I have a question regarding chromium-molybdenum steel equipment

2016-07-15View Original

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I have recently been studying the design of pressure vessels made of chromium-molybdenum steel. While reviewing a drawing, I came across a set of technical requirements related to forgings. What is the purpose of GB226-1991, \"Test method for microstructure and defect detection of steel by acid etching\"? Additionally, what criteria are used to determine the grade that the results must meet in these technical requirements? Why is it always grade 2? I’m a beginner and really don’t understand it, so I’m asking the experts on the forum for help

Reply #22016-07-15

Is it a macroscopic phase corrosion method?

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I have a question regarding chromium-molybdenum steel equipment

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