What specs govern "gun quality steel"? 7

[Lyrl]

Today I had a customer contact me asking if "regular" 8620 steel would respond to heat treat any differently than "gun quality" 8620 steel. I speculated that "gun quality" steel might have tighter alloy and cleanliness tolerances but for their application (a small part with a shallow case depth) I didn't expect any significant difference.

I would like to follow up after having reviewed the actual (not my speculation) requirements for "gun quality" but wasn't able to find anything from my friend Google - maybe I'm searching for the wrong term?

Any tips on what criteria or specifications mills use when certifying a lot of steel as "gun quality" would be much appreciated. (I'm in the U.S. if that affects the answer.)

 

[EdStainless]

tbuelna, there are a number of AMS specs for tubing for aerospace use that the only difference from common ASTM commercial material is the NDT required. No restrictions on melt, chem, HT, or process. It is all in the details.

We actually supply 416 (free machining) for a gun barrel application. The want material with stringers in it so that they can control the failure mode (barrel before breach).

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube