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, Rings, and Stock for Forging or Flash Welded Rings Aircraft Quality 0.95Cr - 0.20Mo (0.38 - 0.43C) (4140) Annealed