Nickel Aluminum Bronze
C95800 — Nickel-Aluminum Bronze (Marine Grade)
The principal cast nickel-aluminum bronze for sea-water service, valued for strength with strong resistance to corrosion, cavitation and erosion.
Grade overview
C95800 is the cast nickel-aluminum bronze (NAB) most often associated with marine engineering. Controlled additions of nickel, iron and manganese on an aluminum-bronze base give a combination of strength, toughness and resistance to corrosion and cavitation in sea water that few copper alloys can match.
It is widely used for propellers, pump and valve bodies, seawater piping components and fittings and other parts in sea-water handling. The alloy depends on proper foundry practice and, in many cases, heat treatment to achieve the intended microstructure – so documentation and inspection matter for critical parts.
Alloy family and identification
Cast copper-aluminum-nickel-iron-manganese alloy, UNS C95800, commonly referred to as nickel-aluminum bronze or NAB. Not the same as wrought C63000.
| Item | Detail |
|---|---|
| UNS designation | C95800 |
| Common name | Nickel-Aluminum Bronze (Marine Grade) |
| Alloy family | Nickel Aluminum Bronze |
| Type | Cast copper-aluminum-nickel-iron-manganese alloy |
Typical composition
| Element | Nominal limit, wt % |
|---|---|
| Copper (Cu) | 79.0 min |
| Aluminum (Al) | 8.5 – 9.5 |
| Iron (Fe) | 3.5 – 4.5 |
| Nickel (Ni, incl. Co) | 4.0 – 5.0 |
| Manganese (Mn) | 0.8 – 1.5 |
| Silicon (Si) | 0.10 max |
| Zinc (Zn) | 0.20 max |
| Lead (Pb) | 0.03 max |
Reference data only – typical or nominal values from published specifications, not a guarantee of supplied material. Confirm against the current edition of the applicable specification, the product form and condition, and the material test certificate. Technical review by the company is required before publication or reliance.
Typical mechanical properties
Mechanical property values are intentionally not published here. They vary with specification, product form, size and temper or condition and will be added only once the governing specification and condition are confirmed. Request the applicable specification or test certificate with your inquiry.
Physical properties
Physical properties (density, thermal and electrical data) are not listed until verified against an authoritative datasheet. Contact us for current reference data.
Corrosion and wear considerations
Strong resistance to sea-water corrosion, cavitation and erosion-corrosion when correctly cast and heat treated; generally good galling resistance. Performance depends on fluid velocity, design, microstructure and operating conditions – it is not guaranteed for every service.
Machinability and fabrication
Machinable but tough; use rigid setups and appropriate tooling. Welding and repair of NAB follow specific qualified procedures, often with post-weld heat treatment.
Common industrial applications
- Sea-water pump and valve bodies
- Marine fittings and pipe components
- Propellers and thruster components (as cast parts)
- Heat-exchanger and offshore hardware
- Heavy-duty bushings and wear parts
Examples only. Suitability must be confirmed for the actual operating environment.
Available product forms
- Nickel Aluminum Bronze Rod — C95800
- Nickel Aluminum Bronze Plate — C95800 (availability subject to confirmation)
- C95800 Nickel Aluminum Bronze Fittings
- C95800 Nickel Aluminum Bronze Flanges
Sizes, tolerances and stock are not published and must be confirmed with the company.
Relevant products
Standards and specifications
- ASTM B148 – aluminum-bronze sand castings
- ASTM B271/B271M – centrifugal castings
- ASTM B505/B505M – continuous castings
- MIL-B-24480 – nickel-aluminum bronze castings (where specified)
Verify against the current edition and the exact product form before specifying.
Certification and inspection options
Material test certificates, chemical analysis, dimensional reports and third-party inspection can be requested with your inquiry. What can be supplied for C95800 is confirmed with the company for each order; no certificate is implied by this page.
Related grades
Frequently asked questions
Is C95800 suitable for all sea-water uses?
It is a well-established sea-water alloy, but suitability depends on fluid velocity, design, microstructure and operating conditions. Confirm for the specific service.
What documentation is relevant?
Chemical analysis, mechanical test reports and third-party inspection are commonly requested. What can be supplied is confirmed with the company.
Need C95800 in a specific form?
Share your grade, dimensions, quantity and technical requirements with our team.