Home Products High Performance Alloys Copper Beryllium Alloys Alloy 25, M25, 165 HIGH STRENGTH COPPER BERYLLIUM ALLOYS ALLOY 25 / ALLOY M25 / ALLOY 165 Alloy 25 (UNS C17200), Alloy M25 and Alloy 65 do not trade high strength for conductivity, making these the high performance alloys of choice for connectors and components in heavy-duty applications in harsh environments. Alloy 25 provides the highest strength of any copper beryllium alloy, with electrical and thermal conductivity considerably greater than other high-strength copper alloys. Alloy M25, only available in rod and wire forms, offers similar strength to that of Alloy 25, but provides greater machinability with the addition of lead. Alloy 165 provides strength nearly as high as Alloy 25, but with a slightly lower beryllium content. BENEFITS OF USING COPPER BERYLLIUM ALLOYS Our advanced copper beryllium alloys offers several advantages over other types of materials, including: High fatigue strength High resistance to wear, corrosion, galling, and stress relaxation An ultimate tensile strength that can exceed 200 ksi and hardness approaching HRC 45 (Alloy 25) A minimum electrical conductivity of 22% IACS (International Annealed Copper Standard) (Alloy 25) Excellent machinability due to the inclusion of lead (Alloy M25) COPPER BERYLLIUM IS CONNECTING PEOPLE ADVANCED COPPER BERYLLIUM ALLOY APPLICATIONS ALLOY 25 In the oil and gas industry, Alloy 25 is used to make oil drilling components such as MWD/LWD tools, drill collars and subs, flex subs and shafts, drill rods, drill bit bushings, valve components, pump shafts and fasteners. Alloy 25 strip is used to make essential parts in consumer electronics like pressure sensor bellows, burn-in and test socket contacts, computer processor socket contacts and electromagnetic shielding gaskets. Read more about high strength Alloy 25, including physical and mechanical properties, forms, sizes and tolerances from our Alloy 25 data sheets. ALLOY M25 Alloy M25, with the addition of lead, provides better machinability than Alloy 25, allowing this alloy to be fabricated into contacts for electronics, aircraft and automotive applications. It can also be machined into parts for the watch industry, contacts for circular connectors and coaxial connectors. Learn about the highly machinable Alloy M25. Get all of the physical and mechanical properties, forms, sizes and tolerances from our Alloy M25 data sheets. ALLOY 165 Alloy 165 rod and bar is used to make bushings, bearings and resistance welding components. Alloy 165 tube is used in crucial telecommunications applications including undersea instrument housings and repeater housings. Alloy 165 plate is used for wear plates and resistance welding components. To learn more about high performance Alloy 165 physical and mechanical properties, forms, sizes and tolerances, download our Alloy 165 Alloy 165 data sheet. COPPER BERYLLIUM SPECIFICATIONS & STANDARDS Below are the specifications and standards set by ASTM International, SAE International, RWMA, European Standard EN, the Japanese Industrial Standard and the Military Standard. Alloy 25 (C17200) Alloy 25 Strip Alloy 25 Rod & Bar Alloy 25 Plate Alloy 25 Tube Alloy 25 Wire Alloy 25 Forgings & Extrusions ASTM B194 ASTM B196 ASTM B194 ASTM B251, ASTM B643, ASTM B197 ASTM B570 AMS 4530, AMS 4532 AMS 4533, AMS 4534, AMS 4650, AMS 4651 AMS 4530, AMS 4533, AMS 4534, AMS 4650, AMS 4651 AMS 4535 AMS 4725 AMS 4650 SAE J461, SAE J463 SAE J461, SAE J463 SAE J461, SAE J463 SAE J461, SAE J463 SAE J461, SAE J463 SAE J461, SAE J463 EN 1654, EN 13148, EN 14436 EN 1654, EN 2163, EN 12165, EN 12167 EN 1654, EN 12163, EN 12165, EN 12167 EN 12166, EN 1654 EN 12163, EN 12420 GB 5233, GB 4431 GB 5233, GB 4431 GB5233, GB3134 JIS H3130 JIS H 3270 JIS H 3130 JIS H 3270 JIS H 3270 RWMA Class 4 RWMA Class 4 RWMA Class 4 RWMA Class 4 BMS 7-353 Type 2 BMS 7-353 Type 2 MIL-C-21657 MIL-C-21657 QQC-533 Alloy M25 Alloy M25 Rod Alloy M25 Wire ASTM B196 ASTM B197 EN 12164 EN 12164, EN 1216 MIL-C-2165 Alloy 165 Alloy 165 Rod & Bar Alloy 165 Plate Alloy 165 Tube Alloy 165 Forgings & Extrusions ASTM B196 ASTM B194 ASTM B570 SAE J461, SAE J463 SAE J461, SAE J463 SAE J461, SAE J463 SAE J461, SAE J463 RWMA Class 4 RWMA Class 4 RWMA Class 4 RWMA Class 4 JIS H 3130 Does your application need the strongest copper beryllium alloy? Contact our engineers and technical staff to find which of these advanced, high strength alloys is right for your application.