6294 3940

Nickel Aluminium Bronze
SKU: C95810
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Common Name:

Propeller Bronze
BS1400: AB2

Typical Chemical Analysis:

Aluminum (Al): 8.5 % - 9.5%
Copper (Cu) : >79.0%
Iron (Fe): 3.5% - 4.5%
Lead (Pb) : <3.0%
Nickel (Ni): 4.0% - 5.0%
Silicon (Si): < 0.1%
Manganese (Mn): 0.8% - 1.5%



Typical Physical Properties:

Hardness (HB): 140 Min.
Tensile Strength: 590 MPa Min.
2% Proof Stress: 240 MPa Min.
Elongation: 15% Min.
Machining rating* (%): 20

 

Fabrication Practices:

Joining /solderability: Not recommended, may be soldered with help of very corrosive flux.
Resistance wielding: Not recommended
Brazing: Not recommended
Oxyacetylene wielding: Not recommended
ARC wielding: Restricted to gas metal-arc and gas tungsten-arc wielding.

 

Background:

Aluminium Bronze has excellent resistance to impingement corrosion and high temperature oxidation. Aluminium Bronze is generally suitable for service in non-oxidizing mineral acids, such as phosphoric, sulphuric & hydrochloric ; organic acids, such as lactic, acetic or oxidic; neutral salt solutions such as sodium or potassium chloride; alkalis, such as sodium hydroxide, potassium hydroxide; and anhydrous ammonium hydroxide and various water, including sea, brackish & potable water.
With the inclusion of Nickel, Nickel Aluminium Bronze demonstrates an even greater resistance to de-alloying and cavitations erosion. Nickel Aluminium Bronze is superior to other copper alloys in resisting erosion in high velocity salt water. Propellers made of Nickel Aluminium Bronze have proven durable in service even in severe conditions. Nickel Aluminium Bronze is approximately 10% lighter than manganese bronze and it can be designed to thinner sections because of its high strength; the lighter propellers make fuel saving possible.

 

Usage:

Propeller hubs, blades and other parts in contact with salt water and fresh water, valve guides and seat in aircraft engines, bearings, gears; cast parts that require strength and toughness

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