GB/T5312-1999(熱軋 、擠壓、擴管)
尺寸公差外徑(D)≤159>159外徑許可偏差±1.0%(最小為±0.5mm)±1.25%壁厚(S)≤20S>20D≥351壁厚許可偏差+15%,-10%(最小為+0.45mm,-0.30mm)±10%±15%縱向力學性能
種別綱級抗拉強度(MPa)屈服點(MPa)≥延伸率(%)≥碳鋼和碳錳鋼360360-48021524410410-53023522490490-610285211Cr0.5Mo440440-600275222.25Cr1Mo410410-56023520490490-64027516化學成份分類鋼級CSiMnP≤S≤CrMoNiCuSnW總量碳鋼和碳錳鋼360≤0.17≤0.350.40-0.800.0400.040≤0.25≤0.10≤0.30≤0.30--≤0.70410≤0.21≤0.350.40-1.200.0400.040≤0.25≤0.10≤0.30≤0.30--≤0.70440≤0.23≤0.350.80-1.500.0400.040≤0.25≤0.10≤0.30≤0.30--≤0.701Cr0.5Mo4400.10-0.180.10-0.350.40-0.700.0400.0400.70-1.100.45-0.65≤0.30≤0.25≤0.03≤0.020-2.25Cr1Mo4100.08-0.150.10-0.350.40-0.700.0400.0402.00-2.500.90-1.20≤0.30≤0.25≤0.03≤0.020-船泊用管(GB/T5312-1999)網--船泊用管(GB/T5312-1999)詳情--船泊用管(GB/T5312-1999)上一篇:鋼管物流與鋼管生產對企業影響
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