1. Aerospace series. Steel X2CrNi18-9 (1.4307). Softened. 450 MPa < Rm < 680 MPa. Bars for machining. 4 mm < De < 100 mm. (12th September 2019) 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) ↗