What is C95800?
C95800 is a high-strength cast nickel aluminium bronze, nominal CuAl8Ni5Fe4Mn, used widely in marine, offshore and heavy engineering. It combines impact strength, excellent seawater corrosion resistance, outstanding wear and abrasion resistance, good cavitation and erosion resistance and anti-galling behaviour, and is heat treatable. It is specified for propellers, shafts, valves, pumps, gears and seawater systems.
Should you specify C95800?
Specify C95800 when the component is a casting that lives in seawater and has to survive both corrosion and mechanical wear. It is the default cast nickel aluminium bronze for propellers, seawater pump and valve bodies, and offshore structural castings, and it is heat treatable where higher properties are needed.
Against C95500, Copper Alloys note that C95800 typically offers improved strength and enhanced resistance to seawater corrosion, so if you are choosing between the two for a new seawater casting, C95800 is usually the safer default. C95500 remains the right answer where an existing AB2 or C95500 drawing has to be matched.
Where different mechanical or compositional characteristics are needed, the wrought grades C63000 and C63200 are the alternatives to look at. A wrought product gives more consistent properties and easier volumetric inspection than any casting, so if your part is a pressure boundary or fatigue critical, price the wrought route before defaulting to a casting.
The practical constraint is section size and casting integrity, not the alloy. Get the foundry involved in the casting method and the inspection standard at drawing stage.
Best for cast seawater components - propellers, pump and valve bodies, gears and structural castings - where corrosion and wear both matter.
C95800 quick reference
Typical, indicative values as published by Copper Alloys Ltd. Typical values are not specification limits, and vary with product form, section size and temper.
| Alloy type | Cast - Cast nickel aluminium bronze |
|---|---|
| Nominal composition | CuAl8Ni5Fe4Mn |
| Tensile strength (typical) | 590 N/mm² |
| Proof / yield strength (typical) | 250 N/mm² |
| Elongation (typical) | 18 % |
| Hardness (typical) | 159 HB |
| Izod impact (typical) | 27 J at 20 °C |
C95800 typical physical properties
Key features of C95800
- Good strength, wear resistant and corrosion resistant.
- The alloy is heat treatable.
- High tensile strength, typically 580-660 MPa.
- Excellent seawater corrosion resistance, with good resistance to cavitation and erosion.
- Anti-galling properties for moving components.
C95800 applications
Components
- Gears and worm wheels
- Valve guides and seats
- Structural applications
Typical industries
- Marine and offshore components - propellers, shafts, seawater systems
- Oil and gas equipment - valves, pumps and pressure components
- Industrial machinery - bearings, bushings and gears
- Defence and aerospace - high-load and safety-critical components
C95800 equivalent specifications
Frequently asked questions
Need C95800 for your project?
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Information provided is for reference only
The composition, mechanical and physical figures on this page are typical, indicative values compiled from published Copper Alloys Ltd datasheets to aid early-stage material selection. They are not specification limits and are not engineering, procurement, safety, regulatory or design advice.
Before specifying, purchasing or using any material, confirm the requirements against the current controlled version of the relevant standard and obtain a certified material test report and written technical confirmation from Copper Alloys Ltd or another qualified foundry.