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  1. zx200driver

    8620 vs 4320 given case depth and cross section

    Hi. I'm looking for opinions for a material specification. We have a part that is likely to be manufactured out of 4320H, gas carburized. (8620H is only alternative available). The case depth (50 HRc) requirement is a minimum of .080". Yes, this part must be tough and able to withstand...

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