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Home - Products -高壓化肥設備用無縫鋼管

高壓化肥設備用無縫鋼管

高壓化肥設備用無縫鋼管

標準:
GB6479——中國國家標準

用途:
用于高壓化肥設備和管道用無縫鋼管。
主要生產鋼管牌號:
10、20、16Mn、10MoWVNb、15CrMo、1Cr5Mo、12 Cr2Mo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)

低溫沖擊Akv

GB6479

10

335~490

≥205

≥24

/

-20℃≥18

20

410~550

≥245

≥24

≥39

-20℃≥18

16Mn

490~670

≥320

≥21

≥47

-40℃≥21

10MoWVNb

470~670

≥295

≥19

≥62

 

15CrMo

440~640

≥235

≥21

≥47

 

1Cr5Mo

390~590

≥195

≥22

≥94

 

12 Cr2Mo

450~600

≥280

≥20

≥38

 

化學成分:

標準

牌號

化學成分(%)

C

Si

Mn

P

S

Cr

Mo

Ni

GB

6479

10

0.07~0.14

0.17~0.37

0.35~0.65

≤0.030

≤0.030

/

/

/

20

0.17~0.24

0.17~0.37

0.35~0.65

≤0.030

≤0.030

/

/

/

16Mn

0.12~0.20

0.20~0.60

1.20~1.60

≤0.030

≤0.030

 
 
 

10MoWVNb

0.07~0.13

0.50~0.80

0.50~0.80

≤0.030

≤0.030

/

0.60~0.90

/

15CrMo

0.12~0.18

0.17~0.37

0.40~0.70

≤0.030

≤0.030

0.80~1.10

0.40~0.55

/

1Cr5Mo

≤0.15

≤0.50

≤0.60

≤0.030

≤0.030

4.00~6.00

0.45~0.60

≤0.60

12 Cr2Mo

0.80~0.15

≤0.50

0.40~0.70

≤0.030

≤0.030

2.0~2.50

0.90~1.20

 

注:其中10的殘余元素含量Ni≤0.25%、Cr≤0.15%、Cu≤0.20%
20的殘余元素含量Ni≤0.25%、Cr≤0.25%、Cu≤0.20%、Mo≤0.15%、V≤0.08%
其他的殘余元素含量Ni≤0.30%、Cr≤0.30%、Cu≤0.20%

 
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