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Plot 10, GIDC Industrial Estate, Udyog Nagar, Jamnagar. India.
Plot 10, GIDC Industrial Estate, Udyog Nagar, Jamnagar. India.
Brass Parts India supplies C95500 nickel aluminium bronze castings to agreed drawings and specifications. C95500 is a copper-aluminium-iron-nickel casting alloy used where its combination of strength, wear resistance and corrosion behaviour suits the application. It is not universally the strongest or most corrosion-resistant copper alloy; grade, heat treatment, casting quality and service conditions must be considered.
Specify material certification, mechanical tests, non-destructive examination and any marine or defence approval required with the enquiry. Availability, acceptance criteria, casting route, lead time and pricing must be confirmed for the quoted part.
C95500 (also called Nickel Aluminum Bronze, NAB, or CDA 955) is a high-strength copper alloy containing 10–11.5% aluminum, 3–5.5% nickel, 3–5% iron, and balance copper. The aluminum forms a tenacious, self-healing aluminum oxide film on the alloy surface that provides exceptional resistance to seawater corrosion, cavitation erosion, biofouling, and most industrial chemicals. The iron and nickel additions refine the microstructure and significantly increase strength, hardness, and wear resistance compared to simpler aluminum bronzes.
C95500 is the alloy of choice for: US Navy ship propellers, pump impellers, valve bodies, and underwater hull fittings per MIL-B-24480 and ASTM B148; offshore oil and gas subsea components; chemical plant pump and valve internals; and heavy industrial bushings and bearings in abrasive mining and construction environments.
Propellers and marine castings require the alloy, heat treatment, mechanical properties and inspection plan specified by the vessel designer and classification society. C95500 and C95800 are distinct nickel aluminium bronze grades; neither should be substituted solely because it is called marine bronze. Confirm casting weight, dimensions and any class approval in the quotation.
Centrifugal pump impellers, pump casings, diffusers, wear rings, and bearing housings in C95500 for seawater cooling pumps, fire fighting pumps, bilge pumps, dredge pumps, and chemical process pumps. Castings from 0.5 kg to 500 kg. C95500’s cavitation resistance (far superior to cast iron or bronze 905) significantly extends impeller life in high-velocity applications. Machined to tight tolerances post-casting for perfect hydraulic balance.
Valve-body suitability depends on the complete valve design, material condition and applicable pressure-temperature standard. Specify the valve standard, design pressure and temperature, fluid, pressure-test method and acceptance criteria. A C95500 alloy designation does not establish a valve pressure class.
Centrifugally cast C95500 bearing sleeves, propeller shaft bushings, rudder pintle bearings, and stern tube bearings for marine applications. Also: wear-resistant bearing plates, slide liners, and guide bushings for mining equipment, press tooling, and heavy construction machinery. C95500’s hardness (≥170 HB) and anti-galling properties provide excellent wear life against steel shafts even without lubrication in flooded or intermittent service.
Subsea valve actuator bodies, underwater hull fittings (sea chests, through-hull fittings, bilge keel attachments), sonar dome frames, and ROV/AUV structural components in C95500. C95500’s biofouling resistance (copper alloys release trace copper ions that inhibit marine organism attachment) is a critical advantage in underwater components, reducing maintenance costs and dry-dock frequency.
For sour-service or other chemically aggressive applications, obtain a project-specific materials assessment. State the fluid composition, temperature, pressure and applicable environmental limits. Do not infer NACE MR0175 / ISO 15156 qualification from the C95500 designation alone.
