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GB5310 20G Seamless Boiler Tube 6inch XXS 12M Length
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GB5310 Standard 20G Boiler Tubes
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.
Application:
GB5310 20G Seamless Steel Pipes Are Mainly Used For Pressure Vessels, Machinery, Pipe Fittings, Oil And Chemical Industry. Power Generation,Electric Power Plants, Cogeneration Facilities
Steel Grade: 20G, 20MnG, 25MnG etc
Chemical Composition:
| Steel Grade | C(%) | Si(%) | Mn(%) | P(%) | S(%) |
| 20G | 0.07~0.23 | 0.17~0.37 | 0.35~0.65 | ≤0.025 | ≤0.015 |
| 20MnG | 0.17~0.23 | 0.17~0.37 | 0.70~1.00 | ≤0.025 | ≤0.015 |
| 25MnG | 0.22~0.27 | 0.17~0.37 | 0.70~1.00 | ≤0.025 | ≤0.015 |
Mechanical Properties:
| Steel Grade | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation(%) | |
| Endwise | Crosswise | |||
| 20G | 410~550 | ≥245 | ≥24 | ≥22 |
| 20MnG | 415~560 | ≥240 | ≥22 | ≥20 |
| 25MnG | 485~640 | ≥275 | ≥20 | ≥18 |
Delivery Condition:
| +C(BK) | Cold drawn/hard.After the last cold forming,no heat treatment. |
| +LC(BKW) | Cold drawn/soft.After the last heat treatment follows the cold drawing there is a light finishing pass. |
| +SR(BKS) | Cold drawn and stress relieved annealed. After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere. |
| +A(GBK) | After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere. |
| +N(NBK) | Normalized. After the last cold drawing process the tubes are annealed in a controlled atmosphere. |
Size:1/4"-28"*Sch10-Sch160.XXS
Pipe Length: 6-19m
Certificate: ISO, CE, UL.
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