Author Topic: got stainless? (Read 608 times)

mortarnoobie · « **on:** May 08, 2005, 08:26:14 AM »

anyone ever looked at guns on this site? those two pictures really caught my eye... 316 stainless steel tennis ball mortar (seems like a pretty light projectile for such a heavy duty barrel... i love the angle adjusting wheel though), and 68 cal cannon.

http://www.cannon-mania.com/foundry.htm

thats the site if you want to scroll down and read about it.

CAV Trooper · « **Reply #1 on:** May 08, 2005, 05:54:40 PM »

They sure look purdy and they sure won't rust. A lot of work went into those projects.

My only problem with using 316 is that it has a yield strength of only about 30,000psi. Where safety is concerned, that's down on the low end of the scale when it comes to firing projectiles with BP. In this game, when it comes to the strength of your materials, MORE is better.

Cat Whisperer · « **Reply #2 on:** May 09, 2005, 01:03:18 AM »

Quote from: CAV Trooper

They sure look purdy and they sure won't rust. A lot of work went into those projects.

My only problem with using 316 is that it has a yield strength of only about 30,000psi. Where safety is concerned, that's down on the low end of the scale when it comes to firing projectiles with BP. In this game, when it comes to the strength of your materials, MORE is better.

Very good point. The chromium that is added (to make stainless) is added for one of two reasons - abrasion resistance or corrosion resistance. - not strength nor for machinability.

mortarnoobie · « **Reply #3 on:** May 09, 2005, 12:39:08 PM »

being generally a machining and metal noobie still, i didn't know these things... i guess a tennis ball is appropriate. thanks for the info. i guess you learn something new every day (=

GGaskill · « **Reply #4 on:** May 09, 2005, 01:13:02 PM »

http://metalwebnews.com/machine-tools/fmt.html" target="_blank">TC 9-524 should be full of new things to learn. (-: