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Seamless steel pipe

Standard:
API SPEC 5L - American Petroleum Institute Standard
GB/T9711.2-- Chinese National Standard
Uses: used in oil and gas industry, oxygen, water, oil pipeline
The main production steel grade: B, X42, X52, X60, X65, X70
Tolerance:

Steel Type

Pipe diameter (D)

Pipe wall thickness (S)

Tube

Pipe diameter (mm)

千禧彩票娱乐Tolerance(mm)

Pipe diameter(mm)

Tolerance(mm)

≥60.3且S<20

±0。75%

≤73。0

+15%,-12.5%

≥60。3且S≥20

±1。00%

>73.0且S<20

+15%,-12.5%

 

 

>73。0且S≥20

+17。5%,-10

Mechanical Properties:

Standard

Trademark

Tensile strength(MPa)

Yield Strength (MPa)

Yield ratio

Elongation (%)

0 ℃ impact energy
Akv(J)

Heat treatment

API SPEC 5L
千禧彩票娱乐 GB/T9711.2

B

≥415

245~440

≤0.80

22

≥40

Normalizing

X42

≥415

290~440

≤0.80

21

≥40

Normalizing

X52

≥460

360~510

≤0。85

20

≥40

Normalizing

X60

≥520

415~565

≤0.85

18

≥40

Normalizing

X65

≥535

450~570

≤0。90

18

≥40

Quenching and tempering

X70

≥570

485~605

≤0。90

18

≥40

Quenching and tempering

Chemical composition:

Standard

Trademark

Chemical composition(%)

CEV(%)

C

Si

Mn

P

S

V

Nb

Ti

API SPEC 5L
GB/T9711.2

B

≤0.16

≤0.40

≤1.10

≤0.020

≤0.010

≤0。42

X42

≤0。17

≤0.40

≤1.20

≤0。020

≤0.010

≤0.05

≤0.05

≤0.04

≤0.42

X52

≤0。20

≤0.45

≤1。60

≤0。020

≤0.010

≤0.10

≤0.05

≤0.04

≤0.45

X60

≤0。21

≤0.45

≤1.60

≤0.020

≤0.010

≤0.15

≤0.05

≤0。04

Agreement

X65

≤0.16

≤0。45

≤1.60

≤0.020

≤0。010

≤0.06

≤0。05

≤0.06

≤0.45

X70

≤0.16

≤0.45

≤1.70

≤0.020

≤0。010

≤0。06

≤0.05

≤0。06

≤0。45

 
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