Stainless steel 440C

[12756]

What hardness can be expected after nitriding? Need to improve on an existing hardness of 58HRC.

What would the nitrided depth be?

Effect of nitriding on corrosion?

Thanks.

 

[swall]

You can obtain a surface hardness approaching Rc 65, as measured with a test file. Depth depends on the type of nitriding--gas, salt or ion. With gas, .010" case is typical, with salt, .001" is typical. Ion can cover both of these ranges. Nitriding on carbon or low alloy steel will improve resistance to atmospheric corrosion; the opposite is true with nitrided stainless.

 

[EdStainless]

There are other ways to surface harden this alloy also. One is forming TiC on the surface using C from the alloy. I have seen this done on curring blades.

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