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Long Range Hunting & Shooting
Proof Carbon Barrel Cooling
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<blockquote data-quote="cohunt" data-source="post: 1693118" data-attributes="member: 94491"><p>here is some info on 416R ss barrel blank material i found online:</p><p></p><p>*950-1000 deg for 2-4 hours then air cool is used to stress relieve the steel</p><p>*re-anneal is 1300 degrees</p><p>*harden: pre-heat to 1400 deg, then austenitize at 1800 degrees for 30-60 min, then oil or salt bath cool/quench to below 125 degrees</p><p>* tempering starts at 350 to 450 degrees, but they recommend 500-900 degrees for 4 hours</p></blockquote><p></p>
[QUOTE="cohunt, post: 1693118, member: 94491"] here is some info on 416R ss barrel blank material i found online: *950-1000 deg for 2-4 hours then air cool is used to stress relieve the steel *re-anneal is 1300 degrees *harden: pre-heat to 1400 deg, then austenitize at 1800 degrees for 30-60 min, then oil or salt bath cool/quench to below 125 degrees * tempering starts at 350 to 450 degrees, but they recommend 500-900 degrees for 4 hours [/QUOTE]
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