M25 Copper Alloy – High‑Performance, Free‑Machining Solution for RF Connectors (ASTM B197 Grade C17300)
Alloy M25 from Materion Performance Alloys is a free machining, high performance copper alloy. M25’s properties minimize signal distortion in coaxial RF connectors and reduce power loss in circular connectors and contact probes. M25 is available in spooled or coiled wire product forms, and in different tempers to accommodate diverse design requirements. After machining and forming operations, M25 parts can be easily heat treated and plated to obtain maximum mechanical and electrical performance. Applications requiring stability to 175° C or reliable contact force in miniaturized designs specify Alloy M25. In demanding electronic applications, M25 provides performance and reliability superior to any free machining copper alloy.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 23.0 °C | 8.36 - 8.8 g/cm³ |
Dimension
| Property | Value | Comment |
|---|---|---|
Diameter | 0.76 - 12.7 mm | Smaller diameter wire may be produced by wire redrawers. |
Mechanical
| Property | Temperature | Value |
|---|---|---|
Elastic modulus | 23.0 °C | 120 - 131 GPa |
Elongation | 23.0 °C | 2 - 25 % |
Tensile strength | 23.0 °C | 620 - 1260 MPa |
Yield strength | 23.0 °C | 1150 MPa |
Yield strength Rp0.2 | 23.0 °C | 510 - 730 MPa |
Thermal
| Property | Temperature | Value |
|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.6E-5 - 1.75E-5 1/K |
Melting point | 870 °C | |
Specific heat capacity | 23.0 °C | 410 J/(kg·K) |
Thermal conductivity | 23.0 °C | 105 - 110 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 23.0 °C | 6.2E-6 - 7.8E-6 Ω·m |
Specific Electrical conductivity | 22 - 28 % IACS |
Chemical properties
| Property | Value | Comment |
|---|---|---|
Aluminium | 0 - 0.2 % | |
Beryllium | 1.8 - 2 % | |
Cobalt | 0.2 % | min. Nickel + Cobalt |
Copper | 95.5 - 97.8 % | Balance |
Iron | 0 - 0.6 % | max., Nickel + Cobalt + Iron |
Lead | 0.2 - 2 % | |
Nickel | 0.2 - 0.6 % | min. Nickel + Cobalt |
Other | 0 - 0.5 % | |
Silicon | 0 - 0.2 % |
Technological properties
| Property | ||
|---|---|---|
| Application areas | Coaxial RF connectors and circular connectors and contact probes. This alloy to be fabricated into contacts for electronics, aircraft and automotive applications. | |
| General machinability | 60% (vs. free-cutting brass) | |
Metal
- ASTM A514 Grade F Low-Carbon Steel – Key Properties & Applications
- ASTM A792 Grade DS – Detailed Material Properties
- ASTM A792 Grade FS – Detailed Steel Specifications
- M25 Alloy Wire – High‑Performance, Free‑Machining Copper for RF Connectors
- High‑Performance Copper Alloy M25 – Ideal for RF Connectors & Precision Applications
- ASTM B197 Grade C17200 TM04 – Premium High‑Strength Copper Alloy with Superior Conductivity
- High-Strength Copper Alloy C17200 (ASTM B197) – Superior Performance & Conductivity
- ASTM B197 Grade C17200 TM08 – Superior Strength & Conductivity Copper Alloy
- ASTM B197 Grade C17300 TD04 – High-Performance Copper Alloy for RF & Coaxial Applications
- High‑Performance M25 Copper Alloy – ASTM B197 Grade C17300 TH04