Difference between High-temperature strength Value in Steel 1.2581& 1.2344?

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Vadim Verlotski

Steel 1.2344 has a maximum of 56 HRC at 500°C (2050 MPa): https://www.otaisteel.com/products/hot-work-tool-steel/1-2344-hot-work-alloy-tool-steel/

Steel 1.2581 has a maximum of 62 HRC at 500°C (2200 MPa): https://www.otaisteel.com/products/hot-work-tool-steel/h21/

Hamid Jafari

Thank you, Daer Vadim.

Thank you very much for your answer.

What is the best book or Reference to find the mechanical properties of steels at high temperatures?