1. Specification for aircraft material. 2½ per cent nickel-chromium-molybdenum steel (high carbon) (75/85 tonf/sq in: limited ruling section 6 in). (31st January 1964) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