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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel and Action Nitride Coating
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<blockquote data-quote="shortgrass" data-source="post: 2779882" data-attributes="member: 24284"><p>Salt bath nitride treatment is done <em><strong>after</strong></em> heat treating. Applies to CM and 416SS. Nitriding is an "add on", <strong><em>NOT</em></strong> a substitute for heat threating. Remington 700s. both CM and SS, are machined from pre-heat treated steel. It arrives/arrived at the Remington factory heat treated , probably from the mill it was purchased from. Just because a Rem 700 action can be cut with a file doesn't mean that it's not been heat treated. It has been 'hardened and tempered'. As a machinist (and I began machining in 1974) we have been cutting 4140PH (pre hardened) since it became available. Hard on HS tooling? Yes! But we machined precision parts from it all of the time! Now, most all tooling is of carbide, which will withstand the heat. If you machined an action from annealed steel, and then heat treated it, it would warp because of the differing thicknesses that are found across the action. The loading port side being thinner than the opposite side. Deflection (warpage) has always been a problem when heat treating, whether it be 'case hardening' low carbon steel or 'through hardening' like 4140 and other modern alloys are hardened. As an after note, nitriding can not be done to low carbon, case hardened steels, only on modern, through hardening alloys.</p></blockquote><p></p>
[QUOTE="shortgrass, post: 2779882, member: 24284"] Salt bath nitride treatment is done [I][B]after[/B][/I] heat treating. Applies to CM and 416SS. Nitriding is an "add on", [B][I]NOT[/I][/B] a substitute for heat threating. Remington 700s. both CM and SS, are machined from pre-heat treated steel. It arrives/arrived at the Remington factory heat treated , probably from the mill it was purchased from. Just because a Rem 700 action can be cut with a file doesn't mean that it's not been heat treated. It has been 'hardened and tempered'. As a machinist (and I began machining in 1974) we have been cutting 4140PH (pre hardened) since it became available. Hard on HS tooling? Yes! But we machined precision parts from it all of the time! Now, most all tooling is of carbide, which will withstand the heat. If you machined an action from annealed steel, and then heat treated it, it would warp because of the differing thicknesses that are found across the action. The loading port side being thinner than the opposite side. Deflection (warpage) has always been a problem when heat treating, whether it be 'case hardening' low carbon steel or 'through hardening' like 4140 and other modern alloys are hardened. As an after note, nitriding can not be done to low carbon, case hardened steels, only on modern, through hardening alloys. [/QUOTE]
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Barrel and Action Nitride Coating
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