पेट्रिलम क्रैकिंग के लिए जीबी / टी 9948 12 सीआरएमओ सीमलेस स्टील ट्यूब

Sort Code

Manufacuring Method

Nominal Size

Tolerances

Common Level

High Level

W-H

Hot Rolling (Extrusion)

Outer Diameter     D

≤54

±0.50

±0.30

＞54~325

±1%D

±0.75%D

＞325

±1%D

-

Wall Thicknass     S

≤20

+15%S

-10%S

±10%S

＞20

+12.5%S

-10%S

±10%S

Hot Expand

Outer Diameter     D

All

±1%D

Wall Thicknass     S

All

±15%S

W-C

Cold Drawn(Rolling)

Outer Diameter     D

≤25.4

±0.15

＞25.4~40

±0.20

＞40~50

±0.25

＞50~60

±0.30

＞60

±0.75%D

±0.5%D

Wall Thicknass     S

≤3.0

±0.3

±0.2

＞3.0

±10%S

±7.5%S

Steel grade

Chemical composition %

C

Si

Mn

Cr

Mo

Ni

Nb

Ti

V

Cu

P

S

≤

10

0.07~

0.13

0.17~

0.37

0.35~

0.65

≤0.15

≤0.15

≤

0.25

-

-

≤0.08

≤0.20

0.025

0.015

20

0.17~

0.23

0.17~

0.37

0.35~

0.65

≤0.25

≤0.15

≤

0.25

-

-

≤0.08

≤0.20

0.025

0.015

12CrMo

0.08~

0.15

0.17~

0.37

0.40~

0.70

0.40~

0.70

0.40~

0.55

≤

0.30

-

-

-

≤0.20

0.025

0.015

15CrMo

0.12~

0.018

0.17~

0.37

0.40~

0.70

0.80~

1.10

0.40~

0.55

≤

0.30

-

-

-

≤0.20

0.025

0.015

12CrlMo

0.08~

0.15

0.50~

1.00

0.30~

0.60

1.00~

1.50

0.45~

0.65

≤

0.30

-

-

-

≤0.20

0.025

0.015

12CrlMoV

0.08~

0.15

0.17~

0.37

0.40~

0.70

0.90~

1.20

0.25~

0.35

≤

0.30

-

-

0.15~

0.30

≤0.20

0.025

0.015

12Cr2Mo

0.08~

0.15

≤0.50

0.40~

0.60

2.00~

2.50

0.90~

1.13

≤

0.30

-

-

-

≤0.20

0.025

0.015

12Cr5MoI

12Cr5MoNT

≤

0.15

≤0.50

0.30~

0.60

4.00~

6.00

0.45~

0.60

≤

0.60

-

-

-

≤0.20

0.025

0.015

12Cr9MoI

12Cr9MoNT

≤

0.15

0.25~

1.00

0.30~

0.60

8.00~

10.00

0.90~

1.10

≤

0.60

-

-

-

≤0.20

0.025

0.015

07Cr19Ni10

0.04~

0.10

≤

1.00

≤2.00

18.00~

20.00

-

8.00~

11.00

-

-

-

-

0.030

0.015

07Cr18Ni11Nb

0.04~

0.10

≤

1.00

≤2.00

17.00~

19.00

-

9.00~

12.00

8C~

1.10

-

-

-

0.030

0.015

07Cr19Ni11NTi

0.04~

0.10

≤0.75

≤2.00

17.00~

20.00

-

9.00~

13.00

-

4C~

0.60

-

-

0.030

0.015

022Cr17Ni12Mo2

≤

0.30

≤1.00

≤2.00

16.00~

18.00

2.00~

3.00

10.00~

14.00

-

-

-

-

0.030

0.015