Seamless steel pipes for structures
Standards:
GB/T8162 —— China national standards
ASTM A53 —— American Materials and Testing institution standards
ASME SA53 —— American Boiler and Pressure Vessel norms
Uses:
For the seamless steel pipes for containers, equipment, pipe, mechanical structures
Steel pipes No. of main production:
10、20、35、45、Q345、15CrMo、12Cr1MoV、A53A、A53B、SA53A、SA53B ect.
Dimensional tolerance:
|
Pipe types
|
Outer-caliber（D）
|
Thickness（S）
|
|
|
Pipe outer-caliber(mm)
|
Allowable warp(mm)
|
Pipe thickness(mm)
|
Allowable warp(mm)
|
|
Hot-rolled pipes
|
＞219
|
±1.0％
|
＞20
|
±10％
|
Mechanical Properties:
|
Standards
|
Steel pipes No.
|
Tensile strength（MPa）
|
Bend 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
|
Table View ASTM A53
Table View ASTM SA53
|
|
B
|
≥415
|
≥240
|
Chemical composition:
|
Standards
|
Steel pipes No.
|
Chemical composition（％）
|
|
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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