Cube2--C17200 (CDA 172) Beryllium Copper is the most commonly utilized Copper Beryllium alloy and is notable for its highest strength and hardness compared to commercial copper alloys. C17200 alloy contains appr. 2% of beryllium and achieves its ultimate tensile strength can exceed 200 ksi, while the hardness approaches Rockwell C45. Meanwhile, the electrical conductivity is a minimum of 22% IACS in the fully aged condition.C17200 also exhibits exceptional resistance to stress relaxation at elevated temperatures. International Specification: Rods/Bars/Tubes: ASTM B196,251,463; SAE J461,463; AMS 4533,4534,4535; AMS4650,4651; RWMA Class 4 Strips:ASTM B194, AMS4530,4532; SAE J461,463 Sheets: ASTM B194 Wires:ASTM B197, AMS4725, SAE J461,463 Plates:ASTM B194, SAE J461,463; AMS4530,4533,4534,AMS4650,4651; RWMA Class 4. European Standards: CuBe2, DIN 2.1247, CW101C to EN Note: ASTM: American Society for Testing and Materials SAE: Society of Automotive Engineers AMS: Aerospace Materials Specification (Published by SAE) RWMA: Resistance Welder Manufacturers' Association Note: Unless otherwise specified, material will be produced to ASTM. Available Sizes: Custom Diameter & Sizes, Random Mill lengths Available Products (forms): Round bars, Round strips, Round wires, Round tube, Flat bars, Square bars, Rectangular bars, Hexagon bars, Plates, Sheets, Coils Custom shapes are available upon request. Chemical Composition: Be: 1.85-2.10% Co+Ni: 0.20% Min. Co+Ni+Fe: 0.60% Max. Cu: Balance Note: Copper plus additions equal 99.5% minimum Typical Physical Properties: Density (g/cm3): 8.36 Density before age hardening (g/cm3): 8.25 Elastic Modulus (kg/mm2 (103)): 13.40 Thermal Expansion Coefficient (20 ípC to 200 ípC m/m/ípC): 17 x 10-6 Thermal Conductivity (cal/(cm-s-ípC)): 0.25 Melting Range (ípC): 870-980 Note: 1). the units are based upon Metric. 2). the typical physical properties apply to age hardened products.