Nickel Aluminium Bronze
Nickel Aluminium Bronze is Copper alloy based material with the addition of;
- Aluminium (Al)
- Iron (Fe)
- Nickel (Ni)
- Manganese
These materials are also known as Aluminium Bronze or NAB
Common Material Specifications
Cu Al9 Fe5 Ni5
- ASTM B148 UNS C95800
- BS1400: AB2
- EN1982: CC333G
Others
- ASTM B148 UNS C95500 (10/4/2)
- ASTM B148 UNS C95400 (11/4)
- ASTM B148: 10 alloys in total
Typical Properties
- Tensile 580-640 N/mm2
- Yield 240-250 N/mm2
- Elongation 13- 15%
- Hardness HB140
- Density 7.6 g/cm3
- Good castability, reasonable bearing material, easy machining, high strength
- P/T Ratings Shipham SPT01 19 bar for class 150
- EN1759-3:2003 15.5 bar class 150
Corrosion Properties
- Good for seawater service
- Especially good for pitting corrosion, stress corrosion and corrosion fatigue
- Good fouling resistance
Additional Uses & Comments
- Variety of wrought specifications available, good for trim material
- Low magnetic permeability
- Non-sparking; can be used for oxygen service
- Reasonable thermal and electrical conductivity
- Good Castabilty with suitable design
- Weldable
- Can be heat treated to improve seawater corrosion properties
Cautions
- Low modulus of elasticity, but good yield stress
- Raised face flanges non-standard
- High temperature use
- Observe pressure ratings at higher temperatures
- Should not be used in polluted / H2S containing seawater (in common with 316 Stainless)
