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PWHT for 422HT

PWHT for 422HT

PWHT for 422HT

(OP)
Why can I not find a PWHT for 422HT or a P-no?

RE: PWHT for 422HT

There is no P-No specific to Type 422 stainless because it is a higher temperature version of Type 410 stainless steel (P-No 6). In other words, it contains alloying elements that allow it to be used at higher service temperatures in comparison to Type 410 stainless steel.

The PWHT for Type 422 would parallel that for Type 410 stainless steel.

RE: PWHT for 422HT

(OP)
thanks metengr

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