are many reasons to want a removable battery besides wanting to do a battery swap.

1. Removing a battery is the fastest way to reboot if you have a troublesome app.
2. Batteries have limited life, and batteries can be damaged by heat. Replacing the battery can restore the original battery life of the phone.
3. If your phone's charging system goes bad, a removable battery will allow you to diagnose that it is the phone's charging system and allow you to limp by until you get a replacement phone. Without that you just have a small brick.
4. Samsung produced some S4s that came with defective batteries that they were replacing under warranty. To check your battery you had to remove it from the phone.
5. Removable batteries mean there are usually non-OEM options for larger batteries. Motorola has even had some OEM options for larger optional batteries.

posted on 23 Dec 2015, 16:48

52. cheetah2k (Posts: 1521; Member since: 16 Jan 2011)


1. You can use various button combo's to 'hard' reboot the phone without removing the battery
2. Batteries have a limited life of around 1000 cycles before they start to lose capacity. This does not mean the battery will stop charging at 1000 cycles... 1000 cycles for a Samsung user is around 1000 days - thats approx 3 years. Most people in the world have their phones for 2 years max (contract periods) before ditching them.
3. If you are that worried about your batteries, then get a external powerpack. Most iphone users have them anyways :)
4. If any samsung phone with a fixed battery gets a recall, you get a brand new phone. Sounds good to me!
5. Non-OEM batteries are the causes of a lot of fires. I'd rather stick to OEM batteries!

posted on 24 Dec 2015, 15:06

55. Kary1 (Posts: 300; Member since: 26 Jun 2015)


From Cheetah2k:
---1. You can use various button combo's to 'hard' reboot the phone without removing the battery

I said the fastest way. Not the only way. Answer fail.

----2. Batteries have a limited life of around 1000 cycles before they start to lose capacity. This does not mean the battery will stop charging at 1000 cycles... 1000 cycles for a Samsung user is around 1000 days - thats approx 3 years. Most people in the world have their phones for 2 years max (contract periods) before ditching them.

I didn't say the batteries would quit working--I said you could restore the life of the battery. I also mentioned batteries being damaged by heat. But in any case, not everyone wants to change their phone every two years, and with the end of subsidies, that's going to be more common. Answer fail.

---3. If you are that worried about your batteries, then get a external powerpack. Most iphone users have them anyways :)

That goes more to the swapping issue which I specifically wasn't addressing. But the fact that iPhone owners have to do something doesn't mean others should want to do it. Answer fail.

--4. If any samsung phone with a fixed battery gets a recall, you get a brand new phone. Sounds good to me!

I really don't think you would have seen Samsung recall all the S4s that had been sold at that point in time. They would have just waited for each phone to fail. And speaking of failing--answer fail.

---5. Non-OEM batteries are the causes of a lot of fires. I'd rather stick to OEM batteries!

That's your preference, not everyones'. But my entire point of posting was to note that there were reasons other than swapping batteries during the day to want a removable battery. You've failed to refute a single reason. Post fail.

posted on 28 Dec 2015, 10:14

65. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


Yes there are lots of reasons. I have never pulled a battery for a troublesome app. I just hold the buttons for however long. Sure pulling a battery is quicker than waiting maybe 10 secs for using buttons. But since this is a very rare happening, doesnt jusify the need. Unless you rooting and install ROM or other junk, app issues are very rare on that level. At least in my experience.
I usually just reboot my phone with no issue. I've not had a phone just lock up on me.

Replacing a dead battery? While under contract or on a payment plan, your carrier must replace a phone is it stops working. Now if you plan to keep a phone [past its warranty period, then you should buy said phone from a retailer and purchase an extended warranty or service plan of some type.

Also many credit card companies allow replacement of non-functioning items if you bought with your card, even past the warranty period. Lots of people don't know this.

If any brand makes a phone with a defective battery even if you can't pull it out, you can still see if you have a defect unit, because the OEM will just provide a phone model number based on its manufactured date.

