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C70260
| Elements | ||||
|---|---|---|---|---|
| Cu(1,2) | P | Ni(3) | Si | |
|
(1) Cu value includes Ag. (2) Cu + Sum of Named Elements 99.5% min. (3) Ni value includes Co. |
||||
| Min (%) | 1.0 | 0.20 | ||
| Max (%) | Rem | 0.01 | 3.0 | 0.7 |
| Form | Temper | Temper Code | Tensile Strength (ksi) |
YS-0.2% Offset (ksi) |
Elongation (%) |
Fatigue Strength** (ksi) |
Section Size (in) |
|---|---|---|---|---|---|---|---|
| * Measured at room temperature, 68°F (20°C). ** Fatigue Strength: 100 x 106 cycles, unless indicated as [N] x 106. | |||||||
| Flat Products | Hard | H04 |
70 Typ |
68 Typ |
4 Typ |
0.02 | |
| Spring | H08 |
97 Typ |
90 Typ |
6 Typ |
35 Typ | 0.02 | |
| Melting Point - Liquidus°F | 1940 |
|---|---|
| Melting Point - Solidus°F | 1905 |
| Densitylb/cu in. at 68°F | 0.32 |
| Specific Gravity | 8.86 |
| Electrical Conductivity% IACS at 68°F | 40 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F | 90 |
| Coefficient of Thermal Expansion 68-39210 to -6 power per °F (68 – 392°F) | 9 |
| Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) | 10 |
| Specific Heat CapacityBtu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tensionksi | 19000 |
| Modulus of Rigidityksi | 7200 |
| Technique | Suitability |
|---|---|
| Soldering | Good |
| Brazing | Good |
| Oxyacetylene Welding | Good |
| Gas Shielded Arc Welding | Good |
| Coated Metal Arc Welding | Fair |
| Spot Weld | Good |
| Seam Weld | Good |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Good |
| Capacity for Being Hot Formed | Excellent |
| Forgeability Rating | 40 |
| Machinability Rating | 30 |
Common Fabrication Processes
- Bending
- Forming
- Stamping
Thermal Properties
No thermal properties for this alloy
| Product Category | Product | Reason Category | Reason |
|---|---|---|---|
| Electrical | Springs | Conductivity (Electrical) | Electrical Conductivity |
| Springs | Mechanical Properties | Strength | |
| Terminals | Conductivity (Electrical) | Electrical Conductivity | |
| Terminals | Mechanical Properties | Stiffness | |
| Terminals | Mechanical Properties | Strength | |
| Industrial | Contact Springs | Conductivity (Electrical) | Electrical Conductivity |
| Contact Springs | Mechanical Properties | Stiffness | |
| Contact Springs | Mechanical Properties | Strength |
| Form | Specific Sub-Form | Application | System | Standard | Description |
|---|---|---|---|---|---|
| Sheet & Strip | ASTM | B422/B422M | COPPER-ALUMINUM-SILICON-COBALT ALLOY AND COPPER-NICKEL-ALUMINUM-SILICON ALLOY SHEET AND STRIP | ||
| Strip | ASTM | B888/B88M | COPPER ALLOY STRIP FOR USE IN MANUFACTURE OF ELECTRICAL CONNECTORS OR SPRING CONTACTS |
Corrosion Properties
No Corrosion Properties Available.