机械结构用不锈钢焊接钢管 (GB/T12700-1991)(1) 尺寸和允许偏差 6-131
(2) 牌号和化学成分 6-132
(3) 力学性能 6-133 ? 6-134
(4) 用途是用于制造机械，汽车，自行车，装饰及其他机械部件与结构件
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0.3mmGB/T12770-1991
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钢管尺寸允许偏差
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牌号
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化学成分（质量分数） (%)
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C
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Si
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Mn
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P
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S
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Ni
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Cr
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其他
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00Cr19Ni11
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≤0.030
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≤1.00
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≤2.00
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≤0.035
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≤0.030
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9.00-13.00
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18.00-20.00
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-
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00Cr17Ni14Mo2
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≤0.030
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≤1.00
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≤2.00
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≤0.035
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≤0.030
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12.00-15.00
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16.00-18.00
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Mo2.00-3.00
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0Cr19Ni9
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≤0.08
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≤1.00
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≤2.00
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≤0.035
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≤0.030
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8.00-10.00
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18.00-20.00
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-
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1Cr19Ni9
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≤0.15
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≤1.00
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≤2.00
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≤0.035
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≤0.030
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8.00-10.00
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17.00-19.00
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-
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(1CR18Ni9Ti)
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≤0.12
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≤1.00
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≤2.00
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≤0.035
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≤0.030
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8.00-11.00
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17.00-19.00
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Ti5(C%-0.02)-0.80
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0Cr17Ni12Mo2
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≤0.08
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≤1.00
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≤2.00
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≤0.035
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≤0.030
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10.00-14.00
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16.00-18.00
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Mo2.00-3.00
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0Cr18Ni11Nb
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≤0.08
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≤1.00
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≤2.00
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≤0.035
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≤0.030
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9.00-13.00
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17.00-19.00
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Nb≥10xC%
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0Cr25Ni20
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≤0.08
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≤1.50
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≤2.00
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≤0.035
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≤0.030
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19.00-22.00
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24.00-26.00
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-
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1Cr17
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≤0.12
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≤0.75
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≤1.00
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≤0.035
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≤0.030
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-
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16.00-19.00
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Ti 或Nb0.10-1.00
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1Cr15
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≤0.12
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≤1.00
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≤1.00
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≤0.035
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≤0.030
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-
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16.00-18.00
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-
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0Cr13
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≤0.08
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≤1.00
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≤1.00
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≤0.035
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≤0.030
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-
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11.50-13.50
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-
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1Cr13
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≤0.15
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≤1.00
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≤1.00
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≤0.035
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≤0.030
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-
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11.50-13.50
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-
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