C95500 Nickel Aluminum Bronze Bushing Manufacturer
Cast CuAl10Ni5Fe4 (UNS C95500) bushings for seawater service, heavy loads and high-impact machinery — centrifugal or continuous cast to ASTM B505, available as-cast or TQ50 heat-treated, machined to your drawing.
When a bushing must survive immense loads, corrosive seawater or high-impact duty cycles, standard bearing bronzes often fall short. C95500 nickel aluminum bronze closes that gap: roughly 10% aluminum for strength and a self-repairing oxide film, 4% nickel for cavitation resistance, and 4% iron for wear resistance. The result is a cast alloy that carries compressive loads tin bronzes cannot, in environments that corrode them quickly.
At VIIPLUS we cast and machine C95500 bushings to order — sleeve, flanged, thrust washer and split forms — with material certificates traced to actual heat chemistry. Send a drawing or inquiry and we will confirm grade, temper and tolerance before quoting.
What is C95500 nickel aluminum bronze (CuAl10Ni5Fe4)?
C95500 is a cast copper alloy, not a wrought one. Its standard naming depends on the system you are working in:
| System | Designation | Notes |
|---|---|---|
| UNS (USA) | C95500 | Unified Numbering System for metals |
| EN 1982 / CEN | CC331G (cast), CW304G (wrought equivalent) | European; alloy symbol CuAl10Ni5Fe4 |
| DIN (legacy) | DIN 1714 / 2.0975 | DIN 1714 was superseded by DIN EN 1982; many catalogues still use the older number |
| JIS (Japan) | HBsC4 / HBsC4C | Used by Japanese foundries |
| GB/T (China) | CuAl10Ni5Fe4 (ZCuAl10Fe5Ni5 cast) | Mainland Chinese grade; chemical limits are very close to C95500 |
| AMS | AMS 4880, AMS 4881 | Aerospace Materials Specification for heat-treated bar and continuous-cast stock |
All of these names refer to the same composition class with minor allowed variations on iron and nickel. The C95500 limits in ASTM B505/B505M-23 are the most widely quoted; if you order to EN 1982 CC331G, the limits fall within the C95500 envelope.
Chemical composition and ASTM B505 limits
The composition ranges below are taken from ASTM B505/B505M-23 for the as-cast, centrifugal-cast and continuous-cast product forms used in bushing production. Copper plus the named elements must equal at least 99.5 %.
| Element | Symbol | Min (%) | Max (%) | Purpose in the alloy |
|---|---|---|---|---|
| Copper | Cu | 78.0 | balance | Matrix; sets baseline conductivity and ductility |
| Aluminium | Al | 10.0 | 11.5 | Forms the protective Al2O3 film; primary strengthener |
| Nickel (incl. Co) | Ni | 3.0 | 5.5 | Refines the alpha-K grain; slows cavitation-erosion in water |
| Iron | Fe | 3.0 | 5.0 | Forms Fe-Al intermetallics that pin grain boundaries and resist wear |
| Manganese | Mn | — | 3.5 | Deoxidiser; ties up sulphur; minor grain refiner |
| Silicon | Si | — | 0.10 (typical, not always specified) | Controlled residual; high Si degrades toughness |
| Tin, lead, zinc | Sn, Pb, Zn | — | 0.50 each (typical cast limits) | Tramp residuals; not intentionally added |
Aluminium at 11 % or higher pushes the alloy toward the brittle gamma-2 phase if cooling is too slow, which is why foundries keep iron content high enough to suppress that phase. Out-of-spec iron (low) leads to coarse grain and low impact resistance; out-of-spec nickel (low) drops the cavitation-erosion rating sharply. When we quote a new bushing drawing, we ask for a heat-cast certificate so we can verify the actual chemistry before machining.
