标准摘要
This specification covers a premium aircraft-quality alloy steel in the form of bars, forgings 100 square inches (645 cm 2x) and under in cross-sectional area, and forging stock of any size.
英文名称Steel, Bars and Forgings, and Forging Stock 3.1Cr - 11.5Ni - 13.5Co - 1.2Mo (0.21 - 0.25C) Vacuum Melted, Normalized and Overaged Precipitation Hardenable