20G seamless steel pipe is a high-quality carbon structural steel, boiler material, the carbon content of 0.17-0.24%, tensile strength of 410Mpa, yield point 230-250Mpa.
- Internal defect control of small-diameter high-pressure boiler pipe
- Hardness testing methods of high-pressure 20G seamless steel pipe for boiler
- Boiler pipe forming: ① fin tube ② serpentine tube ③ reaming welding
- Characteristics of boiler pipe
- Heat boiler seamless extrusion technology
- Low and medium pressure boiler pipe
Is our main production of steel, we can provide 20G Seamless pipe with high quality and competitive price. Here to introduce you to our 20G seamless pipe basic chemical properties and mechanical properties.
20G is the steel material of GB 5310- 2008. GB 5310- 2008 standard is applicable to seamless tubes for making steam boiler whose pressure is high or higher and seamless tubes used as pipelines.
Chemical Compositions(%) of 20G：
| Chemical elements | Data |
|---|---|
| Carbon | 0.17-0.24 |
| Silicon | 0.17-0.37 |
| Manganese | 0.70-1.00 |
| Phosphorus(max) | 0.03 |
| Sulfur(max) | 0.03 |
| Chromium(max) | 0.25 |
| Molybdenum(max) | 0.15 |
| Cuprum(max) | 0.2 |
| Nickel(max) | 0.25 |
| Vanadium(max) | 0.08 |
Mechanical Properties of 20G：
| Properties | Data |
|---|---|
| Yield Strength (Mpa) | ≥415 |
| Tensile Strength (Mpa) | 240 |
| Elongation (%) | 22 |
The W.T. tolerance of 20G：
| W.T.(S) | Tolerance of W.T. | |
|---|---|---|
| <3 .5="" td=""> | +15%(+0.48mm min) | |
| -10%(+0.32mm min) | ||
| 3.5-20 | +15%,-10% | |
| >20 | D<219 td=""> | ±10% |
| D≥219 | +12.5%,-10% | |
GB5310 20G boiler steel pipe Other Name
GB5310 20G boiler steel pipe, 20G boiler steel pipe, 20G boiler pipe
Delivery Condition:
Annealed, Normalized, Normalized and Tempered
Inspection and Test:
Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.
Surface treatment:
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
Boiler tubing is used in these industries:- Steam Boilers
- Power Generation
- Fossil Fuel Plants
- Electric Power Plants
- Industrial Processing Plants
- Cogeneration Facilities
