What are the X and J parameters in the manufacturing technical specifications for hydrogen-service steel plates of 12Cr2Mo1R (H)?
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In this specification, the X parameter and the J parameter are parameters used to measure what kind of performance
Where can I find the manufacturing technical specifications for 12Cr2Mo1R (H) hydrogen-service steel plates?
It is mainly used to control the tendency of temper embrittlement. The method is to control purity
Files with screenshots taken from Baidu on the internet are not very complete. Can be used as a reference
Arsenic, phosphorus, tin, and lead are factors affecting temper embrittlement
The J coefficient is applicable to steel plates, while the X coefficient is applicable to welding materials and welds; both are used to assess the temper brittleness of high CrMo steel. Currently, the X coefficient, J coefficient, and step cooling test are the main indicators for measuring and controlling the temper brittleness of high CoMo steel. Generally, the J coefficient can be specified to the material manufacturer when ordering the sheet metal; different requirements for the J coefficient may affect the price of the material. The X coefficient is controlled by the manufacturing factory, while the step cooling test is carried out by the factory based on specimens designed to simulate post-weld heat treatment conditions as well as those required for experiments.