Table 3.

Chemical composition of caps (weight %).

Elem Ent	Un-leak cap	Leak Cap	SA 204 gr. B Specs.	SA 213 gr. T12 Specs.
Carbon	0.19	0.19	≤0.20	0.05–0.15
Manganese	0.67	0.90	≤0.90	0.30–0.61
Phosphorus	0.022	0.017	≤0.025	≤0.025
Sulfur	0.005	0.006	≤0.025	≤0.025
Silicon	0.56	0.26	0.13–0.45	≤0.50
Molybdenum	0.45	0.54	0.41–0.64	0.44–0.65
Chromium	1.04	0.01	---	0.80–1.25