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Old 4th April 2020
Ireeman's Avatar
Ireeman Ireeman is offline
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Join Date: Jul 2008
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Sportster/Buell Model: 883r
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Quote:
Originally Posted by Steve9 View Post
17-4, 17-7 may be heat treated up to 50+ rockwell "C"

none of the 300 series, 304, 316 etc, can be hardened.

All the 400 series rusts just like mild steel

I made a bunch of surgical prototypes last year and we tried 301 high yield which has the highest ksi of any cold-worked stainless, ended up with 17-7 machined condition C, treated to rockwell 53. Gave us the most memory.

These were for a knee-replacement system. Probably overkill for our purposes
Cobalt Chrome was knee replacement, bit of a teething problem with it at first , Has to be isolated with Peek plastic, or necrosis.

That said, it is way too brittle for vehicle and cost prohibitive.
17-4 in larger diameters harden well for vehicles or vessels.
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