Quote:
Originally Posted by FunwithGuns
Nickel is a non-factor in barrels as they almost always made from a chromium based stainless with no nickle content. Usually a 410/420 grade is used which can be hardened vs the austenitic grades (304/316 18-8, etc.) which can't be hardened with heat-treatment.
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Rifle barrels are usually made from steel alloys called ordnance steel, nickel steel, chrome-molybdenum steel, or stainless steel.