| Property | Requirement | |----------|--------------| | Tensile Strength | 60 ksi (415 MPa) min | | Yield Strength (min) | 36 ksi (248 MPa) typical (not mandatory by A307 but common for Grade A) | | Elongation (in 2 in.) | 18% min | | Reduction of Area | 35% min |

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| Element | % | |---------|----| | Carbon | 0.29% (for sizes < 1" dia); 0.31% (for 1" to 1½" dia) | | Manganese | 0.60–0.90% (depends on heat analysis) | | Phosphorus | 0.04% | | Sulfur | 0.05% |