Temper brittleness of CrMo steel material
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This post was last edited by chenzhen900628 on 2016-3-19 at 15:40. It relates to the 2.25Cr1Mo material and the final heat treatment during equipment manufacturing: cooling in the furnace after reaching 690 degrees, and removing the material from the furnace after reaching 400 degrees. The temperature stays around 400 degrees for about 1.5 hours during this process. Is there any risk of temper brittleness occurring during this stage?
Given that it operates at around 400°C for extended periods of time, one and a half hours is not much – there’s no need to worry too much
There is an impact, but it’s basically negligible.
So for the 2.25Cr-1Mo material now, stepped cooling (step cooling test) is required
That Kazakh standard couldn’t be found, so it was left unfinished