... for its highest strength and hardness compared to commercial copper alloys. C17200 alloy contains appr. 2% of beryllium ... relaxation at elevated temperatures.Typical Application for C17200 Beryllium Copper Alloys:Electrical Industry: Electrical Switch and Relay Blades, ... Parts, Valves, Bourdon Tubes, Wear Plates on Heavy Equipment, Bellows International Specification:Rods/Bars/Tubes: ASTM B196, 251, 463 ...