Treatment methods for 630 stainless steel valve stems

2016-05-26View Original

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Does anyone know whether, for valve stems made of 630 stainless steel, it is better to use forged material (per A705 standard) or hot-rolled material (per A564 standard), and which option has a higher cost?

Reply #22016-05-26

630 stainless steel is the same as 17-4PH material. Hot rolling is sufficient; it must be heat-treated in accordance with the specifications for H1150, to achieve a hardness of ≤HRC33, and σb ≥ 930 MPa, σs ≥ 725 MPa

Reply #32016-05-26

I’m not sure; for reference only

Reply #42016-05-26

For the heat treatment method, I see that the manufacturer has chosen H1150X2. I couldn’t find this notation in the standards, so I’m not sure what it means

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Treatment methods for 630 stainless steel valve stems

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