TORICH INTERNATIONAL LIMITED
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Smls Pipe Steel Pipe GB5310-2017 20G High Pressure Boiler
Gb5310 high pressure boiler tubes are mainly used to manufacture high-quality carbon structural steel, alloy
structural steel and stainless heat-resistant steel seamless steel tubes for steam boiler tubes with high pressure
and above. These boiler tubes work under high temperature and high pressure, and the tubes will also undergo
oxidation and corrosion under the action of high-temperature flue gas and steam. Therefore, the steel tubes are
required to have high lasting strength High oxidation resistance and good tissue stability.
| Origin | ZHEJIANG CHINA |
| Brand | TORICH |
| Type | Seamless |
| Standard | GB 5310-1995, ASTM A106-2006 |
| Material | 10#.20#.45#15Mn.20Mn.45Mn.30Mn2,20Mn2,15CrMoG,etc. |
| Tolerance | ±3% |
| Application | Boiler Pipe |
| Technique | Hot Rolled |
| Certification | CE |
| OD | 10-530mm |
| WT | 1.5-70mm |
Chemical composition test
(1) Gb3087-2008 seamless steel tubes for low and medium pressure boilers. The chemical composition
test method shall be in accordance with the relevant parts of gb222-84 and gb223 methods for chemical
analysis of iron, steel and alloy.
(2) GB5310-2008 seamless steel tubes for high pressure boilers. The chemical composition test method
shall be in accordance with the relevant parts of gb222-84, methods for chemical analysis of steel and alloy
and gb223 methods for chemical analysis of steel and alloy.
Heat Treatment
| Grade | Heat Treatment System |
| 20G | N:880℃-940℃ |
| 20MnG | N:880℃-940℃ |
| 25MnG | N:880℃-940℃ |
| 15MoG | N:880℃-950℃ |
| 20MoG | N:880℃-950℃ |
| 12CrMoG | N+Tempering:N:900℃-960℃;Tempering:670℃-730℃ |
| 15CrMoG | N+Tempering:N:900℃-960℃;Tempering:680℃-730℃ |
| 12Cr2MoG | OD≤30mm N+Tempering:N:900℃-960℃;Tempering:700℃-750℃ OD＞30mm Quenching +Tempering: Quenching≥900℃;Tempering:700℃-750℃ N+Tempering:N:900℃-960℃;Tempering:700℃-750℃ |