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The Water Cooler
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fire damaged guns
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<blockquote data-quote="dennishoddy" data-source="post: 1640116" data-attributes="member: 5412"><p>It would be hard to tell if they were annealed unless it were a polished natural surface. Most steels that are polished, then annealed will take on a smoky brown patina. It will look similar to case necks on rifle brass that has been annealed. The level of the brown patina will determine how soft the metal is. Darker is softer. Its an old time technique that has been around for a hundred years or so. Those experienced in looking at the same alloy and level of patina will be within a point or two of a rockwell hardness tester.</p><p>Blued surfaces would be difficult to tell.</p></blockquote><p></p>
[QUOTE="dennishoddy, post: 1640116, member: 5412"] It would be hard to tell if they were annealed unless it were a polished natural surface. Most steels that are polished, then annealed will take on a smoky brown patina. It will look similar to case necks on rifle brass that has been annealed. The level of the brown patina will determine how soft the metal is. Darker is softer. Its an old time technique that has been around for a hundred years or so. Those experienced in looking at the same alloy and level of patina will be within a point or two of a rockwell hardness tester. Blued surfaces would be difficult to tell. [/QUOTE]
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