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Join Date: Feb 2009
Posts: 1

Quenching 316L Stainless Steel

02/23/2009 5:20 AM

316L stainless steel is not hardenable by heat treatment. why? (it is austenitic, why cant we get martensite if we heat it up and then quench it?)

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Pathfinder Tags: 316L hardening martensite tempering
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Guru

Join Date: Jul 2006
Location: "Dancing over the abyss."
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#1

Re: Quenching 316L Stainless Steel

02/23/2009 1:39 PM

I'll try to answer why.

1)The austenite is stable at low carbon contents because of the quantity and combination of austenitizing elements of Chrome and Nickel.

2) There is no martensite start temperature for 316l (kind of a chicken and egg answer, but think about its implications)

3) Martensite is a supersaturated bcc solid solution of carbon in iron. Carbon is too low in these grades to create this supersaturated solution in the first place, let alone transform it diffusionlessly...

Thats my best shot.

Its easy to just say "It can't."

Its a tough sucker to try to explain why, at least this many years away from school.

I'm willing to let someone else take a stab at this.

milo

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