Chinese-made American standard steel plate grades ASTM SA542 Type C 4a Chemical composition of pressure vessel plates&Mechanical properties
ASTM SA542 Type C 4a Approaching Steel Plate Grade Lookup Table

ASTM SA542 Type C 4a  Chemical composition

Grade Chemical composition Remark
C Mn Si S P Cr Mo Ni V B Ti Cu Nb Zr …
SA542
Type C 4a		 Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis ≤ Smelting
Analysis		 Finished Product Analysis ≤ Smelting
Analysis		 Finished Product Analysis ≤ Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis
0.10-0.15 0.08-0.18 0.30-.60 0.25-0.66 0.13 0.13 0.13 0.025 0.025 0.025 0.025 0.025 0.025 2.75-3.25 2.63-3.37 0.90-
1.10		 0.85-
1.15		 0.20-0.30 0.18-0.33 0.001-0.003 NA (Finished product analysis is not applicable) 0.015-0.035 0.005-0.045 ≤0.25 ≤0.28

ASTM SA542 Type C 4a  Mechanical properties

Grade Mechanical properties Remark
ReH Rm KV₂ Elongation%
SA542
Type C 4a		 ≥415 585-760 2-inch (50 mm) gauge length elongation
≥18