Seamless steel pipes for highpressure chemical fertilizer processing equipment
Standards:
GB6479 —— China national standards
Uses:
For the Seamless steel pipes for highpressure chemical fertilizer processing equipment
Steel pipes No. of main production:
10¡¢20¡¢16Mn¡¢10MoWVNb¡¢15CrMo¡¢1Cr5Mo¡¢12 Cr2Mo 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
|
£¾219
|
±1.0£¥
|
£¾20
|
±10£¥
|
Mechanical Properties:
|
Standards
|
Steel pipes No.
|
Tensile strength£¨MPa£©
|
Bend strength£¨MPa£©
|
Elongation£¨£¥£©
|
Impact energy£¨J£©
|
Low temperature Impact Akv
|
|
GB6479
|
10
|
335¡«490
|
≥205
|
≥24
|
/
|
£20¡æ≥18
|
|
20
|
410¡«550
|
≥245
|
≥24
|
≥39
|
£20¡æ≥18
|
|
16Mn
|
490¡«670
|
≥320
|
≥21
|
≥47
|
£40¡æ≥21
|
|
10MoWVNb
|
470¡«670
|
≥295
|
≥19
|
≥62
|
|
|
15CrMo
|
440¡«640
|
≥235
|
≥21
|
≥47
|
|
|
1Cr5Mo
|
390¡«590
|
≥195
|
≥22
|
≥94
|
|
|
12 Cr2Mo
|
450¡«600
|
≥280
|
≥20
|
≥38
|
|
Chemical composition:
|
Standards
|
Steel pipes No.
|
Chemical composition£¨£¥£©
|
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
Ni
|
|
GB
6479
|
10
|
0.07¡«0.14
|
0.17¡«0.37
|
0.35¡«0.65
|
≤0.030
|
≤0.030
|
/
|
/
|
/
|
|
20
|
0.17¡«0.24
|
0.17¡«0.37
|
0.35¡«0.65
|
≤0.030
|
≤0.030
|
/
|
/
|
/
|
|
16Mn
|
0.12¡«0.20
|
0.20¡«0.60
|
1.20¡«1.60
|
≤0.030
|
≤0.030
|
|
|
|
|
10MoWVNb
|
0.07¡«0.13
|
0.50¡«0.80
|
0.50¡«0.80
|
≤0.030
|
≤0.030
|
/
|
0.60¡«0.90
|
/
|
|
15CrMo
|
0.12¡«0.18
|
0.17¡«0.37
|
0.40¡«0.70
|
≤0.030
|
≤0.030
|
0.80¡«1.10
|
0.40¡«0.55
|
/
|
|
1Cr5Mo
|
≤0.15
|
≤0.50
|
≤0.60
|
≤0.030
|
≤0.030
|
4.00¡«6.00
|
0.45¡«0.60
|
≤0.60
|
|
12 Cr2Mo
|
0.80¡«0.15
|
≤0.50
|
0.40¡«0.70
|
≤0.030
|
≤0.030
|
2.0¡«2.50
|
0.90¡«1.20
|
|
Ps:The residual element content of 10 is Ni≤0.25£¥¡¢Cr≤0.15£¥¡¢Cu≤0.20£¥
The residual element content of 20 is Ni≤0.25£¥¡¢Cr≤0.25£¥¡¢Cu≤0.20£¥¡¢Mo≤0.15£¥¡¢V≤0.08£¥
The residual element content of other is Ni≤0.30£¥¡¢Cr≤0.30£¥¡¢Cu≤0.20£¥
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