Overview
Copper alloys have very good resistance to seawater, brine water, organic compounds, salts, diluted non-oxidizing acids, and more. CuNi 90/10 (C70600 & C7060X) is a Copper Nickel Iron alloy with a small content of manganese which allows excellent resistance to sea- and brakish water. Of all commercial coper alloys, CuNi 70/30 (C71500) offers the best resistance to aqueous corrosion. It is resistant to acid solutions and highly resistant to stress corrosion cracking, and impingement corrosion. In addition, CuNi70/30 offers a greater strength for higher pressures.
Specification
| Trade Name | UNS | Copper Nickel Industry Specifications | Chemical Composition | Min.Tensile (KSI) | Min.Yield (KSI) | Elongation % |
|---|---|---|---|---|---|---|
| CuNi 90/10 | UNS C70600 UNS C70620 | ASME SB111, SB171, SB359, SB395, SB466, SB467, SB543 ASTM B111, B122, B151, B171, B359, B395, B432, B466, B467, B543, B608 DIN 2.0872 MIL C-15726, T-15005, T-16420, T-22214 SAE J461, J463 | Cu 88.6 min Pb .05 max* Fe 1.8 max Zn 1 max* Ni 9-11 max Mn 1.0 max | 38 | 15 | 30 |
| CuNi 90/10 | UNS C7060X | EEMUA 144 90/10, 145 90/10, 14 90/1 | Cu rem. Pb .01 max Fe 1.5-2.0 Zn 0.2 max P 0.2 max S 0.2 max Ni 10-11 Mn 0.5-1.0 | 40 | 15 | 30 |
Mechanical Properties of C70600 *
| Form | Temper | Temper Code | Tensile Strength (ksi) | YS-0.2% Offset (ksi) | YS-0.5% Ext (ksi) | Elongation (%) | Rockwell B scale | Rockwell F scale | Rockwell 30T scale |
|---|---|---|---|---|---|---|---|---|---|
| * Measured at room temperature, 68°F (20°C). | |||||||||
| Bar | Hard | H04 | 50 Typ | 25 Typ | 15 Typ | ||||
| Soft Anneal | O60 | 38 Min | 15 Typ | 30 Typ | |||||
| Flat Products | 1/4 Hard | H01 | 53 Typ | 16 Typ | 35 Typ | 60 Typ | |||
| As Hot Rolled | M20 | 40 Min for Standard | 15 Typ | 30 Min for Standard | 3 Min for Standard | ||||
| Hard | H04 | 75 Typ | 73 Typ | 5 Typ | 80 Typ | ||||
| Tube | Annealed | O61 | 44 Typ | 16 Typ | 42 Typ | 15 Typ | 65 Typ | 26 Typ | |
| Light Drawn, Light Cold Rolled | H55 | 45 Min for Standard | 10 Typ | 72 Typ | 100 Typ | 70 Typ | |||
Physical Properties of C70600
| Melting Point - Liquidus°F | 2100 |
|---|---|
| Melting Point - Solidus°F | 2010 |
| Densitylb/cu in. at 68°F | 0.323 |
| Specific Gravity | 8.94 |
| Electrical Conductivity% IACS at 68°F | 9 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F | 26 |
| Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) | 9.5 |
| Specific Heat CapacityBtu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tensionksi | 18000 |
| Modulus of Rigidityksi | 6800 |
