Chemical Composition

 

The chemical composition of JIS G3456 STPT480 seamless steel pipe is as follows:

 

Carbon (C): 0.33 - 0.38%

Manganese (Mn): 0.5 - 0.8%

Phosphorus (P): ≤ 0.035%

Sulfur (S): ≤ 0.035%

Silicon (Si): 0.15 - 0.35%

 

Mechanical Properties

 

The mechanical properties of JIS G3456 STPT480 seamless steel pipe are:

 

Tensile Strength (MPa): ≥ 570

Yield Strength (MPa): ≥ 335

Elongation (%): ≥ 30

Hardness (HB): ≤ 187

 

Heat Treatment

 

The JIS G3456 STPT480 seamless steel pipe can be heat treated by either normalization or quenching and tempering.

 

The normalization process involves heating the steel pipe to a temperature of 900-950℃, holding it for a predetermined time, and then cooling it in still air.

 

The quenching and tempering process involves heating the steel pipe to a temperature of 850-890℃, quenching it in water or oil, and then tempering it at a temperature of 540-700℃.

 

Dimension Range

 

The outer diameter of JIS G3456 STPT480 seamless steel pipe ranges from 14mm to 1422mm, and its wall thickness ranges from 2mm to 30mm.

 

Applications

 

JIS G3456 STPT480 seamless steel pipe is mainly used for high-pressure fuel pipes in boilers, heat exchangers, and superheaters in the petroleum, chemical, electric power, and boiler industries.

 

TJC Steel Supply Cases

 

TJC Steel has supplied JIS G3456 STPT480 seamless steel pipe to several customers in various industries, including the petroleum, chemical, and electric power industries.

 

In one case, TJC Steel supplied JIS G3456 STPT480 seamless steel pipe to a petrochemical company in Asia for use in a high-pressure fuel pipe in a boiler. The customer was satisfied with the quality of the product and the timely delivery by TJC Steel.

 

In another case, TJC Steel supplied JIS G3456 STPT480 seamless steel pipe to an electric power company in Europe for use in a heat exchanger. The customer praised TJC Steel for its excellent service and timely delivery.

 

Conclusion

 

JIS G3456 STPT480 seamless steel pipe is a durable and reliable high-pressure fuel pipe used in boilers, heat exchangers, and superheaters. It has excellent mechanical properties, can be heat treated by either normalization or quenching and tempering, and has a wide dimension range. TJC Steel has a proven track record in supplying JIS G3456 STPT480 seamless steel pipe to various customers in different industries.