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01-06-2013, 07:03 PM
(This post was last modified: 01-06-2013, 07:07 PM by Sunset Machine.)
There's usually some good info at Speedy Metals, here's what they have to say:
http://www.speedymetals.com/information/Material42.html
The index to their library:
http://www.speedymetals.com/information/...lframe.htm
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I've found 4140 great to machine, gives beautiful finish, no tear out as you get with mild steel.
The link says you need to preheat to weld, I've never, use a low hydrogen rod as 7018 or mig. Will harden in the weld zone though if you need to machine after welding.
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Greg
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Are you going to be turning it or miling it, Ed?
It does machine very nicely, I love plowing through it in either way. It makes nice chips and leaces a shiny finish! Also, it doesn't work harden like 316 or 304 stainless steel does so easily.
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4140 is very nice to machine Ed, I think you'll like it. If you are used to machining low carbon steels, you'll find that most tool steels will machine yield a much better surface finish, they just take a bit longer to machine. The barrel for my Steven's is 4140 pre-hard (Rc32) and I've never used that before. Hopefully it won't be too painful.
Tom
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(01-06-2013, 10:06 PM)PixMan Wrote: Are you going to be turning it or miling it, Ed?
It does machine very nicely, I love plowing through it in either way. It makes nice chips and leaces a shiny finish! Also, it doesn't work harden like 316 or 304 stainless steel does so easily.
I'll be turning it.
Ed
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01-07-2013, 08:23 AM
(This post was last modified: 01-07-2013, 08:24 AM by Mayhem.)
Turning it into what Ed?
Hunting American dentists since 2015.
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Hopefully not just chips.
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(01-07-2013, 08:23 AM)Mayhem Wrote: Turning it into what Ed?
A part for the indicator holder for my QCTP. It doesn't need to be 4140 but since I bought some, I thought I'd get some experience machining it.
Ed
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What kind of turning tools do you have, Ed? I have some GREAT steel turning inserts I could send you to try. If you have insert holders just let me know what they are and I'll happily send you some inserts.