Brass Parts India manufactures and exports precision C95500 Aluminum Bronze Castings (also designated CDA 955, UNS C95500, or Nickel Aluminum Bronze) from our sand casting, centrifugal casting, and investment casting facility in Jamnagar, India — supplying marine, defense, oil and gas, pump, valve, mining, and heavy industrial customers in the USA and worldwide. C95500 Nickel Aluminum Bronze is the highest-strength, most corrosion-resistant copper alloy available in cast form, and is the premier material for marine propellers, impellers, pump bodies, valve bodies, bearing housings, and structural components operating in seawater, acids, and abrasive environments.
Brass Parts India delivers C95500 castings with full mechanical property certification, NDT testing, and US Navy / AMS / ASTM compliance documentation — the quality standard demanded by US defense, offshore, and marine OEMs. Export pricing: USD 4.00 – USD 25.00/kg CIF US seaport for standard sand castings; higher for centrifugal and investment castings depending on complexity.
What is C95500 Aluminum Bronze (CDA 955)?
C95500 (also called Nickel Aluminum Bronze, NAB, or CDA 955) is a high-strength copper alloy containing 10–11.5% aluminum, 3–5% 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.
C95500 Aluminum Bronze Casting Products We Manufacture
Marine Propellers in C95500 Nickel Aluminum Bronze
Fixed pitch propellers, controllable pitch propeller (CPP) blades, bow thruster propellers, and stern thruster hubs in C95500 NAB. Manufactured by sand casting from 5 kg to 2,000 kg single-piece weight. Dimensional accuracy per ISO 484 Class S/I/II; blade surface finish improved by hand finishing and precision grinding. Used by commercial shipping, naval vessels, coast guard, ferries, offshore vessels, and recreational mega-yachts. C95500 is the alloy specified by virtually all classification societies (ABS, DNV GL, Lloyd’s, Bureau Veritas) for marine propellers.
C95500 Pump Impellers and Pump Bodies
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.
C95500 Marine Valve Bodies and Gate Valves
Gate valve bodies, globe valve bodies, butterfly valve discs, check valve bodies, and sea cock bodies for marine and offshore service in C95500. Manufactured to ASTM B148, ASME B16.34, and MSS SP-80 standards. Pressure ratings up to ANSI Class 600. Hydro-tested per ASME Section VIII requirements. Preferred over cast iron and duplex stainless in marine environments due to C95500’s unique combination of seawater corrosion resistance, biofouling resistance, and ease of dezincification-free service.
C95500 Bearings, Bushings, and Wear Plates
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.
C95500 Underwater and Subsea Components
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.
C95500 Oil and Gas Subsea Equipment
Subsea wellhead components, valve trim components, choke body parts, and chemical injection fittings in C95500 for deep-water oil and gas production. C95500 resists H₂S (hydrogen sulfide) stress corrosion cracking better than many stainless steels, making it valuable in sour gas service. Manufactured to NACE MR0175 / ISO 15156 requirements for H₂S service on request.
Custom C95500 Castings to Drawing
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.
C95500 Material Grade and International Equivalents
| 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 |
Mechanical Properties of C95500 Aluminum Bronze
| 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 |
Casting Processes Available
- Sand Casting: Most economical; castings from 0.5 kg to 10,000 kg; good for complex shapes with internal cavities
- Centrifugal Casting: Superior for cylindrical parts (bushings, bearing sleeves, rings, cylinder liners) — eliminates porosity in critical wall sections; density and mechanical properties superior to sand casting
- Investment Casting (Lost-Wax): Best dimensional accuracy (CT5–CT7); excellent surface finish Ra 3.2–6.3 µm; for complex near-net-shape parts reducing post-machining costs
- Post-Casting Machining: Full CNC turning, milling, drilling, and grinding services for all castings — delivered fully finished to your dimensional drawing
Quality, Testing, and Certification
- Chemical Analysis: Spectrometric analysis per ASTM E478 on every heat — certified to ASTM B148 / UNS C95500 composition requirements
- Mechanical Testing: Tensile, yield, elongation, and hardness per ASTM A370 — test bars cast from each heat
- NDT: Radiographic (X-ray) per ASTM E94, UT (ultrasonic) per ASTM E114, Liquid Penetrant per ASTM E165 — as specified by customer
- Pressure Testing: Hydrostatic or pneumatic pressure tests on valve and pump bodies as specified
- Classification Society Approval: ABS, DNV GL, Lloyd’s Register, Bureau Veritas foundry approval available for marine castings
- US Navy Compliance: MIL-B-24480 compliance reports available for defense contracts
- ISO 9001:2015 QMS with full casting traceability from melt to finished part
Applications of C95500 Aluminum Bronze Castings
- Marine propellers — fixed pitch, CPP, bow/stern thruster
- Seawater pump impellers and casings
- Marine valve bodies (gate, globe, butterfly, sea cock)
- Stern tube and rudder pintle bearings
- Offshore oil and gas subsea components
- Chemical plant pump and valve internals
- Mining crusher and conveyor wear parts
- Power generation turbine components
- Desalination plant impellers and valve bodies
- Defense and US Navy hull and propulsion fittings
Why Choose Brass Parts India for C95500 Aluminum Bronze Castings?
- Dedicated Aluminum Bronze Foundry: Specialized C95500/C95800 NAB melting and casting capability — separate from brass melting to prevent contamination.
- US Military and Navy Standards: MIL-B-24480 material compliance and documentation for US defense procurement requirements.
- Classification Society Foundry: ABS and DNV GL foundry approval for marine propeller and pump castings.
- Full Casting + Machining: One-stop supply — raw casting through fully finished machined component, eliminating the customer’s need to source a separate machine shop.
- NDT Capability: In-house radiographic, UT, and liquid penetrant testing with interpretation by certified Level II/III inspectors.
- Competitive Pricing: USD 4.00–USD 25.00/kg CIF US ports — 30–50% below European and US foundry prices for equivalent quality.
- ISO 9001 and Traceability: Every casting traceable to its heat melt record, chemical analysis, and mechanical test results.
Frequently Asked Questions – C95500 Aluminum Bronze Casting
Q1: What is the difference between C95500 and C95800?
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.
Q2: Does C95500 need heat treatment?
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.
Q3: Can C95500 be welded for repair?
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.
Q4: What is the typical lead time for C95500 sand castings?
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.
Q5: Can you supply C95500 castings with ABS or DNV classification society certification?
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.
Request a Quote
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.
