Chinese-made American standard steel plate grades ASTM SA517 classH Chemical composition of pressure vessel plates&Mechanical properties
ASTM SA517 classH Approaching Steel Plate Grade Lookup Table

ASTM SA517 classH  Chemical composition

Grade Chemical composition Remark
C Mn Si S P Cr Mo Ni V B Ti Cu Nb Zr …
SA517 classH Smelting
Analysis		 Finished Product Analysis 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 ≥0.0005 Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis Smelting
Analysis		 Finished Product Analysis
0.12-0.21 0.10-0.23 0.95-1.30 0.87-1.41 0.15-0.35 0.13-0.37 0.40-0.65 0.36-0.69 0.20-
0.30		 0.17-
0.33		 0.30-0.70 0.27-0.73 0.03-0.08 0.02-0.09

ASTM SA517 classH  Mechanical properties

Grade Mechanical properties Remark
ReH Rm KV₂ Elongation（%） Area reduction
(Circular sample)		 Area reduction
(Rectangular specimen)
SA517 classH Steel plate thickness
≤2.5inch
（65mm）		 Steel plate thickness＞
2.5inch~6inch
（65~150mm）		 Steel plate thickness
≤2.5inch
（65mm）		 Steel plate thickness＞
2.5inch~6inch（65~150mm）		 Steel plate thickness
≤2.5inch
（65mm）		 Steel plate thickness＞
2.5inch~6inch（65~150mm）		 Steel plate thickness
≤2.5inch
（65mm）		 Steel plate thickness＞
2.5inch~6inch（65~150mm）		 Steel plate thickness
≤2.5inch
（65mm）		 Steel plate thickness＞
2.5inch~6inch（65~150mm）
690 620 795-930 725-930 ≥16 ≥14 ≥35 ≥45 ≥45