What you gave was a list of ways people have gotten use to doing things, all have alternative methods that provide the same solution end the end.

posted on 29 Dec 2015, 03:37

66. JakCannon (Posts: 4; Member since: 29 Dec 2015)


The key words you used there were "alternative methods"
I had to pull the battery from my phone multiple times for an issue I was having, until I figured out what was causing it. Happened days apart, inconsistently, so took me awhile to find it.
None of the button tricks worked.... and believe me, I tried, as I did NOT want to take my phone out of its rather involved Otterbox case.
A computer of ANY type without a physical power breaking switch can only be REQUESTED to power off. And what if it's so scrambled that it's not paying attention to such coded signals or requests?
You get the idea.
Here's another one for ya.... drop the thing into water, it's a damned good thing to get that battery disconnected as quickly as possible, so the wrong bits aren't fried by any shorts before it has a chance to dry. Pull that battery, and there is ZERO power on destructive tap inside that phone. Peace of mind until it can be dried out.
Yes there are water-resistant phones... before you counter with the magically perfect form of the new phones... but they're not water-proof. Especially when you consider the wear and tear on them and the affects this has on any seals. Even minor, almost innegligible damage to the bezel can result in openings to allow water in.
And this is all just for the removeable battery issue.

Just because YOU can do without a feature, such as removeable batteries, removeable flash memory, etc... doesn't mean that others should have to.
Use your own logic on yourself, mate!!
And in answer to your "something is seriously wrong with you", I work on the road as a contractor. It's not uncommon for me to be on a jobsite, running wiring in a newly built multi-story building from sun-up till sun-down (because the building has no power yet) and being hours away from home, I try to maximize my accomplishment for each day I hit it. As such, I keep four batteries on me, as I can't just conveniently leave the phone in the truck. It has to be on me, and I'm going to be on it much of the day, hands free, work-related.
Removeable memory is a HUGE thing for me, which is why I won't be progressing beyond the S5 until Samsung figures out how to handle their bottleneck with removeable cards... I want to be able to remove my data files if the phone gets destroyed by a massive fall, being run over, or any other situation... It runs auto-backups after midnight, and It's common for me to have valuable paperwork scans ofr pictures or technical detail videos pertaining to my job sites that haven't been backed up by their subsequent midnight transfers yet. So it's nice to know they're on a card which is very well protected inside that destroyed phone.

I've heard no word on the SD situation on the S7 yet, but hopefully they will have learned and made that a priority to get them BACK into the S line. Being that I've seen suggestions of it being a magnesium/glass build, I'm guessing they'll still have the retarded fixed battery.

posted on 25 Dec 2015, 00:34

56. HK-USP (Posts: 1; Member since: 25 Dec 2015)


I for one agree, it is one of the primary reasons I own a S5! Removable batteries are the ticket. I use my S5 for checking wireless signal strength while installing surveillance systems, and it beats the hell out of packing around a laptop. So yes carry an extra battery and away you go. It silly to HAVE to plug you phone in because you actually use it! This was one reason I did not like my iPhone 4S. Not too bad just break out the micro screw driver set and change you battery wherever you happen to be. Yeah right!

posted on 25 Dec 2015, 06:19 2

57. Hexa-core (banned) (Posts: 2131; Member since: 11 Aug 2015)


I'll take removable battery over "premium build" any day!

posted on 23 Dec 2015, 16:06

51. Sealblaighter (Posts: 203; Member since: 26 Jan 2014)


I agree with you. For example, they should change the shape of the camera to circle, because the current one is boring.

