ASTM A743 CA6NM的UNS号为J91540,根据ASME IX QW-420第5段及ASME IX Table QW/QB-422,J91540的P-No.为6,Group No.为4
ASME IX QW-420第5段:If an unlisted base metal has the same UNS number designation as a base metal listed in Table QW/QB-422, that base metal is also assigned that P-Number or P-Number plus Group Number. If the unlisted base metal is used for procedure qualification, the minimum tensile value of the listed base metal shall apply for the tension test specimens.
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