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  1. Filipek144

    Secondary Hardness

    Hello engineers and scientists! Let’s say that I want to achive max hardness of D2 steel after 1050°C. The easiest way is to temper it twice at ~525°C and I should get 63-64 HRC. What if I have already tempered it at 500°C and I couldn’t get more then 61 HRC and I decided to temper it then at...

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