标准摘要
This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, flash-welded rings, and stock for forging or flash-welded rings.
英文名称Steel Bars, Forgings, and Rings and Stock for Forging or Flash Welded Rings Aircraft-Quality 0.50Cr - 0.55Ni - 0.25Mo (0.38 - 0.43C) (8740)