seamless steel tubes for construction

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Loading Port:
Shanghai
Payment Terms:
TT OR LC
Min Order Qty:
2000 m.t.
Supply Capability:
10000 m.t./month

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Product Description:

Product Description:

Standards:
GB,_r81 62 Chinese national standard
ASTM A53 Standard of American Society of Testing Materials
ASME SA53 Boiler and pressure vessel--c-Ojrde of ASME
Application:
Seamless steel tubes for manufacturing pipelines。vessels,equipment and mechanical structures
Models of major steeI tubes:
1 O,20,35、45,Q345,1 5CrMo,1 2Crl MoV,A53A,A53B,SA53A,SA53B, etc.

Diamensional tolerances:

Types of steel tubes

Outer diameter

Wall thickness

Cold-rolled tubes

Tube sizes(mm)

Tolerances(mm)

Tube sizes (mm)

Tolerances(mm)

>30~50

±0.3

≤30

±10%

>50~219

±0.8%

Hot-rolled tubes

>219

±1.0%

>20

±10%

Mechanical properties:

Standard codes

Models of steel tubes

Tensite strength(MPa)

Yield strength(MPa)

Elongation(%)

GB/T8162

10

≥335

≥205

≥24

20

≥390

≥245

≥20

35

≥510

≥305

≥17

45

≥590

≥335

≥14

Q345

≥490

≥325

≥21

15CrMo

≥440

≥295

≥22

12Cr1MoV

≥490

≥245

≥22

ASTM A53

ASME SA53

A

≥330

≥205

Check the table in ASTM A 53
Check the table in ASME SA53

B

≥415

≥240

Chemical composition:

Standard codes

Models of steel tubes

Chemical compositions(%)

C

Si

Mn

P

S

Cu

Ni

Mo

Cr

V

GB/T8162

10

0.07~0.14

0.17~0.37

0.35~0.65

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.15

/

20

0.17~0.24

0.17~0.37

0.35~0.65

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25

/

35

0.32~0.40

0.17~0.37

0.50~0.80

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25

/

45

0.42~0.50

0.17~0.37

0.50~0.80

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25

/

Q345

0.12~0.20

0.20~0.55

1.20~1.60

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25

/

15CrMo

0.12~0.18

0.17~0.37

0.40~0.70

≤0.035

≤0.035

≤0.25

≤0.30

0.40~0.55

0.80~1.10

/

12Cr1MoV

0.08~0.15

0.17~0.37

0.40~0.70

≤0.035

≤0.035

≤0.25

≤0.30

0.25~0.35

0.90~1.20

0.15~0.30

ASTMA53

ASMESA53

A

≤0.25

/

≤0.95

≤0.05

≤0.06

≤0.40

≤0.40

≤0.15

≤0.40

≤0.08

B

≤0.30

/

≤1.20

≤0.05

≤0.06

≤0.40

≤0.40

≤0.15

≤0.40

≤0.08


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