1. ASTM A 370-90a Standard Test Methods and definitions for mechanical testing of steel products . (1990a). ASTM Philadelphia Pa.
2. ASTM A 607-90a standard specification for steel sheet and strip high-strength low-alloy columbium or vanadium or both—Hot-rolled and cold-rolled . (1990b). ASTM Philadelphia Pa.
3. ASTM A 715-90 standard specification for steel sheet and strip high-strength low-alloy hot-rolled and steel sheet cold-rolled high-strength low-alloy with improved formability . (1990c). ASTM Philadelphia Pa.
4. ASTM E 8M-90a standard methods for tension testing of metallic materials . (1990d). ASTM Philadelphia Pa.
5. ASTM E 23-91 notched bar impact testing of metallic materials . (1991). ASTM Philadelphia Pa.