Home Products High Performance Alloys Copper Beryllium Alloys Alloy 3, 10, 10X, 310 HIGH CONDUCTIVITY COPPER BERYLLIUM ALLOYS ALLOY 3 / ALLOY 10 / ALLOY 10X / ALLOY 310 Materion manufactures a family of copper beryllium (CuBe) alloys that includes Alloy 3, Alloy 10, Alloy 10x and Alloy 310. These CuBe Alloys offer high electrical and thermal conductivity with yield strength variation based on alloy chemistries. ALLOY 3 Alloy 3 (UNS C17510), a copper-nickel-beryllium alloy, provides good strength with high electrical and thermal conductivity and good resistance to stress relaxation. This alloy features good elevated temperature strength. To learn more about Alloy 3 physical and mechanical properties, forms, sizes and tolerances, download our Alloys 3 data sheets. ALLOY 10 Alloy 10 (UNS C17500), a copper-cobalt-beryllium alloy, combines moderate yield strength, up to 140 ksi, with electrical and thermal conductivity that is 45 to 60 percent that of pure copper. To learn more about Alloy 10 physical and mechanical properties, forms, sizes and tolerances, download our Alloys 10 data sheet. ALLOY 10X Alloy 10X, a copper-cobalt-beryllium-zirconium alloy, was developed for improved high-temperature strength and ductility. Alloy 10X retains good strength and ductility at temperatures up to 800 °F/ 430 °C, and it has superior resistance to thermal cracking. It is the copper alloy of choice for sustained operation when high strength is required above 575 °F/ 300 °C. To learn more about Alloy 10X physical and mechanical properties, forms, and sizes, download our Alloys 10X data sheet. ALLOY 310 Alloy 310, a copper-beryllium-nickel-cobalt alloy, combines the properties of Alloy 3 and Alloy 10, offering high electrical and thermal conductivity along with good strength and hardness. Alloy 310 has higher than average thermal fatigue resistance. To learn more about Alloy 310 physical and mechanical properties, forms, sizes and tolerances, see our Alloy 310 data sheet. COPPER BERYLLIUM ALLOY 3, 10, 10X & 310 APPLICATIONS Alloy 3 and Alloy 10 are engineered for excellent performance in the appliance, automotive, telecom and energy industries. Alloy 3 wire works well for long-reach power and signal cables for offshore oil and gas operations. Our Alloy 3 strip product provides very high electrical conductivity, making it a reliable material for switches and relays. Alloy 3 and Alloy 10 plate offer high thermal conductivity and are excellent materials for metal die casting, injection molding and blow molding. Alloy 10x offers outstanding thermal conductivity and superior resistance to thermal cracking, making this material ideal for high performance powertrain automotive applications such as exhaust valve seats. Alloy 310 combines the electrical conductivity with thermal durability, making it a good material for resistance welding electrodes, welding electrode components, non-ferrous metal casting, dies, nozzles and plungers. ALLOY 3, 10, 10X AND 310 SPECIFICATIONS & STANDARDS Our alloy products adhere to specifications and standards set by ASTM International, SAE International, RWMA, European Standard EN and the Military Standard. The chart below shows the specifications for each product. To find information and specifications on each product, read our product literature about our copper beryllium wrought alloys. CUBE ALLOY 3 Alloy 3 Strip Alloy 3 Rod & Bar Alloy 3 Plate Alloy 3 Tube Alloy 3 Wire Alloy 3 Forgings & Extrusions ASTM B 534 ASTM B 888 ASTM B 441 ASTM B 534 ASTM B 937 ASTM B 938 SAE J461 SAE J463 SAE J461 SAE J463 RWMA Class 3 RWMA Class 3 RWMA Class 3 EN 1652 EN 1654 EN 14436 EN 12163 EN 12165 EN 12167 EN 12163 EN 12165 EN 12167 EN 12167 EN 12166 EN 12165 EN 12420 MIL-C-81021 CUBE ALLOY 10 Alloy 10 Rod & Bar Alloy 10 Plate Alloy 10 Tube Alloy 10 Wire Alloy 10 Forgings & Extrusions ASTM B 441 ASTM B 534 ASTM B 937 ASTM B 938 SAE J461 SAE J463 SAE J461 SAE J463 SAE J461 SAE J463 SAE J461 SAE J463 RWMA Class 3 RWMA Class 3 EN 12163 EN 12165 EN 12167 EN 12163 EN 12165 EN 12167 EN 12165 EN 12166 EN 12165 EN 12420 CUBE ALLOY 10X Alloy 10X Rod & Bar Alloy 10X Plate Alloy 10X Tube Alloy 10X Wire Alloy 10X Forgings & Extrusions ASTM B 441, RWMA Class 3 - ASTM B 441, RWMA Class 3 - - CUBE ALLOY 310 Alloy 310 Rod & Bar Alloy 310 Plate Alloy 310 Tube Alloy 310 Wire Alloy 310 Forgings & Extrusions RWMA Class 3 EN 1652, RWMA Class 3 - - RWMA Class 3 If you have questions about the best CuBe Alloy to meet your demanding specification, contact our engineering team for further details and product selection support.