70/30 Copper Nickel Sheet is expensive as compared with other alloys with similar mechanical properties and copper-aluminum alloys. They are medium high strength and good creep resistance at high temperatures.70/30 Copper Nickel Plate hot working capacity is rated as good with the suitable hot working temperature being between 927°C - 1038°C. Cuni 70/30 Sheet/ Cuni 70/30 Plate is known for strength, workability, weldability and formability. The addition of small amounts of manganese and iron makes it ideal for use in applications which involves high-velocity polluted seawater. They are almost entirely resistant to stress corrosion. Cu-Ni 70/30 Plate is been used where high corrosion resistance is required and where concern over chloride stress-corrosion cracking prevents use of stainless steels.
They are mainly used for seawater service as forged and machined pump and valve components, hardware and fittings. ASTM B122 C71500 is useful in severe corrosive conditions in which service lives longer than those of other copper alloys are desired. It has the excellent resistance of any of the copper alloys to impingement attack and to corrosion from most waters and acids. 70 30 Cu Ni Plate hashigher content of nickel compared to 90 10 Cu Ni which gives enhanced mechanical properties, whilst still maintaining the excellent corrosion properties. C71500 Plate / C71500 Sheet has moderately high strength, good creep resistance at elevated temperatures. And have excellent corrosion resistance, especially in marine environments.
Specification Schedule of Copper Nickel 70/30 Sheets & Plates
| Specifications |
ASTM / ASME SB122 |
| Standard |
GB/T5231-2001, GB/T1527-2006, JISH3100-2006, JISH3250-2006, JISH3300-2006, ASTMB152M-06, ASTMB187, ASTMB75M-02, ASTMB42-02, etc. |
| Size |
1000 mm x 2000 mm, 1220 mm x 2440 mm, 1500 mm x 3000 mm, 2000 mm x 2000 mm, 2000 mm x 4000 mm |
| Thickness |
0.1mm to 12 mm Thk |
| Length Cut to Size |
10mm~12000mm, or as required. |
| Form |
Cuni 70/30 Sheet, Coil, Plate, Foils, Rolls, Plain Shim Sheet, Strip, Flats, Blank (Circle), Ring (Flange), Pata, Patti |
| Finish |
Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
| Hardness |
Soft, Hard, Quarter Hard, Half Hard, Spring Hard etc. |
| Surface |
Mill, polished, bright, oiled, hair line, brush, mirror, sand blast, or as required. |
Chemical Properties of Copper Nickel 70/30 Sheets & Plates
| Grade |
Cu |
Mn |
Pb |
Ni |
Fe |
Zn |
| Cupro Nickel 70/30 |
65 min |
1.0 max |
0.05 max |
29-33 max |
0.4-1.0 max |
1 max |
| Density |
Melting Point |
Tensile Strength |
Yield Strength (0.2%Offset) |
Elongation |
| 0.323 lb/in3 at 68 F |
2260 F |
50000 psi |
20000 psi |
30 % |
Equivalent Standard of Copper Nickel 70/30 Sheets & Plates
| STANDARD |
WERKSTOFF NR. |
UNS |
| Cupro Nickel 70/30 |
2.0882 |
C71500 |
