- Other Bearings[9]
- Other Roller Bearings[7]
- Taper Roller Bearings[10]
- Cylindrical Roller Bearings[10]
- Spherical Roller Bearings[10]
- Deep Groove Ball Bearings[7]
- Pillow Block Bearings[7]
- Angular Contact Ball Bearings[1]
- Other Ball Bearings[2]
- Special Bearings[2]
- 100% Wool Fabric[6]
- Wool/Nylon Fabric[1]
- Stainless Steel Pipes[1]
- Steel Pipes[6]
- Contact Person : Mr. TAO LONG
- Company Name : Liaocheng Kaifa International Trade Co., Ltd.
- Tel : 86-635-8517456,2187456
- Fax : 86-635-8517997
- Address : Shandong,Liaocheng,No.4 Huangshan north road, Liaocheng development zone,china
- Country/Region : China
- Zip : 252000
GB6479 Seamless steel pipes
StandardGB6479 Chinese national standardApplicationSeamless steel tubes for high-pressure chemical fertilizer processing equipment and pipelines thereofModel No.of steel tubes10,20,16Mn,10MoWVNb,15CrMo,1Cr5Mo,12 Cr2Mo,etc
Diamensional tolerances:
Types of steel tubes | Outer diameter | Wall thickness | ||
Cold-rolled tubes | Tube sizes(mm) | Tolerances(mm) | Tube sizes (mm) | Tolerances(mm) |
3050 | ±0.3 | ≤30 | ±10 | |
Mechanical porperties:
|
| MPa | MPa |
| J | Akv |
GB6479 | 10 | 335490 | ≥205 | ≥24 | / | 20≥18 |
20 | 410550 | ≥245 | ≥24 | ≥39 | 20≥18 | |
16Mn | 490670 | ≥320 | ≥21 | ≥47 | 40≥21 | |
10MoWVNb | 470670 | ≥295 | ≥19 | ≥62 | ||
15CrMo | 440640 | ≥235 | ≥21 | ≥47 | ||
1Cr5Mo | 390590 | ≥195 | ≥22 | ≥94 | ||
12 Cr2Mo | 450600 | ≥280 | ≥20 | ≥38 | ||
Chemical composition:
Standard codes | Models of steel tubes | Chemical compositions | |||||||
C | Si | Mn | P | S | Cr | Mo | Ni | ||
GB 6479 | 10 | 0.070.14 | 0.170.37 | 0.350.65 | ≤0.030 | ≤0.030 | / | / | / |
20 | 0.170.24 | 0.170.37 | 0.350.65 | ≤0.030 | ≤0.030 | / | / | / | |
16Mn | 0.120.20 | 0.200.60 | 1.201.60 | ≤0.030 | ≤0.030 | ||||
10MoWVNb | 0.070.13 | 0.500.80 | 0.500.80 | ≤0.030 | ≤0.030 | / | 0.600.90 | / | |
15CrMo | 0.120.18 | 0.170.37 | 0.400.70 | ≤0.030 | ≤0.030 | 0.801.10 | 0.400.55 | / | |
1Cr5Mo | ≤0.15 | ≤0.50 | ≤0.60 | ≤0.030 | ≤0.030 | 4.006.00 | 0.450.60 | ≤0.60 | |
12 Cr2Mo | 0.800.15 | ≤0.50 | 0.400.70 | ≤0.030 | ≤0.030 | 2.02.50 | 0.901.20 | ||
NOTEthe residual contents of the elements for the steel 10:Ni≤0.25Cr≤0.15Cu≤0.20the residual contents of the elements for the steel 20:Ni≤0.25Cr≤0.25Cu≤0.20Mo≤0.15V≤0.08the residual contents of the elements for the steel Ni≤0.30Cr≤0.30Cu≤0.20
GB6479 Seamless steel pipes
