20G seamless boiler tube is a key material specially used for manufacturing high-pressure and ultra-high-pressure boilers. It has excellent pressure resistance and heat resistance and is suitable for boiler equipment under various high-temperature and high-pressure environments.
GNEE's 20G high-pressure boiler tube is made of high-quality carbon structural steel with good mechanical properties and high-temperature resistance. Common specifications include outer diameter 48-219mm and wall thickness 3-40mm. The wall thickness is generally required to be above 4mm to ensure the safe operation of high-pressure boilers.
Chemical composition of GB 5310 20G steel pipe
| Grade | Chemical Composition(%) | ||||||||||
| C | Si | Mn | Cr | Mo | V | Ni | Altot | Cu | P | ||
| Max | |||||||||||
| 20G | 0.17～0.23 | 0.17～0.37 | 0.35～0.65 | ≤0.25 | ≤0.15 | ≤0.08 | ≤0.25 | ≤0.015 | ≤0.20 | 0.025 | |
Mechanical properties of GB 5310 20G pipe
| Steel Pipe | Tensile properties | Impact energy(Akv),J | Hardness | |||||||
| Tensile strength (MPa) |
Yield Strength (MPa) |
Elongation % |
Portrait | Landscape | A | B | C | |||
| HBW | HV | HRC | ||||||||
| Portrait | Landscape | |||||||||
| Max | Min | |||||||||
| 20G | 410～550 | 245 | 24 | 22 | 40 | 27 | - | - | - | |
Heat treatment for GB 5310 20G High Pressure Boiler Tubes
| Grade | Heat treatment |
| 20G | 880 ℃～940 ℃,Normalizing |
GB 5310 20G High Pressure Seamless Boiler Tubes
GNEE has five finishing rolling lines and two hot rolling lines. In addition, we also adopt more advanced automatic width control system (AWC), automatic thickness control system (AGC), bending roll system, work roll groove roll system and other effective measures to ensure product quality.
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FAQ
Q:Are you trading company or manufacture?
A:Both.
Q:Can I have a trial order only for several tons?
A:We can ship the regular specifications with LCL service.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free, with the cost of freight paid by customer.
Q:How long is your delivery time?
A:Generally it is 3-5 days if goods are in stock. or around 30days if the goods are not in stock and it is according to order requirement.
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