Beryllium Copper C17510 Class III
Copper Alloy No. C17510
Beryllium Copper , RWMA Class 3
Chemical Composition % by weight
Beryllium Copper , RWMA Class 3
Chemical Composition % by weight
| Copper (incl. Silver) | Iron | Nickel | Cobalt | Silicon | Beryllium | Aluminum |
| 97.8 Nominal | .10 Maximum | 1.4 Minimum | .30 Maximum | .20 Maximum | .20 Minimum | .20 Maximum |
Material Properties
Precipitation hardened alloy with good thermal conductivity and high hardness. Not suitable for case hardening or nitrating.
Applications
Hardware: Fuse clips, fasteners, springs, switch parts, relay parts, electrical conductors.
Industrial: Welding equipment.
Mechanical Properties
Typical for rod in HT temper
| Hardness* | Rockwell B Scales | 98 |
| Tensile Strength** | KSI | 115 |
| Yield Strength** | KSI | 110 |
| Elongation** | % in 2 inch | 14 |
*Hardness conversions are approximate
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
| Thermal Conductivity | BTU/ (sq ft-ft-hr-F) | 120-150 |
| Specific Heat | BTU/lb/ºF @ 68F | .10 |
| Thermal Expansion | Per °F from 68 F to 392 F | .0000098 |
| Density | lb/cu in @ 68 F | .317 |
| Electrical Conductivity* (Annealed)** | % IACS @ 68 F | 45-48 |
| Modulus of Elasticity | KSI | 19,000 |
*Cold worked and precipitation hardened condition
**Volume basis
Fabrication Properties
| Capacity for being cold worked | Excellent |
| Capacity for being hot formed | Good |
| Hot forgeability rating (forging brass=100) | - |
| Hot working temperature | 1200-1625 F or 650-765 C |
| Machinability rating (Free Cutting Brass=100) | - |
| Solution heat treating temperature | 1675-1725 F or 900-950 C |
| Suitability for being joined by: | Soldering/Good |
| Brazing/Good | |
| Oxyacetylene Welding/Not Recommended | |
| Gas Shielded Arc Welding/Fair | |
| Coated Metal Arc Welding/Fair | |
| Resistance Welding | Spot/Good |
| Seam/Fair | |
| Butt/Fair |