JIS G3115 SPV235

SPV235 is one of the JIS standard material symbols specified for steel plates for pressure vessels, and the number 235 indicates the lowest yield point at room temperature.

Under JIS G3115 steel standard,boiler steel plate SPV235 is mainly used for welded boilers and other pressure vessels&tanks.For thickness equal and below 50 millimeters,the yield point of boiler steel plate SPV235 shall be above 235Mpa,and for thickness above 50 millimeters,the minimum yield strength for pressure vessel steel plates shall be 215Mpa.The tensile strength of steel plate spv235 shall be within 400-510Mpa.Alloy elements may be added if necessary when rolling boiler steel plate SPV235.

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 SPV235 boiler steel:

Thickness (mm)
SPV235 ≥6 ≤ 50 > 50 ≤ 100 > 100
Yield strength (≥Mpa) 235 215 195
Tensile strength (Mpa) 400-510

Chemical composition for SPV235 boiler steel (Ladle Analysis Max%)

Main chemical elements composition of SPV235
Thickness(mm) C Si Mn P S
T≤100 0.18 0.35 1.40 0.030 0.030
T>100 0.20

Basically, it becomes SPV steel as it is rolled. According to regulations, normalization can be performed in some cases. Of the six types of SPV materials, only this SPV235 has a thickness of 100 mm as a boundary, and the carbon content standard is divided into 0.18 or less and 0.20 or less. In addition, among 6 types, it is the grade with the least amount of manganese. The thickness range is 6mm to 200mm.

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