Chinese-made American standard steel plate grades ASTM SA225 classC Chemical composition of pressure vessel plates&Mechanical properties
ASTM SA225 classC Approaching Steel Plate Grade Lookup Table

ASTM SA225 classC  Chemical composition

Grade Chemical composition Remark
C Mn Si S P Cr Mo Ni V …
SA225 classC ≤0.25 Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis ≤0.035 ≤0.035 Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis
≤1.60 ≤1.72 0.15-0.40 0.13-0.45 0.40-0.70 0.37-0.73 0.13-0.18 0.11-0.20

ASTM SA225 classC  Mechanical properties

Grade Mechanical properties Remark
ReH Rm KV₂ Elongation at 8-inch or 200-mm gauge length（%）
SA225 classC ≤3in （75mm） ＞3in （75mm） All thicknesses ≤3in （75mm） ＞3in （75mm） All thicknesses 8 inches or 200 millimeters measuring length 2-inch or 50-mm gauge length Gauge length
≥485 725-930 ≥20