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A573

This specification covers structural quality carbon-manganese-silicon steel plates in three tensile strength ranges intended primarily for service at atmospheric temperatures where improved notch toughness is important. If the steel is to be welded, a welding procedure suitable for the grade of steel and intended use or service shall be utilized. The steel shall be made by fine grain practice. Heat and product analysis shall conform to the chemical composition requirements prescribed for carbon, manganese, phosphorus, sulfur, and silicon. The tension test specimen shall conform to the tensile requirements including tensile strength, yield point, and elongation.

A573 Steel Plate Processing

Properties of ASTM A573, Grade 70

Properties Metric English Comments
Density 7.85 g/cc 0.284 lb/in2 Typical of ASTM Steel
Tensile Strength, Ultimate 485-620 MPa 70300-89900 psi  
Tensile Strength, Yield 290 MPa 42100 psi  
Elongation at Break 18% 18% in 200 mm
Bulk Modulus 140 GPa 20300 ksi Typical for steel
Shear Modulus 80.0 GPa 11600 ksi Typical for steel
Carbon, C 0.28% 0.28% may vary with plate thickness
Iron, Fe 98% 98% as balance
Manganese, Mn 0.85-1.2% 0.85-1.2%  
Phosphorous, P 0.04% 0.04%  
Silicon, Si 0.15-0.40% 0.15-0.40%  
Sulfur, S 0.05% 0.05%  

This specification covers structural quality carbon-manganese-silicon steel plates in three tensile strength ranges intended primarily for service at atmospheric temperatures where improved notch toughness is important.

If the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. See Appendix X3 of Specification A6/A6M for information on weldability.