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发表于 2017-4-29 19:50:38
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按ASME IX评定的Q235B的WPS不能用于SS400的焊接。
根据ASME QW-424.1的规定,Q235B和SS400都是Unassigned Metals。在QW-424.1的表中,任何Unassigned Metal与相同的Unassigned Metal的工艺评定只能覆盖该Unassigned Metal与该Unassigned Metal的焊接。因此Q235B的工艺评定只能覆盖Q235B的焊接,不能覆盖SS400的焊接。
ASME IX QW-424.1 Base metals are assigned P-Numbers in Table QW/QB-422; metals that do not appear in Table QW/QB-422 are considered to be unassigned metals except as otherwise defined for base metals having the same UNS numbers. Unassigned metals shall be identified in the WPS and on the PQR by specification, type and grade, or by chemical analysis and mechanical properties. The minimum tensile strength shall be defined by the organization that specified the unassigned metal if the tensile strength of that metal is not defined by the material specification.
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