High-strength Carbon Steel Tubes For High-pressure Boiler Applications
Gb 5310 20mng seamless boiler tubes, compliant with gb/t 5310-2017, are high-strength carbon steel tubes designed for high-pressure boilers, offering excellent mechanical properties and corrosion resistance for superheaters, reheaters, and steam pipelines.
High-strength Carbon Steel Tubes For High-pressure Boiler Applications
Gb 5310 20mng seamless boiler tubes, compliant with gb/t 5310-2017, are high-strength carbon steel tubes designed for high-pressure boilers, offering excellent mechanical properties and corrosion resistance for superheaters, reheaters, and steam pipelines.
GB 5310 20MnG seamless boiler tubes, compliant with GB/T 5310-2017, are high-strength carbon structural steel tubes designed for high-pressure boilers operating at pressures ≥9.8 MPa and temperatures between 450°C and 650°C. These tubes are manufactured using seamless processes, either hot-rolled (extrusion, expansion) or cold-drawn (rolling), ensuring superior dimensional accuracy and structural integrity. They are ideal for superheaters, reheaters, economizers, and steam pipelines in power plant boilers, with a maximum wall temperature of ≤450°C for headers and steam pipes.
Available in outer diameters from 23 mm to 1500 mm and wall thicknesses from 2.8 mm to 150 mm, GB 5310 20MnG seamless tubes offer excellent tensile strength (415–580 MPa) and enhanced corrosion resistance due to higher manganese content (0.7–1.0%). The manufacturing process involves smelting via electric furnace, oxygen converter, or electroslag remelting, with tube blanks produced by continuous casting, die casting, or hot rolling (forging). Normalizing heat treatment at 900–940°C enhances mechanical properties, while rigorous testing (hydraulic, flattening, flaring, ultrasonic, low-power, non-metallic inclusions, grain size, microstructure, and decarburization layer) ensures compliance with GB/T 5310-2017 and GB/T 699 standards.
Compared to GB 5310 20G or alloy grades like 15CrMoG, 20MnG tubes provide higher strength and better toughness due to elevated manganese, making them suitable for demanding high-pressure applications. Weldability is good, typically using manual welding (e.g., E4303 or E4315 electrodes) or gas-shielded welding without preheating. Surface treatments like varnishing or galvanizing prevent rust, and tubes are delivered with plain, beveled, or threaded ends. These tubes are widely used in power generation, petrochemicals, and industrial boiler systems, ensuring reliable performance under high-pressure and high-temperature conditions.
GB 5310 20MnG seamless boiler tubes are a robust, cost-effective solution for high-pressure boiler systems, offering durability, safety, and efficiency in critical industrial environments.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.17–0.24 |
| Silicon (Si) | 0.17–0.37 |
| Manganese (Mn) | 0.70–1.00 |
| Phosphorus (P) | ≤0.030 |
| Sulfur (S) | ≤0.030 |
| Chromium (Cr) | ≤0.15 |
| Nickel (Ni) | ≤0.25 |
| Copper (Cu) | ≤0.20 |
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 415–580 |
| Yield Strength (MPa) | ≥240 |
| Elongation, min (%) | ≥22 |
| Impact Energy (J, 0°C) | ≥27 |
Tensile strength of 415–580 MPa for high-pressure reliability.
Resistant to steam and water corrosion.
Handles up to 450°C for headers/steam pipes.
Eliminates weak points for enhanced safety.
Weldable without preheating for easy installation.
Durable and efficient for high-pressure applications.
| Feature | GB 5310 20MnG | GB 5310 20G | GB 5310 15CrMoG |
|---|---|---|---|
| Material Type | Carbon Steel | Carbon Steel | Low-Alloy Steel |
| Temperature Range | ≤450°C (headers/steam pipes) | ≤425°C (headers/steam pipes) | ≤540°C (superheater) |
| Tensile Strength (MPa) | 415–580 | 410–550 | 440–640 |
| Yield Strength (MPa) | ≥240 | ≥230 | ≥295 |
| Weldability | Good | Good | Moderate |
| Applications | High-pressure boilers | High-pressure boilers | Ultra-supercritical boilers |
| Key Advantage | High strength and toughness | Good plasticity | High creep resistance |
A curated list of long-tail keywords for GB 5310 20MnG seamless boiler tubes, covering specifications, applications, and material properties.
Note: GB 5310 20MnG seamless boiler tubes comply with GB/T 5310-2017 and GB/T 699 standards. For detailed specifications, refer to the standards or contact a certified supplier.
GB 5310 20MnG seamless boiler tubes are critical for high-pressure boiler systems, superheaters, reheaters, and petrochemical applications, offering high strength and reliability.
Used in boilers with pressures ≥9.8 MPa.
Handles temperatures up to 450°C.
Efficient heat transfer in boiler systems.
Reliable for high-pressure steam flow.
Improves boiler efficiency.
Used in high-pressure fluid systems.
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