- Other Fasteners[1]
- Angular Contact Ball Bearings[1]
- Deep Groove Ball Bearings[10]
- Other Ball Bearings[2]
- Thrust Ball Bearings[1]
- Other Bearings[2]
- Pillow Block Bearings[2]
- Cylindrical Roller Bearings[1]
- Spherical Roller Bearings[10]
- Taper Roller Bearings[10]
- Special Bearings[10]
- Stainless Steel Pipes[1]
- Steel Pipes[10]
- 100% Polyester Fabric[1]
- 100% Wool Fabric[10]
- Wool/Cashmere Fabric[3]
- Wool/Nylon Fabric[3]
- Wool/Polyester Fabric[1]
GB5310 Seamless steel pipes for high pressure boilers
We are the best manufacturer and merchant in china,and we can supply all kinds of seamless steel pipes.
Standards
GB5310 Chinese national standard
Application
operating temperature below 450 oc)as the pipes on the heated sides of high·pressure boilers,economizers,overheaters,reheaters and pipes
for petrochemical industry(with the operating pressure above 9.8Mpa and operating temperature ranging between 450~C~650~C1
Specifications of major steel
20G,20MnG,25MnG,15CrMoG,12Cr2MoG,12Cr1MoVG,12Cr2MoWVTiB,10Cr9Mo1VNb,
Mechanical properties:
20MnG | ≥415 | ≥240 | ≥22 | / | |
25MnG | ≥485 | ≥275 | ≥20 | / | |
15CrMoG | 440∼640 | ≥235 | ≥21 | / | |
12Cr2MoG | 450∼600 | ≥280 | ≥20 | / | |
12Cr1MoVG | 470∼640 | ≥255 | ≥21 | / | |
12Cr2MoWVTiB | 540∼735 | ≥345 | ≥18 | / | |
10Cr9Mo1VNb | ≥585 | ≥415 | ≥20 | / |
Chemical composition:
GB5310 | 20G | 0.17∼0.24 | 0.17∼0.37 | 0.35∼0.65 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 |
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20MnG | 0.17∼0.24 | 0.17∼0.37 | 0.70∼1.00 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 |
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25MnG | 0.18∼0.24 | 0.17∼0.37 | 0.80∼1.10 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 |
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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 | ≤0.20 | ≤0.30 |
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12Cr2MoG | 0.08∼0.15 | ≤0.50 | 0.40∼0.70 | ≤0.030 | ≤0.030 | 2.00∼2.50 | 0.90∼1.20 | ≤0.20 | ≤0.30 |
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12Cr1MoV | 0.08∼0.15 | 0.17∼0.37 | 0.40∼0.70 | ≤0.030 | ≤0.030 | 0.90∼1.20 | 0.25∼0.35 | ≤0.20 | ≤0.30 | 0.15∼0.30 |
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12Cr2MoWVTiB | 0.08∼0.15 | 0.45∼0.75 | 0.45∼0.65 | ≤0.030 | ≤0.030 | 1.60∼2.10 | 0.50∼0.65 | ≤0.20 | ≤0.30 | 0.28∼0.42 |
| 0.30∼0.55 | 0.08∼0.15 | B 0.002∼0.008 |
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10Cr9Mo1VNb | 0.08∼0.12 | 0.20∼0.50 | 0.30∼0.60 | ≤0.020 | ≤0.010 | 8.00∼9.50 | 0.85∼1.05 | ≤0.20 | ≤0.40 | 0.18∼0.25 | ≤0.015 |
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| 0.06∼0.10 | 0.03∼0.07 |