Material help !!!! High hardness - non ferous material???

[mrkoko]

I am looking for a material to try and suit all of my customers specs. They would like to see something non-ferrous which can be hardened to Rc-60. I don't think anything like this exists (and is readily available) so I am trying to come up with the next best thing. Any ideas? I thought about 440c stainless but it's magnetic, or AMPC0-25 gets me Rc40 ish I think.

 

[israelkk]

Ceramics

 

[mrkoko]

Hmmm I hadn't thought of that but I don't think it will work in my case. The parts I need to make are going in some weld tooling. Can you machine ceramics the same was you can a metal? (I'm not sure if that a dumb question or not)

 

[metengr]

mrkoko;
Why do you need this hardness for weld tooling? Do you just need surface hardness at 60 HRc?

 

[sreid]

Macor Ceramic-Don't know the hardness.

http://www.morganadvancedceramics.com/materials/macor.htm?gclid=CK2k4bqZ844CFQzCYgodnyIcEQ

 

[sreid]

For high hardness stainless, see Kolsterising.

http://www.kolsterising.bodycote.com/

 

[sreid]

317 SS has very low permeability (scroll to bottom of link)

http://www.sandmeyersteel.com/317LMN.html#1

 

[CoryPad]

Anodizing on aluminium alloys can approach that hardness level.

A better bet would be a titanium alloy that has the surface hardened (e.g. nitrogen diffusion hardening, diamond-like coating, etc.).

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[swall]

Do you have the option of hard chrome plating? If you do, you could plate the Ampco 25. Hard chrome is well in excess of Rc 60.

 

[EdStainless]

If you need bulk harness look at Brush Wellman. My favorite is Be-Ni, but there are a bunch of age hardening Cu bassed alloys that will get you close.

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Still trying to help you stop corrosion.
formerly Trent Tube, now Plymouth Tube
eblessman@plymouth.com
or edstainless@earthlink.net

 

[mrkoko]

Thanks for all your responses! I'm going to see if my customer will budge on any of there specs so I can use a more basic material. I only need the high hardness in weld tooling because my customer requires it. It has to be non ferrous so it will not affect the weld schedule.