431 SUS Steel Round Pipe

To ensure the performance of 431 SUS Steel Round Pipe during manufacturing, it is crucial to control the following process parameters:

: Proper annealing, hardening, and tempering processes are essential. Full annealing isn't practical for this grade; process annealing at 620-660 degree followed by air cooling is recommended. Hardening is done at 980-1065 degree , followed by quenching in oil or air .

: The material should be hardened to achieve a specified hardness level, typically around 40HRC .

: Ensure the tensile strength is within the specified range, typically 850-1000 MPa for "Condition T" .

: The 0.2% yield strength should meet the minimum requirement, usually around 635 MPa .

: Maintain adequate ductility, with elongation typically not less than 10-15% .

: Due to the risk of cracking, welding should be done with preheating and post-weld heat treatment .

431 SUS Stainless Steel Pipe

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