Mechanical properties in as-cast and TQ50 conditions
C95500 is normally sold in one of two conditions. Both are covered by ASTM B505/B505M-23; the values below are the minimum specified for the heat-treated (TQ50) temper and the typical values for the as-cast condition.
| Property | Unit | As-cast (typical) | TQ50 / heat-treated (min, ASTM B505/B505M-23) |
|---|---|---|---|
| Tensile strength, Rm | MPa (ksi) | 655 (95) | 758 (110) |
| Yield strength at 0.5 % EUL, Rp0.5 | MPa (ksi) | 290 (42) | 427 (62) |
| Elongation in 50 mm | % | 10 | 8 |
| Brinell hardness (HBW, 3000 kg) | HB | 190 | 228 |
| Machinability rating (free-cutting brass C36000 = 100) | % | 50 | |
The TQ50 temper is the heat-treated state: solution treat at 870 to 915 °C (1600 to 1675 °F) for one hour per inch of section, water quench, then age at 620 to 660 °C (1150 to 1225 °F). The temper raises the tensile and yield strengths roughly 15 to 20 % over the as-cast state, with a small drop in elongation. For bushing sleeves that see a steady high load and slow rotation (valve guides, propeller-shaft fairings), TQ50 is the recommended condition. For sleeves that need to absorb shock (pin joints in mobile equipment), as-cast is usually specified because it gives a bit more ductility.
Physical properties and thermal behaviour
| Property | US customary | Metric |
|---|---|---|
| Density | 0.272 lb/in³ | 7.53 g/cm³ |
| Solidus / liquidus | 1900 °F / 1930 °F | 1038 °C / 1054 °C |
| Coefficient of thermal expansion (20 – 300 °C) | 9.0 × 10-6 /°F | 15.5 × 10-6 /°C |
| Thermal conductivity | 24.2 Btu/(ft·h·°F) | 41.9 W/(m·K) |
| Electrical conductivity | 8 % IACS | 0.049 MS/m |
| Specific heat capacity | 0.10 Btu/(lb·°F) | 419 J/(kg·K) |
| Modulus of elasticity | 16 000 ksi | 110 GPa |
| Poisson ratio | 0.32 | |
| Magnetic permeability (as-cast / TQ50) | 1.32 / 1.20 | |
Two of these numbers matter most for bushing design. The thermal-expansion coefficient is roughly 30 % higher than that of carbon steel, so a long C95500 sleeve fitted into a steel housing must be allowed clearance for axial growth or be seated with slotted / oval mounting holes. The 8 % IACS conductivity is low enough that the bushing will not promote galvanic heating on a steel shaft, but the alloy is still more noble than steel and will behave as the cathode in any unintended steel-to-C95500 electrolyte path; the bushing should be electrically isolated or the assembly should be sealed against electrolyte ingress.
Equivalent specifications and cross-references
| Standard | Title | Applies to |
|---|---|---|
| ASTM B148 | Sand castings of copper alloys | Heavy section bushings, hub-shaped blanks |
| ASTM B271 | Centrifugal castings of copper alloys | Sleeve-type bushings with sound outer fibres |
| ASTM B505 / B505M | Continuous castings of copper alloys | Bar and tube stock for finish machining |
| AMS 4880 | Nickel-aluminum bronze, continuous cast | Aerospace bar, pin bearings |
| AMS 4590 | Nickel-aluminum bronze, sand cast | Aerospace housings, large bushings |
| SAE J461 / J462 | Wrought and cast copper alloys | Chemistry, mechanical and physical data sheets |
| QQ-C-390 (legacy) | Federal copper-alloy castings spec | Replaced by ASTM in most new designs |
| EN 1982 CC331G | European cast copper-alloy designation | EU procurement documentation |
High-Performance C95500 Nickel Aluminum Bronze Bushings: The Ultimate Solution for Extreme Environments
Why Choose C95500 Nickel Aluminum Bronze?
C95500 is one of the non-ferrous alloys available. By incorporating roughly 10% Aluminum, 4% Iron, and 4% Nickel, this alloy creates a dense, protective oxide film that thrives in environments where others succumb to cavitation and erosion.
Key Performance Drivers:
Technical Specifications & Standards
We manufacture our C95500 bushings to the most rigorous global standards to ensure interchangeability and reliability.
| Standard | Designation |
| ASTM Standard | ASTM B148 (Sand Cast), ASTM B505 (Continuous Cast) |
| UNS Number | UNS C95500 |
| DIN Equivalent | DIN 1714 (CuAl10Ni5Fe4) |
| Typical Hardness | 190 – 230 HBW (As Cast/Heat Treated) |
Precision Tolerances：
We provide high-precision machining with standard fits to ensure seamless integration:
-
External Diameter (OD): ISO m6 / s6 (Press fit)
-
Internal Diameter (ID): ISO g6 / f7 (Running clearance)
Manufacturing Excellence of C95500 Nickel Aluminum Bronze Bushing
Centrifugal Casting
Produces a dense, fine grain structure with low porosity.
