Difference SPV450 and SPV490 steel plate

SPV450 and SPV490 are Japanese (JIS G3115) standard steel plates designed for boilers and pressure vessels, offering good weldability, with SPV490 having higher strength (around 490 MPa yield) than SPV450 (around 450 MPa yield), both used in critical applications like reactors, heat exchangers, and tanks in the chemical, petroleum, and power industries, differentiated by strength levels within the SPV series.

Key Characteristics

Standard: JIS G3115 (Boiler and Pressure Vessel Steel Plates).

Type: Hot-rolled steel plates with improved weldability for high-pressure service.

Application: Ideal for manufacturing reactors, heat exchangers, spherical tanks, and other components in heavy industries.

SPV450 vs. SPV490

SPV450: A grade within the JIS G3115 series, offering a specific yield strength (around 450 MPa minimum) suitable for high-temperature and pressure equipment.

SPV490: A higher-strength grade in the same series, with a minimum yield strength of 490 MPa (for thinner plates), making it suitable for even more demanding high-pressure applications.

Common Applications

Petroleum & Chemical Industry

Power Stations (Boilers, Steam Drums)

Reactors & Heat Exchangers

Spherical Tanks & Liquefied Gas Vessels

In essence, they are robust, weldable steels tailored for safety and performance in high-pressure environments, with SPV490 providing a higher mechanical strength than SPV450.

Chemical Composition

Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%

Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%

Mechanical Property