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Hollowbuilt
07-21-2009, 01:18 AM
I need to swage some tubing, approx. 1/4" id. with .020" wall thickness. It has a Brinell hardness of around 80. Has anyone used 12L14 or 11L17 as die stock for similar purposes? I have been using A1 or O1 tool steel, but the machining is slow going, and I wonder if it's overkill for my purposes. Any thoughts would be appreciated, especially from those of you familiar with using the leaded steel.
Thanks,
Chris

JCHannum
07-21-2009, 08:08 AM
12L14 and 11L17 are both low carbon steels. They can be case hardened. 11L41 and 41L40 are medium carbon free cutting steels that can be direct hardened.

lazlo
07-21-2009, 09:40 AM
12L14 and 11L17 are leaded steel -- they're very soft. Seems like that would be about the worst possible material to make a swaging die.

4140 PreHard would be much better, if it's available.

JCHannum
07-21-2009, 10:25 AM
I was making the assumption that the OP intends to heat treat the die after machining. I know about assumptions, and if that is not the case, leaded steels are not a good choice.

Paul Alciatore
07-21-2009, 11:32 AM
I'm no where near an expert, but it may also depend on how many stamping cycles you need to do. A dozen or two may go quite well but 10K or 100K would be another thing.

Ken_Shea
07-21-2009, 11:51 AM
Paul makes a valid point, with the 12L14 having about twice the OP 80 Brinell specification.