View Single Post
Old February 11, 2013, 10:48 AM   #8
243winxb
Senior Member
 
Join Date: July 26, 2011
Location: USA
Posts: 1,730
The black cases have come in contact with ammonia that forms in nature. This make brass brittle & unsafe. Google "stress corrosion cracking" or "Season Cracking"
243winxb is offline  
 
Page generated in 0.02588 seconds with 8 queries