Overview
Alloy C70250 is a high-performance Alloy that combines strength, conductivity, formability and stress relaxation resistance into a unique set of properties. C70250 has the qualities of some of the Beryllium Coppers without containing any Beryllium. The alloy is a thermally aged material. It achieves its properties by combinations of cold work and heat treatments, all of which is done at the mill. The alloy’s high strength and conductivity combined with its formability and stress relaxation properties make C70250 an excellent electronic alloy, particularly in high temperature environments.
Physical Properties
| Density | 0.318 lb/in³ |
| Electrical Resistivity (Annealed) | 25.9 Ω·cir-mil/ft @ 68 °F |
| Electrical Conductivity (Annealed) | 40% IACS @ 68 °F |
| Thermal Conductivity | 98 Btu/ft²/ft·hr/°F @ 68 °F |
| Modulus of Elasticity (Tension) | 19 ksi |
| Melting Point (Solidus) | 1,700 °F |
| Melting Point (Liquidus) | 1,900 °F |
| Annealing Range (Min) | -18 °C |
| Annealing Range (Max) | -18 °C |
| Density | 8.94 gm/cm³ |
| Electrical Resistivity (Annealed) | 4.31 µΩ·cm @ 20 °C |
| Electrical Conductivity (Annealed) | 0.23 MS·cm @ 20 °C |
| Thermal Conductivity | 170 W/m·K @ 20 °C |
| Modulus of Elasticity (Tension) | 131 Mpa |
| Melting Point (Solidus) | 927 °C |
| Melting Point (Liquidus) | 1,038 °C |
Round Wire
| TEMPER NAME | TEMPER CODE | TENSILE STRENGTH (ksi) |
MILL LIMITS (inch) |
|
| Min | Max | |||
| 1/2 Hard | TL02 | 80.0 | 100 | .0010 - .1285 inch |
| 3/4 AT | TL03 | 100 | 120 | |
| 1/2 AT + SR | TR02 | 88.0 | ||
| AM | TM00 | 90.0 | 110 | |
| 1/2 HM | TM02 | 95.0 | 120 | |
| 3/4 HM | TM03 | 100 | 125 | |
| TEMPER NAME | TEMPER CODE | TENSILE STRENGTH (Mpa) |
MILL LIMITS (mm) |
|
| Min | Max | |||
| 1/2 Hard | TL02 | 550 | 690 | .0254 - 3.264 mm |
| 3/4 AT | TL03 | 680 | 830 | |
| 1/2 AT + SR | TR02 | 600 | ||
| AM | TM00 | 620 | 760 | |
| 1/2 HM | TM02 | 650 | 830 | |
| 3/4 HM | TM03 | 680 | 870 | |
Square Wire
| TEMPER NAME | TEMPER CODE | TENSILE STRENGTH (ksi) |
MILL LIMITS (inch) |
|
| Min | Max | |||
| 1/2 Hard | TL02 | 80.0 | 100 | .0100 - .0808 inch |
| 3/4 AT | TL03 | 100 | 120 | |
| 1/2 AT + SR | TR02 | 88.0 | ||
| AM | TM00 | 90.0 | 110 | |
| 1/2 HM | TM02 | 95.0 | 120 | |
| 3/4 HM | TM03 | 100 | 125 | |
| TEMPER NAME | TEMPER CODE | TENSILE STRENGTH (Mpa) |
MILL LIMITS (mm) |
|
| Min | Max | |||
| 1/2 Hard | TL02 | 550 | 690 | .2540 - 1.905 mm |
| 3/4 AT | TL03 | 680 | 830 | |
| 1/2 AT + SR | TR02 | 600 | ||
| AM | TM00 | 620 | 760 | |
| 1/2 HM | TM02 | 650 | 830 | |
| 3/4 HM | TM03 | 680 | 870 | |
