Aluminum Guns

Scandium is one of the alloying agents in 5052 and in 7075 aluminum.
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Scandium is not listed in my metals book for either of these alloys.

5000 series use magnesium as the main alloying element, while 7000 use zinc.

Scandium is not even in the standard alloy list.
 
I have a S&W 3913 that was a cop trade-in. I discovered a crack in the frame a couple months ago. I had probably put between 5-7000 rounds through it.
 
Standard Alloy

Brickeyee,

I'm not sure what you're trying to say. Perhaps you need to get a newer edition of your books.

http://findarticles.com/p/articles/mi_qa5348/is_200302/ai_n21326459/

Are you saying that since scandium/aluminum is not listed as a "standard alloy?" that there is no such thing?

Russian migs before the Soviet breakup.
Guns
baseball bats

I believe scandium is what makes that distinctive ping in a baseball bat.

And for those of you that insist that Damascus steel is not used in Guns, I introduced the word in this thread and I only used it in reference to knives.

I also capitalized the term.

ljg
 
Caspian

I believe that Caspian makes damascus steel parts for some of their guns. They do not make Damascus steel parts for anything.

Damascus steel is the most nebulous term I can think of though 1911 guns have been made of 'damascus' steel.


The above statement is absolutely incorrect.

Damascus Steel is anything but nebulous. It means exactly one thing.

damascus steel is nebulus.

If you insist on nitpicking get it right.

ljg
 
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Im not sure what you're trying to say. Perhaps you need to get a newer edition of your books.
Click to expand...

Sc is not used in 5052 and in 7075.

These are standard formulations, and you cannot add or omit anything in the mix and still meet the type rules under ASTM.

There are a number of Al/Sc alloys in use but most are proprietary (even patented) at this point and not standardized.
 
Aluminum does fatigue more easily than steel - that's easy to verify with a little googling.

But that doesn't mean that aluminum framed semis are done that way to cut corners. It will save weight, I'd take a guess of 1/4lb+ on a full size semiauto. For a nightstand, hunting or target gun, the extra weight is an advantage - holds sights steadier and is more controlled and comfortable in recoil. But for a carry gun, it's a disadvantage.

Under normal use, the aluminum frame will hold up, and owners will appreciate the weight savings in a carry gun. That's called an engineering tradeoff, not cutting corners.
 
You speak Gobbedegook

sc is not used in 5052 and 7075???

Of course it is.

There is a difference between 7075 aluminum alloy and a 7075 alloy. You're right the 7075 composition can't be changed and still call it 7075.

But 7075 can be alloyed with anything.

ljg
 
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