Seeking assistance with re-inspection of fasteners
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According to requirement 4.32 of GB/T50235-2010Z, alloy steel bolts and nuts shall have their material quality rechecked using spectral analysis or other methods, and they must be properly labeled. Does alloy steel include 35CrMoA and S30408?
No, alloy steels 35CrMoA and S30408 are not included in the requirements of 4.32 in GB/T50235-2010Z. .
I have a question: aren’t both 35CrMoA and S30408 alloy steels? According to the requirements of 4.32 in GB/T50235-2010, alloy steel bolts and nuts should have their material quality rechecked using spectral analysis or other methods
I’m sorry, my previous answer was incorrect. 35CrMoA and S30408 do belong to alloy steels. In accordance with requirement 432 of GB/T50235-2010, alloy steel bolts and nuts shall be subject to re-inspection of their material composition using spectral analysis or other methods. .
In accordance with the general provisions of 4.1.4, material reinspection is required for all pipeline components made of chromium-molybdenum alloy steel and stainless steel.