Technical Specifications
Executive Standards
- GB/T 8162-2018 - Seamless steel pipes for structural applications
- GB/T 8163-2018 - Seamless pipes for fluid transportation
- GB/T 3087-2018 - Medium and Low-Pressure Boiler Tubes
- GB/T 5310-2018 - Seamless steel pipes for high-pressure boilers
- GB/T 6479-2018 - Seamless Steel Pipes for High-Pressure Fertilizer Equipment
- GB/T 9948-2018 - Seamless steel pipes for petrochemical and chemical equipment
Dimensions & Tolerances
Outer Diameter
Same as seamless pipe
Wall Thickness
Same as seamless pipe
Tolerance
Same as seamless pipe standard
Chemical Composition
| Grade | C | Yes | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|---|
| 15CrMo | 0.12-0.18% | 0.17-0.37% | 0.4-0.7% | ≤0.025% | ≤0.015% | 0.8-1.1% | 0.4-0.55% |
| 42CrMo | 0.38～0.45% | 0.90～1.20% | 0.15～0.25% | ||||
| Page 9 | ≤0.15% | 8.00～10.00% | 0.90～1.10% |
Mechanical Properties
| Grade | Tensile Strength | Yield Strength | Elongation |
|---|---|---|---|
| 15CrMo | ≥415 MPa | ≥220 MPa | ≥30% |
| 42CrMo | 980-1180 MPa | 785-930 MPa | 9-18% |
| Page 9 | ≥415 MPa | ≥205 MPa | - |
Applications
- Energy & Power: Power Plants, Nuclear Power, High-Pressure Boilers – Superheater Tubes, Reheater Tubes, Main Steam Pipes
- Petrochemical: High-temperature and high-pressure fluid transport equipment and pipelines for oil, petrochemicals, and aerospace.
- Military Machinery: Barrels, Drill Pipes, and High-Performance Mechanical Parts
- Typical applications: 15CrMo operating temperature range from 500°C to 550°C, suitable for heat transfer surfaces of high-pressure boilers.
Key Features
- Excellent high-temperature resistance (up to 550°C)
- Excellent low-temperature and corrosion resistance
- Contains alloying elements such as Cr and Mo; high strength.
- Built for extreme operating conditions
- Common grades: Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, 15CrMoG, 12Cr2MoG, 12Cr1MoVG, etc.
