Aluminium Bronze
An introduction to aluminium bronze
Aluminium bronzes are principally alloys of copper and aluminium.
In addition to aluminium, which ranges from 5 to 14 %, other most commonly used alloying elements are nickel, iron, manganese, silicon and tin.
Three principle types of aluminium bronzes are available:
- The low alloy, single-phase alpha alloys contain less than 8 % aluminium, have a good ductility and are well suited for cold working into tube, sheet and wire products.
- Two-phase or duplex alloys contain from 8 to 11 % aluminium and are usually additionally alloyed with iron and nickel to achieve higher strength. The increased aluminium content causes the appearance of the relatively harder beta phase, resulting in higher strength and hardness.
- Copper-aluminium-silicon alloys with aluminium contents of about 6 % and additionally silicon contents of up to 2 % are called silicon-aluminium bronzes. Originally developed for the manufacture of propellers, these alloys feature improved foundry properties and application properties, especially good resistance to impact and cavitation.
Aluminium bronzes standards and specifications
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BS B23
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WL 2.0966
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DTD 197*
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MSRR 8503
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Rolls-Royce
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AMS 4640
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WL 2.0966
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UA10N
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NF L14-705
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ASN-A 3406
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Airbus
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WL 2.0978
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UA11N
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ASN-A 3315
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Airbus
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NF L14-706
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BS B24
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UE9P
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DTD 265A*
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NF L14-703
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WL 2.1504
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AMS 4880
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