Any casting shape from your 2D/3D CAD drawing — sand casting, centrifugal casting, or investment (lost-wax) casting depending on geometry and quantity. Pattern/tooling development by Brass Parts India. Pre-production dimensional and chemical analysis reports before full production approval.
| Designation | Standard | Country | Cu % | Al % | Ni % | Fe % | Common Name |
|---|---|---|---|---|---|---|---|
| C95500 / CDA 955 | ASTM B148 / UNS | USA | Balance | 10–11.5% | 3–5% | 3–5% | Nickel Aluminum Bronze (NAB) |
| CC333G | EN 1982 | Europe | Balance | 8.5–10.5% | 4–6% | 3–6% | CuAl10Ni5Fe4 (closest EN equivalent) |
| CuAl10Ni5Fe4 | DIN 1716 / 2.0966 | Germany | Balance | 9–11% | 4–5.5% | 3–5.5% | German Nickel Aluminum Bronze |
| AB2 | BS 1400 | UK | Balance | 8.5–11% | 4–6% | 3.5–5.5% | British Admiralty standard NAB |
| CAC703 | JIS H5120 | Japan | Balance | 9–11% | 4–5.5% | 2.5–5% | Japanese NAB grade |
| C95800 | ASTM B148 / UNS | USA | Balance | 8.5–9.5% | 3.5–4.5% | 3.5–4.5% | NAB – propeller grade; lower Al variant |
| MIL-B-24480 | US Navy Spec | USA | Balance | 10–11.5% | 3.5–5% | 3.5–5% | US Navy propeller alloy specification |
| Property | Sand Cast (As-Cast) | Heat Treated (TQ50) |
|---|---|---|
| Tensile Strength | 620 N/mm² (90 ksi) | 760 N/mm² (110 ksi) |
| Yield Strength (0.2%) | 276 N/mm² (40 ksi) | 380 N/mm² (55 ksi) |
| Elongation | 6–12% | 5–10% |
| Hardness | 170–200 HB | 200–230 HB |
| Charpy Impact | ≥14 J | ≥10 J |
| Density | 7.5 g/cm³ | 7.5 g/cm³ |
| Thermal Conductivity | 36–42 W/m·K | 36–42 W/m·K |
A: Both are nickel aluminum bronzes, but C95800 has slightly lower aluminum (8.5–9.5% vs 10–11.5% in C95500) and lower nickel. C95800 is specifically optimized for marine propeller manufacture — its lower aluminum gives better resistance to dealuminification in seawater and slightly better impact toughness at the expense of some tensile strength. C95500 is used for higher-strength structural and bearing applications. Both are excellent materials; the choice depends on the specific application.
A: C95500 can be used in the as-cast condition for many applications, but heat treatment (anneal at 620°C for stress relief, or solution anneal + quench for maximum properties — TQ50 temper per ASTM B148) significantly improves homogeneity, eliminates casting residual stresses, and increases the alloy’s resistance to stress corrosion cracking. For marine propellers and critical pressure-retaining components, we routinely supply in the TQ50 heat-treated condition.
A: Yes. C95500 can be GTAW (TIG) welded for repair of casting defects and field repairs of marine propellers and valve bodies using appropriate NAB filler metal (AWS A5.7 ERCuNiAl). Preheat to 100–150°C; post-weld heat treatment at 620°C is recommended for critical repairs. All repair welding at Brass Parts India is performed by certified welders per AWS D1.2 or equivalent naval welding procedures.
A: For new patterns: 6–10 weeks (includes pattern making, first casting, dimensional inspection, and mechanical test). Repeat orders using existing patterns: 4–6 weeks production + shipping. Urgent orders with existing patterns: 3–4 weeks possible with airfreight. We recommend maintaining a blanket order with scheduled releases for critical spare parts to minimize downtime risk.
A: Yes. We hold foundry approval for production of marine propeller castings and structural marine castings requiring ABS and DNV GL material certification. The classification society surveyor can witness testing and sign off mill test reports. Please specify the required classification society at time of order so we can arrange the appropriate survey schedule.
Contact Brass Parts India for C95500 / CDA 955 Aluminum Bronze Castings. Email your casting drawing, weight, required quantity, and quality standards to sales@brass-parts-india.com or call +91 22 4344 9300. Competitive CIF pricing to all US seaports. Response within 24 hours.