1. API 5L: Grade A, Grade B, X42, X46, X52, X56, X60, X65, X70, X80 2. ASTM A 53: Grade A, Grade B, Grade C, Type F, Type E 3. ASTM A519: 1010-1045, 4130-4142, 5135 4. GB/T8162: 10, 20, 35, 45, 16Mn, ... ...
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