20MnG High Pressure Boiler Tube Alloy Seamless Pipe For Boilers Heat Exchangers
20MnG High Pressure Boiler Tube Alloy Seamless Pipe For Boilers And Heat Exchangers
Material
20MnG is a high-quality alloy steel material commonly used for manufacturing high-pressure boiler tubes and seamless pipes. It is designed to withstand high temperature and pressure conditions typically found in boilers and heat exchangers.
Specification
- Type: Alloy Steel Seamless Pipe
- Standard: Typically manufactured as per ASTM, EN, GOST, JIS, GB standards
- Diameter: Varies depending on application (commonly ranges from 20 mm to 273 mm OD)
- Wall Thickness: Varies according to pressure requirement
- Length: Usually supplied in random or fixed lengths
Chemical Composition
| Element | C (%) | Mn (%) | Si (%) | P (%) Max | S (%) Max | Other Elements (max) |
|---|---|---|---|---|---|---|
| 20MnG | 0.17–0.24 | 1.10–1.40 | 0.17–0.37 | 0.035 | 0.035 | Cu, Ni, Cr as controlled impurities |
Mechanical Properties
| Property | Value | Test Standard |
|---|---|---|
| Tensile Strength (Rm) | 410–540 MPa | ASTM / EN / GB |
| Yield Strength (Rp0.2) | Minimum 245 MPa | ASTM / EN / GB |
| Elongation (A5) | Minimum 20% | ASTM / EN / GB |
| Hardness | Typically less than 200 HB | ASTM / EN / GB |
Key Features
- High Strength: Suitable for high pressure and temperature environments.
- Excellent Weldability: The alloy design ensures good weldability for easy fabrication.
- Corrosion Resistance: Adequate resistance to oxidation and corrosion in boiler environments.
- Seamless Pipe: Manufactured without weld seam, enhancing durability and reliability.
- Thermal Stability: Maintains mechanical properties under cyclic temperature conditions.
- Good Toughness: Ensures resistance to crack propagation and mechanical shocks.
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | A335 P11 / P22 (similar application range) |
| EN | 20MnG (1.0421 - similar specs) |
| GOST | 20MnG / 20MnGB |
| JIS | SCM420 / SCM430 (approximate equivalent) |
| GB | 20MnG |
Application
- High-Pressure Boilers: Used in manufacturing of boiler tubes that operate under high steam pressures.
- Heat Exchangers: Suitable for seamless piping in heat exchangers requiring resistance to high temperatures and pressure.
- Superheater Tubes: Ideal for superheater and reheater tubes used in power plants.
- Petrochemical Industry: Used for pipelines subjected to thermal and mechanical stress.
- Other Industrial Boilers: Used in industrial boilers for power generation, chemical plants, and refineries.
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A: Yes, we could offer the sample for free charge but need pay the cost of freight.
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