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Hi shu60, Part size is around 50mm. It sits in a larger stainless steel 304 part, but has to engage with a non-stainless steel counterpart. Hardness of this counter part is around 30HRC. Some limited sliding between these parts can occur. No surface coatings, and practically no lubrication...

Hi MJCronin, Thanks for your quick reply. The part concerned can be described best as a sort of latch. Part of the latch is operated by hand and the contact surface develops some superficial rust. Also, the part is rather exposed in the application and we want to be able to extend its use to...

Hi all, A certain part is currently made from 42CrMo4 low-alloy steel. It performs well in terms of mechanical strength, wear, impact resistance etc. However, I've been asked to find a stainless alternative to 42CrMo4. What would be a good alternative? 17-4PH with a H1050 HT, or 420 or 431...