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I've seen a few short run action using this steel. So, what's the deal, it doesn't rust blue as easily at some. added nickle but less carbon and chromium than 4041. does that make it much easier to machine? or is it size availability? Rich | ||
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Widely used...this is the steel of choice for Granite Mountain Arms Actions | |||
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I believe it is easier to color case FWIW. Jason "You're not hard-core, unless you live hard-core." _______________________ Hunting in Africa is an adventure. The number of variables involved preclude the possibility of a perfect hunt. Some problems will arise. How you decide to handle them will determine how much you enjoy your hunt. Just tell yourself, "it's all part of the adventure." Remember, if Robert Ruark had gotten upset every time problems with Harry Selby's flat bed truck delayed the safari, Horn of the Hunter would have read like an indictment of Selby. But Ruark rolled with the punches, poured some gin, and enjoyed the adventure. -Jason Brown | |||
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Typically 8620 is a case hardened steel. If it is properly heat treated it will blue nicely but may not rust blue. It will take a color case though. It can be trough hardened but in most cases it is case hardened. it is also a very strong steel and if the case is the correct depth it will be one hell of an action www.KLStottlemyer.com Deport the Homeless and Give the Illegals citizenship. AT LEAST THE ILLEGALS WILL WORK | |||
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I've rust blued several..just takes a few more coats...maybe because of the nickel? | |||
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easy to machine, easy to harden, doesn't warp BADLY, can be colorcased, surfaced hardened, and still remain elastic internally .. an amazing metal opinions vary band of bubbas and STC hunting Club Information on Ammoguide about the416AR, 458AR, 470AR, 500AR What is an AR round? Case Drawings 416-458-470AR and 500AR. 476AR, http://www.weaponsmith.com | |||
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John Deere uses a lot of it because it is cheaper to case harden 8620 than to buy chrome-vanadium steels, like 4140 and 4340 and thru harden. In many applications strength isn't as important as wear resistance. Case hardened 8620 shines in that area. I was an engineer there for 23 years....Tom SCI lifer NRA Patron DRSS DSC | |||
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thank you all. very interesting stuff. Rich | |||
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8620 is also the steel used in just about every rear axle's differential gearing and axle shafts. The ring, pinion, spider gears, and axles are 8620 from the factory. After market stuff is usually CM www.KLStottlemyer.com Deport the Homeless and Give the Illegals citizenship. AT LEAST THE ILLEGALS WILL WORK | |||
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8620 was used for the M-14, Not the M-1. | |||
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Please see "Hatcher's Notebook" (1947), Page 230; "Material: After July 1942, WD No. 8620 Modified, same as for the bolt." Of course, he could be wrong... I did not check the TDP. | |||
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