posted on 23 Dec 2015, 18:54

53. engineer-1701d (Posts: 3271; Member since: 13 Mar 2014)


i love magnesium my bikes engines have mag valve covers and other areas very light weight.
i agree antutu i did not like gs6 design that much i have gs6 but i dont like the glass back would like to see sammy copy lg v10 back tpu rubber removable back plate, grippy and nice looking.
hahaha a copy i approve of

posted on 29 Dec 2015, 03:43

67. JakCannon (Posts: 4; Member since: 29 Dec 2015)


When I saw articles touting the magnesium allow hoopla, I was reminded of the custom rims of the 60's and 70's.... remember when "Mags" was the go-to wheel upgrade? ;-)
I still have an old Fiat Spyder with mags. And she still looks sexy. ;-)

posted on 23 Dec 2015, 03:34 6

2. Manyci (Posts: 115; Member since: 03 Aug 2015)


You forgot mentioning, that Meizu has a magnesium-unibody phone as well (Meizu Metal)...

posted on 23 Dec 2015, 04:14 1

4. carlemillward (unregistered)


Of course they won't, but according to reviews, it doesn't feel like metal, yet better than plastic. Which is weird.

posted on 23 Dec 2015, 06:50 2

16. Macready (Posts: 857; Member since: 08 Dec 2014)


I had a high end ultra thin portable MD player from Sony that was fully made from a magnesium alloy. It was so light that it was hard to believe you were holding a metal device and the fact that it didn't feel as cold as my other alloy MD player reinforced the perception of holding a plastic device instead.

posted on 23 Dec 2015, 09:24

29. Ashoaib (Posts: 3229; Member since: 15 Nov 2013)


does it scratch easily like aluminium? if yes then it is another cheap metal... Why not liquid metal? which we heard that it is stronger than titanium and lighter than aluminium

posted on 23 Dec 2015, 09:40

30. ph00ny (Posts: 1193; Member since: 26 May 2011)


Magnesium isn't cheap hence the reason why it's not commonly used despite the fact that it has better characteristics than aluminum

posted on 23 Dec 2015, 11:58

43. Macready (Posts: 857; Member since: 08 Dec 2014)


Not at all. Looks brand new after 15 years. It clearly has a treated surface, just like most alloy phones.

posted on 29 Dec 2015, 03:54

68. JakCannon (Posts: 4; Member since: 29 Dec 2015)


Bahahahahaha!!!!!!!!

Listen.... soft metals scratch. Aluminum and magnesium are both soft metals. They're also non-ferrous, which is what is most desired in such applications.

All metals, when brought to their melting point, are liquid. I can only think of one metal which is liquid at ambient temperatures, mercury.... there may be ther more exotic ones, but you can't do anything with those metals. So.... what could you possibly be talikng about? lol
BTW, the only place you'll be seeing the metal is in the bezel anyway. Nobody cares if the outer bezel gets scratched. The obvious surfaces, front and back, are gonna be glass anyway, which brings its own set of conflicts.
There is NO perfect and impervious solution, mate!

posted on 23 Dec 2015, 11:35

38. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


It doesn't feel like metal. I have the Surface 4 which is the first device I know of that was made using Magnesium.

The construction doesn't feel like metal or looks like it either.
It feels and looks like matte plastic. But you can tell its fair strong and yes it is very light.

Considering the Surface Pro 4 is a full PC/laptop shoved into a tablet and it weights less than many small laptops, including the Macbook Air.

But IMO, the cols harder feel of the aluminum on my Note 5 (which feels better and more solid vs other phones made with similar material), I rather have the 7000 series aluminum as far as that goes.

When you take your finger and pop the metal rim of the Note 5, it feels very solid, there is no echo. Unlike some other phones I have felt, they dont feel as solid when the whole case is made of the same.

posted on 23 Dec 2015, 03:43

3. omar98 (Posts: 56; Member since: 28 Aug 2011)


Wouldn't magnesuim suffer from higher chances of corrosion?As far as I'm concerned it doesn't have the same protective layer as aluminum

posted on 23 Dec 2015, 04:34 8

6. rd_nest (Posts: 1591; Member since: 06 Jun 2010)


Nobody will use pure Mg to make the shell, it will be made of some Mg-based alloy.

