Aluminum bronze
As aluminum bronze a golden yellow, is castable and forgeable copper alloy with aluminum , respectively. The aluminum content is usually between 9% and 14%. Other common alloying elements are iron , manganese and nickel . The five and ten pfennig coins minted in the German Reich from 1923 to 1939 and the fifty pfennig coins minted there from 1923 to 1925 consisted of such an alloy . Sometimes an aluminum powder suspension is also referred to as aluminum bronze as a paint.
Characteristic values and properties
density | approx. 7400..8200 kg / m³ |
modulus of elasticity | approx. 110,000 N / mm² |
Thermal conductivity | approx. 56 W / (m * K ) |
spec. Heat capacity | approx. 350 J / (kg * K) |
Coefficient of thermal expansion | approx. 17 · 10 −6 / K |
Stretch limit | approx. 275 N / mm² |
tensile strenght | approx. 550 N / mm² |
Shear modulus | approx. 85,000 N / mm² |
Poisson's number | 0.3 |
Further properties (depending on the alloy composition)
- wear-resistant
- resistant to sea water, corrosion , scaling , erosion and cavitation
- heat resistant up to approx. 400 ° C
Usage examples
Ship propellers, sliding elements, bearings, shafts, screws, nuts, bolts, worm wheels, worms, gears, chemical industry, coins
literature
- Reinhold Hinzmann: Non-ferrous metals. First part, copper - brass - bronze - gunmetal, second edition, Springer Verlag, Berlin 1941.
- Alfred Kopecky, Rudolf Schamschula: Mechanical Technology. Fourth revised edition, Springer Verlag, Vienna 1977.
See also
Web links
Commons : Aluminum bronze - collection of images, videos and audio files
- List of different alloys with density and properties
- Copper-aluminum alloys (accessed August 26, 2019)
- Investigation of the microstructure of an aluminum bronze (accessed on August 26, 2019)
- Studies on the recycling of aluminum bronze in the metalworking industry (accessed on August 26, 2019)
- Volume deficits of castings made of copper and copper cast materials (accessed on August 26, 2019)