Alloy Selection
BERYLCO Casting Alloy Selection Table
| UNS Alloy No. | BERYLCO Alloy | Composition in % (Bal. Cu.) | Pouring Temp Range °F | Melting Range °F | Characteristics & Application |
|---|---|---|---|---|---|
| C82000 | 10C | Be 0.45-0.80 Co 2.40-2.70 | 2050-2250 | 1855-1955 | High conductivity, good strength and good high temperature properties. Meets RWMA Class 3 requirements. |
| C82200 | 14C | Be 0.35-0.80 Ni 1.00-2.00 | 2050-2250 | 1840-1960 | High conductivity, good strength and good high temperature properties. Excellent resistance welding material. Meets RWMA Class 3 requirements. |
| C82400 | 165C * | Be 1.60-1.85 Co 0.20-0.65 | 1900-2050 | 1650-1825 | High strength, hardness, with good resistance to corrosion. Suitable for salt water immersion applications. Excellent replication of intricate detail. |
| C82500 | 20C * | Be 1.90-2.25 Co 0.35-0.70 Si 0.20-0.35 | 1850-2050 | 1575-1800 | High strength, hardness, wear resistance and excellent fluidity. Ideal for investment, shell, sand, ceramic castings. Meets requirements for Class 4 RWMA resistance welding. Excellent replication of intricate detail. |
| C82510 | 21C | Be 1.90-2.15 Co 1.00-1.20 Si 0.20-0.35 | 1850-2350 | 1575-1800 | An excellent fine grain structure, particularly where superheating is necessary to flow metal in long thin sections. Produces a superior as-cast finish when exceeding normal pouring temperatures of other beryllium copper casting alloys. Properties are similiar to 20C. Meets RWMA Class 4 requirements. May be cast in same types of molds as 20C. |
| C82600 | 245C * | Be 2.25-2.55 Co 0.35-0.65 Si 0.20-0.35 | 1850-2000 | 1575-1750 | High strength, hardness, wear resistance and excellent fluidity. Low pouring temperature is ideal for pressure and permanent mold applications. |
| C82800 | 275C * | Be 2.50-2.85 Co 0.35-.070 Si 0.20-0.35 | 1825-1925 | 1575-1700 | Highest strength and hardness of BeCu alloys; excellent wear resistance and fluidity. For extremely fine detail pick-up in ceramic or pressure cast processes. Lowest pouring temperature of BeCu alloys allows most any type of molding process to be used. |
* When fine grain castings are required, 0.02 to 0.12 Ti can be added to the above chemistries. The designation would then be CT.
Specifications
BERYLCO castings ingots are formulated to meet all appropriate U.S. Government, ASTM, AMS, and ICI requirements.
Ingots are available in standard 5 pound sizes. Other ingot weights may be custom produced.