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              Home - Products -石油裂化用無縫鋼管

              石油裂化用無縫鋼管

              石油裂化用無縫鋼管

              標準:
              GB9948——中國國家標準

              用途:
              用于石油、精煉廠的爐管、熱交換器管和管道用無縫鋼管。

              主要生產鋼管牌號:
              10、20、15CrMo、1Cr2Mo、1Cr5Mo等

              尺寸公差:

              鋼管種類

              外徑(D)

              鋼管壁厚(S)

              冷拔管

              鋼管外徑(mm)

              允許偏差(mm)

              鋼管壁厚 (mm)

              允許偏差(mm)

              >30~50

              ±0.3

              ≤30

              ±10%

              >50~219

              ±0.8%

              熱軋管

              >219

              ±1.0%

              >20

              ±10%

              力學性能:

              標準

              牌號

              抗拉強度(MPa)

              屈服強度(MPa)

              伸長率(%)

              沖擊功(J)

              布氏硬度(HB)

              交貨狀態

              GB9948

              10

              330~490

              ≥205

              ≥24

              /

              /

              正火

              20

              410~550

              ≥245

              ≥21

              ≥39

              /

              正火

              15CrMo

              440~640

              ≥235

              ≥21

              ≥47

              ≤170

              正火加回火

              1Cr2Mo

              ≥390

              ≥175

              ≥22

              ≥92

              ≤179

              正火加回火

              1Cr5Mo

              ≥390

              ≥195

              ≥22

              ≥92

              ≤187

              退火

              化學成分:

              標準

              牌號

              化學成分(%)

              C

              Si

              Mn

              P

              S

              Cr

              Mo

              Ni

              GB9948

              10

              0.07~0.14

              0.17~0.37

              0.35~0.65

              ≤0.035

              ≤0.035

              ≤0.15

              /

              ≤0.25

              20

              0.17~0.24

              0.17~0.37

              0.35~0.65

              ≤0.035

              ≤0.035

              ≤0.25

              /

              ≤0.25

              15CrMo

              0.12~0.18

              0.17~0.37

              0.40~0.70

              ≤0.035

              ≤0.035

              0.80~1.10

              0.40~0.55

              ≤0.30

              1Cr2Mo

              ≤0.15

              0.50~1.00

              0.30~0.60

              ≤0.035

              ≤0.030

              2.15~2.85

              0.45~0.65

              /

              1Cr5Mo

              ≤0.15

              ≤0.50

              ≤0.60

              ≤0.035

              ≤0.030

              4.00~6.00

              0.45~0.60

              ≤0.60

              關鍵詞:

               

               
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