The Element of Trust.
Alloys
CDA Copper No. C 155 00
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SuperSilverCopper-155TM
COMPOSITION(%)
| Nominal | Minimum | Maxiumum | |
|---|---|---|---|
| Copper (inc Silver) | — | 99.75 | — |
| Silver | — | .027 | .10 |
| (8)* | (30)* | ||
| Phosphorus | .06 | .040 | .080 |
| Magnesium | .11 | .08 | .13 |
*Troy ounce per avoirdupois ton = 0.0034%
PHYSICAL PROPERTIES
| English Units | C.G.S. Units | |
|---|---|---|
| Melting Point (Liquidus) | 1,980°F | 1,082°C |
| Melting Point (Solidus) | 1,960°F | 1,071°C |
| Density | .322 lb./cu. in. a 68°F | 8.91 gm./cu. cm. a 20°C |
| Specific Gravity | 8.91 | 8.91 |
| Coefficient of Thermal Expansion | .0000098 per °F from 68°F to 212°F | .0000177 per °C from 20°C to 100°C |
| Thermal Conductivity | 200 Btu./sq. ft./ft./hr./°F @ 68°F | 83 cal/sq. cm/cm/seC/°C @ 20°C |
| Electrical Resistivity (Annealed) | 10.0 Ohms (circ. mil./ft.) @ 68°F | 1.83 Microhm-cm @ 20°C |
| Electrical Conductivity* (Annealed) | 94% IACS @ 68°F | .545 Megohm-cm @ 20°C |
| Thermal Capacity (Specific Heat) | .092 Btu./lb./°F @ 68°F | .092 cal/gm./°C @ 20°C |
| Modulus of Elasticity (Tension) | 17,000,000 psi | 12,000 Kg/sq. mm |
| Modulus of Rigidity | 6,400,000 psi | 4,500 Kg./sq. mm. |
| Magnetic Permeability | Less than 1.002 gauss/oersted |
*Volume basis after precipitation heat treatment
MECHANICAL PROPERTIES
| Size Section | Temper (Nominal Yield Strength 1000 psi) | Nominal Tensile Strength psi | Nominal Yield Strength | Elongation in 2” % | Nominal Rockwell Hardness | Fatigue Strength | |||
|---|---|---|---|---|---|---|---|---|---|
| .5% Ext. psi | .2% Offset psi | 15-T | 30-T | psi | Million Cycles | ||||
| Flat Products | |||||||||
| .015 in. | Soft | 40,000 | 18,000 | 17,800 | 32 | 63 | — | 15,000 | 100 |
| 35 | 45,000 | 35,000 | 34,800 | 25 | 74 | 50 | — | — | |
| 45 | 50,000 | 42,000 | 42,000 | 18 | 78 | 54 | — | — | |
| 50 | 50,000 | 46,000 | 45,800 | 10 | 80 | 57 | — | — | |
| 55 | 60,000 | 52,000 | 52,000 | 10 | 82 | 68 | — | — | |
| 60 | 60,000 | 57,000 | 57,000 | 6 | 84 | 72 | 21,500 | 100 | |
| 65 | 70,000 | 62,000 | 62,000 | 8 | 86 | 75 | — | — | |
| 70 | 70,000 | 67,000 | 67,000 | 3 | 87 | 78 | 21,500 | 100 | |
| 75 | 80,000 | 75,000 | 75,000 | 2 | 88 | — | — | — | |
The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.
