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Grade SB450
Corresponding Standard JIS G 3103-2019
Carbon Steel and Molybdenum Alloy Steel Plates for Boilers and Pressure Vessels
Classification Alloy Steel
SB450 Chemical Element Composition Content (%)
  Component C Si Mn P S Cr Ni Cu Mo Ti * V * Nb * B
厚度t≤25 Minimum Value - 0.15 - - - - - - - - - - -
Maximum Value 0.28 0.4 0.9 0.02 0.02 0.3 0.4 0.4 0.12 0.03 0.03 0.02 0.001
  Component C Si Mn P S Cr Ni Cu Mo Ti * V * Nb * B
厚度25<t≤50 Minimum Value - 0.15 - - - - - - - - - - -
Maximum Value 0.31 0.4 0.9 0.02 0.02 0.3 0.4 0.4 0.12 0.03 0.03 0.02 0.001
  Component C Si Mn P S Cr Ni Cu Mo Ti * V * Nb * B
厚度50<t≤200 Minimum Value - 0.15 - - - - - - - - - - -
Maximum Value 0.33 0.4 0.9 0.02 0.02 0.3 0.4 0.4 0.12 0.03 0.03 0.02 0.001
Approximate Comparison Table Pressure-Bearing Flat Steel
Japan United States International Organization for Standardization
JIS ASTM ISO
SB450
SGV450 		A515-65
A516-65 		PT450GH

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