与B级要求一样16Mn精密钢管提供S、P、C、Mn、Si化学成分
- (745) 840 84.1 - 65.3 74.8 91 -
- (733) 820 83.8 - 64.7 74.3 90 -
- (722) 800 83.4 - 64.0 73.8 88 -
- (712) - - - - - - -
- (710) 780 83.0 - 63.3 73.3 87 -
- (698) 760 82.6 - 62.5 72.6 86 -
- (684) 740 82.2 - 61.8 72.1 - -
- (682) 737 82.2 - 61.7 72.0 84 -
- (670) 720 81.8 - 61.0 71.5 83 -
- (656) 700 81.3 - 60.1 70.8 - -
- (653) 697 81.2 - 60.0 70.7 81 -
- (647) 690 81.1 - 59.7 70.5 - -
- (638) 680 80.8 - 59.2 70.1 80 -
- 630 670 80.6 - 58.8 69.8 - -
- 627 667 80.5 - 58.7 69.7 79 -
- - 677 80.7 - 59.1 70.0 - -
- 601 640 79.8 - 57.3 68.7 77 -
- - 640 79.8 - 57.3 68.7 - -
- 578 615 79.1 - 56.0 67.7 75 -
- - 607 78.8 - 55.6 67.4 - -
- 555 591 78.4 - 54.7 66.7 73 2055
- - 579 78.0 - 54.0 66.1 - 2015
- 534 569 77.8 - 53.5 65.8 71 1985
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