DIN 17730 G‑NiCu30Si3 Cast Alloy: Superior Corrosion & Erosion Resistance
The nickel-copper alloys show very good resistance to sea water and possesse good corrosion-resistance against non-oxidizing inorganic acids, especially against sulphuric, hydrofluoric and phosphorous acid, against most organic acids and especially against alkaline solutions. Furthermore, they are of excellent resistance to erosion and cavitation. The material G-NiCu30Si3 shows only low galling and fouling in running against other metallic materials, so that the abrasion-resistant materal shows good bearing properties. The strength properties are substantially higher than those of G-NiCu30Nb (2.4365), but they are lower than those of G-NiCu30Si4(2.4368). The material is not weldable. G-NiCu30Si3 is applied in shipbuilding, in the chemical industry, in the oil, paper and food industry, for pickling plants, washing machines, as castings for pumps and pump components, fittings, valves and valve seats, nozzles, turbine blades, guide rails, sliding elements and bearings. The casting is well suitable for stress in terms of pressure-tightness.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 8.5 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 23.0 °C | 120 - 156 GPa | Typical for Nickel Copper Alloy |
Elongation | 20.0 °C | 10 % | |
Hardness, Brinell | 20.0 °C | 220 [-] | |
Tensile strength | 20.0 °C | 650 MPa | |
Yield strength Rp0.2 | 20.0 °C | 350 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.1E-5 - 1.6E-5 1/K | Typical for Nickel Copper Alloy |
Melting point | 1170 - 1365 °C | Typical for Nickel Copper Alloy | |
Specific heat capacity | 23.0 °C | 418 - 540 J/(kg·K) | Typical for Nickel Copper Alloy |
Thermal conductivity | 23.0 °C | 16 - 45 W/(m·K) | Typical for Nickel Copper Alloy |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 0.5 - 1.5 % |
Carbon | 0.25 % |
Copper | 27 - 33 % |
Iron | 1 - 2.5 % |
Lead | 0.01 % |
Magnesium | 0.12 % |
Nickel | 61 - 68 % |
Silicon | 2.7 - 3.7 % |
Sulfur | 0.01 % |
Titanium | 0.2 % |
Technological properties
| Property | ||
|---|---|---|
| Processing methods | sand casting, separately cast test sample | |
Metal
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