DIYbanter - View Single Post

wrote:
You will have an easier time finding it if you use the correct name
15-5 ph.
Sorry about that.

You don't have to be sorry for *MY* ignorance. I just hadn't seen that
yet, so I didn't know that was its proper name. Thank you for cluing
me in.

There is also other grades of Precipitation
Hardening ( PH ) stainless. 17-4 is one of them.

I was also wrong about the heat treat. 900 degrees F ( not C ) for
an hour and air cool is a common heat treat. Typically gets 200 ksi
and C 46 hardness ( from AK steel web site ).

Wow, thanks a bunch for looking into that for me. I really appreciate
that. Although even 900F does sound a lot better, and the fact that
it's air hardened sounds very attractive, boy, it still sounds like it
could be expensive. I haven't run any numbers yet, just a SWAG.

However, the lower temperature sounds a lot cheaper, but then again, it
has to be held there for an hour. The air quench also makes it sound a
lot more attractive than oil, or worse yet, cyanide (or other forms of
OSHA and environmentalist fodder). Certainly don't think I like water
quench materials. Much too much distortion, from what I hear.

I also did a bit more looking. Custom 450 stainless from Carpenter
Technology is essentially the same steel.

Ah. Thank you. That was another one recommended in this thread.

Dan

Thank you for all the help. Looks like I've got some homework to go do
now, but at least I've also got some direction.

Thanks,
tg.

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