Aluminium is very reactive with water/atmosphere. What actually happens is that the moment pure aluminium is exposed to atmoshere, it reacts and forms a layer of aluminum oxide. This layer of aluminum oxide is very resistant to corrosion or water. This layer of aluminum oxide protects the inner 'actual aluminum' from further reaction/corrosion.

posted on 23 Dec 2015, 07:53 5

21. SYSTEM_LORD (Posts: 427; Member since: 05 Oct 2015)


Correct. Titanium has this property (to a large extent) as well. It's called passivation. You can get active passivation by the inclusion of Germanium into alloys as well. I'm certain that the inclusion of aluminum, as well as other metals, into the magnesium alloy grants it high corrosion resistance.

posted on 23 Dec 2015, 08:03 1

23. rd_nest (Posts: 1591; Member since: 06 Jun 2010)


^^ hah.. good info.

Not in touch with chemistry much now, though I did study basic material engineering during my college. Nice time to revise the topics again.

posted on 23 Dec 2015, 04:36

7. aimkul (Posts: 33; Member since: 07 Nov 2015)


Ha another rumour..samsung always plays safe that's why they choosed Exynos in s6 not SD..but sony headed in typical manner and result is clean and out

posted on 23 Dec 2015, 05:46

11. ibend (Posts: 3758; Member since: 30 Sep 2014)


still better than rumour about iPhone6 will use sapphire glass screen, and then GT advanced went bankrupt, lol

posted on 23 Dec 2015, 05:42 6

10. Macready (Posts: 857; Member since: 08 Dec 2014)


Magnesium alloys tend to be much stronger. And btw, the S6 Edge plus and Note 5 also feature a 7000 series alloy (before the iPhones).

posted on 23 Dec 2015, 05:48 14

12. ibend (Posts: 3758; Member since: 30 Sep 2014)


yeah right, dunno why they like to bring up apple :-/
and they always bring up single score result as excuse to mention apple chipset on every geekbench result, weird :-/

posted on 23 Dec 2015, 06:18

13. ProudGoooner (Posts: 6; Member since: 18 Mar 2015)


what's the point of having a magnesium or an aluminum mobile body if you're going to wrap the whole thing in silicone -_- stuffs will just make the mobile cost more that's all in my opinion...

posted on 23 Dec 2015, 08:20

24. SYSTEM_LORD (Posts: 427; Member since: 05 Oct 2015)


This article is misleading. Apparently, magnesium alloys are not stronger than the stronger aluminum ones. It's used in situations where a very light, yet bulky structure is desired, such as the camera above or something like an engine block.

"Magnesium's particular merits are similar to those of aluminium alloys: low specific gravity with satisfactory strength. Magnesium provides advantages over aluminium, in being of even lower density (approx. 1800 kg/m³) than aluminium (about 2800 kg/m³). Mechanical properties of magnesium alloys, however, are below those of the strongest of the aluminium alloys."

Magnesium alloys are better for rigidity, but are more brittle. Because of the tendency to deform at lower temps, it is better for die casting--not necessarily machining.

It would likely be better for Samsung to use the 7000-series aluminum than for them to use this material. Phones are so small that the weight differences don't justify the drop in strength.

posted on 23 Dec 2015, 11:57

42. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


Again, what you state would be 100% correct in the case where Magnesium was solely the only metal being used. For a phone the Magnesium would be mixed as Samsung already does now as most of there earlier phones, though plastic on the outside, used a rigid Magnsium alloy frame which was mixed with other metals for strength.

The Note 3 is a perfect example and why it took 150lbs of solid pressure for it to bend, while the iPhone of the same year took 1/2 as much weight to break/deform.

