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Type: Posts; User: sargentcrunch

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    The newspaper thing is interesting, I was...

    The newspaper thing is interesting, I was thinking about something like that earlier, might give that a try on a test piece to see. Thanks!
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    Oh my bad, its 1 inch diameter, .25 inch wall...

    Oh my bad, its 1 inch diameter, .25 inch wall thickness. Its going to be done in a furnace, I am not going to use SS foil but ATP anti scale coating so I don't have to fumble around with foil before...
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    How big were the parts you were doing? The first...

    How big were the parts you were doing? The first part I have to do is essentially a 4 inch long tube with .25 inch wall thickness. My biggest concern is overcooking it and ruining the part. Granted,...
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    It seems like from my research, hold at...

    It seems like from my research, hold at austenitizing temperature for 1 hour per inch of thickness. So for a .25 wall thickness tube, I would hold for about 15 minutes from what I gather.
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    Ok thank you! So just to verify, you put the...

    Ok thank you! So just to verify, you put the prewarmed part in, then ramp up to 1200f and let the part 'equalize' so to speak. Then ramp up to austenitizing temperature? Sorry, asking a lot of...
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    Quick 4140 Heat Treat Question

    When you guys heat 4140, do you put the part in the cold oven and bring up to austenitizing temperature? Or do you preheat the oven to austenitizing temperature and then put the part in, and wait for...
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    Thanks for all the answers everyone, I might go...

    Thanks for all the answers everyone, I might go with the ATP-641 after researching it some. That seems like it would work pretty good for my needs
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    4140 Heat Treat Questions

    I am going to be heat treating some 4140 parts soon in a non-controlled environment ht oven, and I have some questions, mainly regarding decarb and scale. It seems that the best ways are obviously...
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    This would be for a .44 magnum single shot, I...

    This would be for a .44 magnum single shot, I sent an email to LaSalle to see what they say. Though I imagine as soon as they hear 'gun barrel' they will refuse to comment haha
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    ETD150 Steel

    On McMaster Carr its listed as 'high strength 4140' would this steel be a suitable option for a barrel steel? 130k psi yield is a very attractive number, but I am wondering if there is a...
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