JIS G3115 SPV355

SPV355 is one of the material symbols stipulated in JIS standards as a steel material for pressure vessels. Also called SPV material. Since it is only for pressure vessels and contains various regulations for determining breaking strength, it may be used for other than pressure vessels. According to the regulations, it is a grade that can also control thermal processing. In this case, improvement of weldability, improvement of low temperature brittleness, etc. can be specified.

The thickness range of the applied steel sheet / steel material is 6 mm or more and 150 mm or less. From the composition, it can also be called low carbon silicon manganese steel.

Because there are a lot of indicators for seeing weldability and strength, it can be used other than pressure vessels depending on cost.

The number 355 in the SPV symbol indicates the lower limit of the yield point (proof strength) that must be satisfied in MPa. Tensile strength ranges from 520 to 640 MPa at room temperature, and is a well thought-out material for fracture strength.

SPV355 specific gravity
The specific gravity is based on 7.85, which is the same as that for hot-rolled steel sheets, but it varies strictly depending on the components.

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 SPV355 boiler steel:

Thickness (mm)
SPV355 ≥6 ≤ 50 > 50 ≤ 100 > 100
Yield strength (≥Mpa) 355 335 315
Tensile strength (Mpa) 520-640

Chemical composition for SPV315 boiler steel (Ladle Analysis Max%)

Main chemical elements composition of SPV315
C Si Mn P S
0.20 0.55 1.60 0.030 0.030


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