BS EN 0000. Aerospace series. Copper alloy Cu Be 1.9. Solution treated, cold worked to 1/2 hard & precipitation treated. Bar. 5 mm ≤ a or D ≥ 190 mm. Rm ≥ 1220 MPa Air transport engineering, Copper alloys, Copper, Bars (materials), Solution heat treatment, Cold-working, Precipitation hardening, Dimensions