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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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