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AGE · 04-05-2002, 05:18 PM

G.T. Here are a few answers from a mechanical engineer (not a metalurgical engineer and never worked in the firearms industry). Both 4130 and 4140 are Chromium-Moly steels, 4130 has about .30 percent carbon and 4140 has about .40 percent carbon. They can be quite strong (5-10 times) but much less ductile than low carbon steels. Welding destroys the heat treated properties, and they are probably not ductile enough to form or bend into a magazine shape. The 300 stainless steels are very ductile, but not as strong as alloy steels. My guess is that low alloy steels or 300 stainless steels are used in today's magazines.

AGE

04-05-2002, 05:18 PM	#4
AGE User Join Date: Jun 2002 Location: Florida Posts: 597 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Another one for the engineers!!!.....Luger mag shells! G.T. Here are a few answers from a mechanical engineer (not a metalurgical engineer and never worked in the firearms industry). Both 4130 and 4140 are Chromium-Moly steels, 4130 has about .30 percent carbon and 4140 has about .40 percent carbon. They can be quite strong (5-10 times) but much less ductile than low carbon steels. Welding destroys the heat treated properties, and they are probably not ductile enough to form or bend into a magazine shape. The 300 stainless steels are very ductile, but not as strong as alloy steels. My guess is that low alloy steels or 300 stainless steels are used in today's magazines. AGE