Crucial for maximizing fatigue resistance and impact performance in high-load bearing sleeves.
Comparative Analysis: C95500 vs. The Competition
Understanding why C95500 is the premium choice for “High strength bronze bushings” requires a direct comparison.
| Feature | C95500 (Ni-Al Bronze) | C95400 (Al-Bronze) | C93200 (SAE 660 Tin Bronze) |
| Tensile Strength | High (Up to 760 MPa) | Moderate (585 MPa) | Low (240 MPa) |
| Hardness (HBW) | 190+ | 170 | 70 |
| Impact Loading | Excellent | Good | Poor |
| Corrosion (Marine) | Outstanding | Moderate | Poor |
| Best For: | Landing Gear / Offshore | General Industrial | Low-load / Light Duty |
The Difference Maker: While C95400 is common, the Nickel addition in C95500 significantly improves the grain structure, making it far more resistant to the “pitting” and “de-aluminification” found in harsh salt-spray environments.
C95500 Bushing Applications
Nickel aluminum bronze earns its place wherever salt water, heavy load or impact meet slow sliding speed:
- Marine & offshore — propeller-shaft sleeves, rudder and stern-gear bushes, valve trim and underwater hardware. See our sliding bearings for marine and offshore range.
- Construction equipment — as-cast pin-joint bushes in excavator arms and linkages, chosen for impact ductility. Related: excavator bushings.
- Crushing & heavy machinery — eccentric and socket liners in cone crushers and high-load pivots. Related: cone crusher bushings.
- Steel rolling mills — heavy-section sleeves in mill units and auxiliary equipment. Related: bushings for steel rolling mills.
- Hydropower — gate trunnion and guide bushes in TQ50 condition. Related: hydropower bearings.
Nickel aluminum bronze earns its place wherever salt water, heavy load or impact meet slow sliding speed:
- Marine & offshore — propeller-shaft sleeves, rudder and stern-gear bushes, valve trim and underwater hardware. See our sliding bearings for marine and offshore range.
- Construction equipment — as-cast pin-joint bushes in excavator arms and linkages, chosen for impact ductility. Related: excavator bushings.
- Crushing & heavy machinery — eccentric and socket liners in cone crushers and high-load pivots. Related: cone crusher bushings.
- Steel rolling mills — heavy-section sleeves in mill units and auxiliary equipment. Related: bushings for steel rolling mills.
- Hydropower — gate trunnion and guide bushes in TQ50 condition. Related: hydropower bearings.
Besides plain sleeves, we regularly supply the following C95500 forms:
Straight sleeve bushing
Flanged bushing
Thrust washer
wear plate
Split bearing
Equivalent Specifications and Cross-References
| Standard | Title | Applies to |
|---|---|---|
| ASTM B148 | Sand castings of copper alloys | Heavy-section bushings, hub-shaped blanks |
| ASTM B271 | Centrifugal castings of copper alloys | Sleeve bushings with sound outer fibres |
| ASTM B505 / B505M | Continuous castings of copper alloys | Bar and tube stock for finish machining |
| AMS 4880 | Nickel-aluminum bronze, continuous cast | Aerospace bar, pin bearings |
| AMS 4590 | Nickel-aluminum bronze, sand cast | Aerospace housings, large bushings |
| SAE J461 / J462 | Wrought and cast copper alloys | Chemistry, mechanical and physical data sheets |
| EN 1982 CC331G | European cast copper-alloy designation | EU procurement documentation |
More specialty grades are compared on our special bronze alloys page.
C95500 Bushing FAQ
Our C95500 Nickel Aluminum Bronze Bushings are trusted in critical systems worldwide
Case Study: Offshore Pin Joint Upgrade
A drilling platform operator replaced standard bronze with C95500 bushings in a high-load joint exposed to salt spray and shock.
30% Wear Reduction
Achieved after the same operating hours.
Lower Maintenance
Longer grease intervals and fewer emergency changeouts.
