Japanese standard steel plate grades from China SB480M Chemical composition of pressure vessel plates&Mechanical properties
SB480M Approaching Steel Plate Grade Lookup Table

Grade Chemical composition Mechanical properties Remark
C Mn Si S P Ni Al Cr Cu Mo … ReH Rm KV₂ Elongation:
2 inches [50 mm]%
SB480M 0.27 0.98 0.45 0.03 0.03 0.45-0.60 275 480-620 17