Seamless steel pipes for transmission of fluids
Standards:
GB/T8163 —— China national standards
Uses:
For the seamless steel pipes for transmission of fluids
Steel pipes No. of main production:
10¡¢20¡¢Q345 ect.
Dimensional tolerance:
|
Pipe types
|
Outer-caliber£¨D£©
|
Thickness£¨S£©
|
|
|
Pipe outer-caliber(mm)
|
Allowable warp(mm)
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Pipe thickness(mm)
|
Allowable warp(mm)
|
|
Hot-rolled pipes
|
£¾219
|
±1.0£¥
|
£¾20
|
±10£¥
|
Mechanical Properties:
|
Standards
|
Steel pipes No.
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Tensile strength£¨MPa£©
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Bend strength£¨MPa£©
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Elongation£¨£¥£©
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|
GB/T8163
|
10
|
335¡«475
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≥205
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≥24
|
|
20
|
410¡«550
|
≥245
|
≥20
|
|
Q345
|
490¡«665
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≥325
|
≥21
|
Chemical composition:
|
Standards
|
Steel pipes No.
|
Chemical composition£¨£¥£©
|
|
C
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Si
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Mn
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P
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S
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Cr
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Ni
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Cu
|
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GB/T8163
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10
|
0.07¡«0.14
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0.17¡«0.37
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0.35¡«0.65
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≤0.035
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≤0.035
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≤0.15
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≤0.25
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≤0.25
|
|
20
|
0.17¡«0.24
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0.17¡«0.37
|
0.35¡«0.65
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≤0.035
|
≤0.035
|
≤0.25
|
≤0.25
|
≤0.25
|
|
Q345
|
0.12¡«0.20
|
0.20¡«0.55
|
1.20¡«1.60
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≤0.045
|
≤0.045
|
/
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/
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/
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