ASTM-A131 ship structural steel A131-A,A131-B,A131-D,A131-E,A131-CS.
ASTM-A131 ship structural steel specifications, including the general ship structural steel,A131-A,A131-B,A131-D,A131-E,A131-CS;
High-strength ship structural steel:A131-AH32,A131-DH32,A131-EH32,A131-FH32,A131-AH36,A131-DH36,A131-EH36,A131-FH36,A131-AH40,A131-DH40,A131-EH40,A131-FH40.
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