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AuNi18: High-Performance Gold Vacuum Brazing Alloy

Gold-based vacuum-brazing alloy. Gold brazing alloys are characterized by high corrosion resistance and good mechanical stability. They are used in turbine construction, in engine construction, in nuclear technology and in space technology. In many cases, the alloy AuNi18 has proven itself. Special reliability of the brazed joint guarantee high oxidation resistance and strength of the gold brazing alloys up to> 800°C, low hardness, good formability, good wetting and flow properties, high corrosion resistance under atmospheric conditions against aggressive media and low erosion tendency. The material is used as a vacuum hard solder (soldering range 950 to 1000°C) (turbine construction, transmitter tubes, aerospace, engine construction).

Properties

General

PropertyTemperatureValue

Density

20.0 °C

15.96 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

23.0 °C

74 - 81 GPa

Typical for Gold

Elongation

20.0 °C

8 %

Poisson's ratio

23.0 °C

0.42 [-]

Typical for Gold

Shear modulus

23.0 °C

26 GPa

Typical for Gold

Yield strength

20.0 °C

550 - 650 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

1.4E-5 1/K

Typical for Gold

Melting point

1064 °C

Typical for Gold

Specific heat capacity

23.0 °C

126 - 138 J/(kg·K)

Typical for Gold

Thermal conductivity

23.0 °C

292 - 316 W/(m·K)

Typical for Gold

Electrical

PropertyTemperatureValue

Electrical conductivity

20.0 °C

5.90E+6 S/m

Electrical resistivity

20.0 °C

1.69E-7 Ω·m

Chemical properties

PropertyValue

Gold

82 %

Nickel

18 %


Metal

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