标准摘要
This specification covers an aircraft-quality, low-alloy steel in the form of heat-treated bars 1.50 inches (38.1 mm) and less in diameter or least distance between parallel sides.
英文名称Steel Bars 0.95Cr - 0.20Mo (0.28 to 0.33C) (SAE 4130) Aircraft Quality Hardened and Tempered, 125 ksi (862 MPa) Tensile Strength