Cupro Nickel UNS C71500 Sheet, For Construction, Material Grade: 70/30
| Standards |
MIL-C-15726FASME SB-171ASTM B 171 |
| UNS Designation Number |
70-30 (UNS C71500) |
| Nominal Chemicals |
70-30: Copper 69.5%, Nickel 30.0%, Iron 0.5% |
| Machinability |
20 |
| Average Tensile Mechanical Properties |
40000 psi |
| Average Yield Mechanical Properties |
15000 psi |
Widely used in marine applications where resistance to both corrosion and biofouling is important.
C715 Cupro-Nickel is a 70/30 copper-nickel alloy that is almost entirely resistant to stress corrosion and is ideal when used in applications involving high-velocity polluted seawater. Typical 715 CuNi applications for use in the chemical and desalination industries include tubes and tubesheets for condensers, evaporators and heat exchangers; tubes for carrying seawater; valve bodies; pump bodies and impellers.
Related Specifications of 70/30:
- CN107
- C71500
- C71520
- CW354H
- DEF STAN 02-879 Annex B
- DEF STAN 02-780
- NES780
- BS2874
- EN 12164
- ASTM B151
- DGS320
- 2.0882
- CuNi30Mn1Fe
Nominal Composition of 70/30
Cu rem, Ni 30%, Fe 0.7%, Mn 1.0%
Mechanical Properties of 70/30
| Ultimate Tensile Strength (N/mm²) |
Proof Stress (N/mm²) |
Elongation (%) |
Hardness (HB) |
| 310 |
|
27 |
80-120 |
Key Features of 70/30:
- Excellent corrosion and pitting resistance in marine environments
- Good strength and toughness
- Resistance to biofouling
- Readily weldable and fabricated
Applications of 70/30:
Offshore marine: Salt water flanges, salt water piping and pipe fittings, valve bodies, sea water intakes, pipe fittings, water boxes, propeller sleeves, pump bodies and parts
Chemical processing: Heat exchanger and cooling plant, evaporator tubes, distiller tubes, refrigerator and condenser components
Other: Welding backing rings, flexible metal hose, weld wire and boiler parts