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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel hardness
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<blockquote data-quote="Trickymissfit" data-source="post: 481454" data-attributes="member: 25383"><p>Boy that barrel must have been in heat for a long time! I wonder how deep the case went. I never tried to nitride any 400 series stainless, so don't even know what the process would be for starters (keep in mind that I'm or never will be a 400 series fan). </p><p> </p><p>Carbon steel barrels are usually cut from something like 4350 (I suspect everybody has their own private alloy number). Most stainless steel barrels are cut out of 416 because they know how to work with it, and not because it's the best there is. Actually 410 or 420 would be better from the data I have. But once again much harder to machine. Some folks are now using 17PH4 rearc melt stainless. This stuff is not for the faint of heart to machine, but once you learn the process it's fair. Wether they buy it in certified preheat treat lots I don't know, but suspect they are. It'll take more heat that 416, and has better strength & wear properties. A similar steel is MAR-10 from Baldwin Steel in PA. Considered interchangable with 17PH4, but has better maching properties. It only comes in a pretreat form, and special lots of steel with different Rockwells can be had. This steel will not rust. But on the downside is about twice the price per pound. </p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 481454, member: 25383"] Boy that barrel must have been in heat for a long time! I wonder how deep the case went. I never tried to nitride any 400 series stainless, so don't even know what the process would be for starters (keep in mind that I'm or never will be a 400 series fan). Carbon steel barrels are usually cut from something like 4350 (I suspect everybody has their own private alloy number). Most stainless steel barrels are cut out of 416 because they know how to work with it, and not because it's the best there is. Actually 410 or 420 would be better from the data I have. But once again much harder to machine. Some folks are now using 17PH4 rearc melt stainless. This stuff is not for the faint of heart to machine, but once you learn the process it's fair. Wether they buy it in certified preheat treat lots I don't know, but suspect they are. It'll take more heat that 416, and has better strength & wear properties. A similar steel is MAR-10 from Baldwin Steel in PA. Considered interchangable with 17PH4, but has better maching properties. It only comes in a pretreat form, and special lots of steel with different Rockwells can be had. This steel will not rust. But on the downside is about twice the price per pound. gary [/QUOTE]
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Barrel hardness
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