JIS G3115 SPV450

SPV450 is a kind of silicon manganese steel and is used for pressure vessels. It is a steel grade that is easy to use because it has parameters that are indispensable for use as a pressure vessel, but of course it can also be used for other purposes. Slightly different from other steel materials, 450 in the numerical part of the material symbol SPV450 is not the tensile strength but the minimum value of the yield point (proof stress) in MPa.

Although a large amount of carbon adversely affects weldability, it affects the strength, so it is supplemented with alloying elements.

This steel material has major features such as strength and stickiness.

Technical Requirements & Additional Services:

  • High tension test
  • Chemical Analysis
  • Low temperature impacting test
  • Ultrasonic test under EN 10160,ASTM A435,A577,A578
  • Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
  • Shot blasting and Painting,Cutting and welding as per end user’s demands

Mechnical property for SPV450 boiler steel:

Thickness (mm)
SPV450 ≥6 ≤ 50 > 50 ≤ 100 > 100
Yield strength (≥Mpa) 450 430 410
Tensile strength (Mpa) 570-700

Chemical composition for SPV450 boiler steel (Ladle Analysis Max%)

Main chemical elements composition of SPV450
C Si Mn P S
0.18 0.75 1.60 0.030 0.030
Boiler steel plate SPV450 is mainly used in pressure vessels for intermediate temperature services.The minimum yield strength of SPV450 shall be above 450Mpa,and tensile strength of SB480M shall be within 570-700Mpa.For boiler steel plate SPV450 shall be normalized when rolling.Besides,Ultrasonic test is necessary,and high tension,simulated post welded heat treatment shall be chosed by the end users,such as boiler manufacturers,heat exchanger plants.Other alloy elements to be added shall be agree upon between the purchaser and manufacturer before ording boiler steel plate SPV450.
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