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GB/T5310化学元素允许偏差【天津大无缝钢管厂】


天津大无缝钢管厂提供信息成品化学成分允许偏差
元素
                规定的熔炼化学成分
                             上限值                                 允许偏差,%
                               
                                                        上偏差                    下偏差
                                                                                    
 C                      ≤027                       0.01                    0.01
                                                   
Si                     ≤0.37                      0.02                     0.02
                  >0.37~1.00               0.04                          0.04                                    

Mn                  ≤1.00                       0.03                      0.03
                       >1.00-2.00                  0.04                   0.04

P                     ≤0.025                         0.005                          -


S                     ≤0.015                      0.05                         -


Cr                     ≤1.00                        0.05              0.05
                        >1.00-10.00             0.10                     0.10
                   >     10.00-15.00                0.15               0.15
                        >15.00 -26.00               0.20                 0.20

                              Mo≤   0.35            0.03                0.03
                           >   0.35-1.20                 0.04              0.04


V                            ≤   0.10                      0.01                    -
                        >    0.10-0.42                    0.03                 0.03


Ti                             ≤  0.01                        0                       -
                            >0.01-0.38                       0.01               0.01


Ni                           ≤  1.00                         0.03                 0.03
                         >   1.00-1.30                      0.05                   0.05
                      >    1.3-10.00                        0.10                  0.10
                    >     10.00-22.00                      0.15                    0.15


Nb                ≤  0.10                               0.005                   0.005
                 >   0.10-1.10                         0.05                       0.05


W                     ≤   1.00                  0.04                          0.04
                     >  1.00-2.5                    0.08                         0.08


Cu                ≤1.00                          0.05                                0.05
                     >1.00-3.50                   0.10                            0.10


Al                ≤  0.050                          0.005                      0.005


B                 ≤   0.0050                     0.0005                      0.0001
                 >0.005-0.0110                    0.0010                   0.0003


N                   ≤0.100                       0.005                         0.005
                  >0.100-0.350                    0.010                       0.010


Zr                     ≤0.01                            0                                -


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