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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing

transvaal
.300 member

Reged: 19/01/13
Posts: 131
Loc: South Carolina

Re: 4140 steel and color case hardening compatibility
22/09/13 01:29 AM

Bob the birdhunter is correct that 4140 alloy steel is not to be used for normal high temperature quenching color case hardening(CCH), as it is a through hardening steel. The 8620 alloy steel that you mentioned can be CCH, I believe.

However, that being said 4140 alloy steel produces beautiful coloring when Turnbull uses their modified approach to CCH for it specifically, and there appears to be scant surface hardening, or at least that is my observation on the work that Turnbull did on the 20 bore DR they CCH for me. See this link to the "Paradox" forum: http://forums.nitroexpress.com/showflat.php?Cat=0&Number=225579&an=0&page=0#Post225579

Transvaal, AKA Steve

Post Extras

Entire topic
Subject	Posted by	Posted on
4140 steel and color case hardening compatibility	Crusader68	20/09/13 08:16 PM
Re: 4140 steel and color case hardening compatibility	doubleriflejack	21/09/13 06:14 AM
Re: 4140 steel and color case hardening compatibility	transvaal	22/09/13 01:29 AM
Re: 4140 steel and color case hardening compatibility	Ckhobart	22/09/13 04:20 AM
Re: 4140 steel and color case hardening compatibility	hoosier	22/09/13 07:49 AM
Re: 4140 steel and color case hardening compatibility	Crusader68	22/09/13 03:53 PM
Re: 4140 steel and color case hardening compatibility	Crusader68	01/10/13 09:23 AM
Re: 4140 steel and color case hardening compatibility	Birdhunter50	20/09/13 09:50 PM

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