Chinese-made American standard steel plate grades ASTM A203B Chemical composition of pressure vessel plates&Mechanical properties
ASTM A203B Approaching Steel Plate Grade Lookup Table

Grade Chemical composition Mechanical properties Remark
C Mn Si S P Cr Ni … ReH Rm KV₂ 8inch[200mm]，% 2inch[50mm]，%
ASTM A203 B 0.25 0.88 0.13-0.45 0.025 0.025 - 2.03-2.57 40 [275] 70-90 [485-620] 17 21