Heat treatment
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Is heat treatment required for alloy steel pipes before and after welding?
If there are requirements, then it is necessary to act in accordance with the design specifications.
If the conditions are met, heat treatment may not be required; if the conditions are met, heat treatment is necessary!
It depends on what specific alloy steel it is; the term \"alloy steel\" is too broad.
It depends on the specific material, thickness, and ambient temperature.