Samsung and Microsoft used it correctly. Have you felt and Surface Pro 4? It is very light yet it feels as solid as any metal laptop. Even the kickstand which is very thin and rigid, doesn't feel like it will just snap.

posted on 23 Dec 2015, 12:43

47. SYSTEM_LORD (Posts: 427; Member since: 05 Oct 2015)


That article was about magnesium alloy. Perhaps we don't put the kinds of stresses on devices we own that would show the difference between high grade aluminum alloys and magnesium alloys, but if we did, you'd see that the best aluminium ones are more secure.

posted on 23 Dec 2015, 09:07

26. Kary1 (Posts: 300; Member since: 26 Jun 2015)


I remember back in the 60s when Lawnboy mowers with Magnesium bodies were the premium product. Now it's Honda mowers with plastic bodies. But the tech press thinks plastic is an inferior material, and Samsung listens to the tech press more than their own customers, so . . ..

posted on 23 Dec 2015, 09:12

27. jeroome86 (Posts: 886; Member since: 12 Apr 2012)


Looks like a premium Galaxy line is on the way. Shaping up to be a great year for mobile gadgets.

posted on 23 Dec 2015, 11:22

34. TechieXP1969 (Posts: 8811; Member since: 25 Sep 2013)


So we have an article where we are talking about Samsung using Magnesium on the S7. The writer gives a comparison to the iPhone 6S using 7000 series aluminum.

Why does the iPhone have to be mentioned in this article? The galaxy S6 Edge+ also uses 7000 series aluminum. So why not use it as an example.

This is why I personally have "fanboy" hatred. There is no need to mention Apple and Samsung together when an example can be used to describe what you are talking about with a single said company.

Samsung has phones made with 6000 and 7000 series aluminum and they use the 7000 series before Apple did, and it didn't require a bending phone for them to make the move.

When the article is about Apple or Samsung, you only need to mention the competitor if it actually is a comparison that needs to be made, like benchmarks, or quality of components or photos where there is a literal comparison being done.

But in this specific case and so many others, Apple didnt need to even be mentioned.

We don't need Apple thrown into every Samsung article, just like Samsung doesn't need to be mentioned in every Apple article.

posted on 23 Dec 2015, 13:39

48. belovedson (Posts: 984; Member since: 30 Nov 2010)


Phonearena hire some android lovers who actually understand modern technology and are there for geeks at heart. Please stop hiring pundits who follow trends especially Apple only or Samsung only followers. Seriously the lack of editing from this site continues to be well insufficient.

posted on 23 Dec 2015, 18:59

54. MrElectrifyer (Posts: 2283; Member since: 21 Oct 2014)


No need for iPhonearena's sugar coating, get the facts from a more credible site:

bit.ly/1Ec2z5k

posted on 25 Dec 2015, 13:26

58. rambo6 (Posts: 22; Member since: 06 Apr 2015)


How about neither. I am sick and tired of the pundits on these phone sites worrying so much about "built quality." Build Quality is BS. Phones are obsolete in 6 months and most people seldom use them for more than 1 or 2 years. What was wrong with the original Galaxy Note, Note 2, and Note 3? The answer is nothing.

This build quality BS has made phones more like Apple because all the pundits say built quality, build quality, built quality. Not only are the Aluminum frames more expensive, they are heavier also. I'd rather have a plastic phone with an excellent screen, lots of power, and most of all performance.

My dream phone would be a plastic framed Galaxy Note with Pure Google Software that would be updated just a few weeks after Google releases its latest release. Samsung would have apps for the touchwiz so that you could install it or not. The battery would be removable. It would have FM radio also and an SD card slot. The price would be $500 to $600 Unlocked. It would have a plethora of LTE radios and use Exynos hardware not that overheating Snapdragon stuff.

posted on 27 Dec 2015, 06:31

59. jasrockett (Posts: 52; Member since: 05 Oct 2011)


My HTC HD2 from 2009 has a magnesium body and all of my Canon 1 series cameras and my Dell Precison laptops, current one is carbonfiber

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