21. Specification for 3% chromium-molybdenum steel castings (620-770 N/mm2 ). (9th March 1973) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (6 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
22. Specification for 3% chromium-molybdenum steel castings (880-1080 MPa). (10th May 1974) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (4 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
23. Specification for 4% nickel-chromium-molybdenum case-hardening steel (vacuum arc remelted) billets, bars, forgings and parts (1320-1520 MPa). (30th June 1976) 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) ↗
24. Specification for 4/1 nickel-chromium steel tube (1150 N/mm2 ). (27th October 1972) 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) ↗
25. Specification for 4/1 nickel-chromium steel tube (1300 N/mm2 ). (27th October 1972) 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) ↗
26. Specification for 90° countersunk head corrosion-resisting steel bolts (UNF threads) for aircraft. (9th March 1954) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
27. Specification for aircraft material. 1 per cent chromium steel (55/65 tonf/sq in: limiting ruling section 1⅛ inch). (31st January 1964) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (5 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
28. Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (35/45 tonf/sq in: limiting ruling section 6 in). (31st January 1964) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (7 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
29. Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (45/55 tonf/sq in: limiting ruling section 6 in). (31st January 1964) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (3 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
30. Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (free machining) (45/55 tonf/sq in: limiting ruling section 6 in). (31st January 1964) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (3 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