Copper Alloy C95500
UNS C95500 · ASTM B148 C95500 · EN CuAl10Ni5Fe4
C95500 is a high-strength cast nickel-aluminium bronze (10–11.5 % Al, 3–5 % Fe, 3–5.5 % Ni) to ASTM B148; its complex α+κ structure gives strength close to medium-carbon steel together with copper-alloy seawater corrosion resistance and antifouling behaviour.
Values for the As Cast condition
C95500 tempers and conditions
C95500 is supplied in 4 conditions, soft to hard. As Cast is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As CastDefault sand cast, no heat treatment | Default stock condition for propellers, pump/valve castings and bushings where strength ~700 MPa is sufficient. | 300 | 700 | 8 | 192 HB | 8.5 % IACS |
As continuous cast | Standard form for machined bearings, wear plates and gear blanks bought as continuous-cast bar or tube. | 310 | 700 | 10 | 195 HB | 8.5 % IACS |
As centrifugally cast | Choose for hollow cylindrical parts — denser, finer structure than sand cast gives slightly higher strength and hardness. | 315 | 725 | 10 | 200 HB | 8.5 % IACS |
Quench hardened and temper annealed | Pick when maximum strength/hardness and improved dealloying resistance are required, e.g. highly loaded gears, shafts and valve stems. | 415 | 760 | 8 | 22 HRC | 8 % IACS |
What is C95500?
C95500 is a high-strength cast nickel-aluminium bronze (10–11.5 % Al, 3–5 % Fe, 3–5.5 % Ni) to ASTM B148; its complex α+κ structure gives strength close to medium-carbon steel together with copper-alloy seawater corrosion resistance and antifouling behaviour. As-cast it reaches 700 MPa tensile, 300 MPa yield and 192 HB (92 HRB), and it is also supplied heat treated (TQ50) as sand, permanent-mould, centrifugal or continuous castings for propellers, pump casings, impellers, valves, wear bushings and loaded gears. Conductivity is low (8.5 % IACS), machinability is moderate, welding needs preheat and heat-input control, and reducing, sulphur- or ammonia-bearing environments can cause selective dealuminification. C95500 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 1,054°C (1,929 °F). C95500 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 61% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 110 GPa (16 Msi).
What is C95500 used for?
- Valve guides
- Aircraft bushings
- Gears
Advantages
- Lightweight — 7.53 g/cm³ (0.272 lb/in³), better than 96% of copper alloy grades
- Good corrosion resistance — 80/100, better than 96% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
- Readily welded — 60/100, better than 76% of copper alloy grades
Limitations
- Limited ductility — 8%, worse than 83% of copper alloy grades
- Poor heat conductor — 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 80% of copper alloy grades
- Low electrical conductivity — 8.5 % IACS, worse than 79% of copper alloy grades
- Limited formability — 15/100, worse than 79% of copper alloy grades
C95500 properties
Typical room-temperature values for C95500-As Cast; bars are the position among copper alloy grades.
Physical3
C95500 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 1,054°C (1,929 °F).
Mechanical13
C95500 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 61% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
C95500 is rated for continuous service to 300°C (572 °F). It conducts heat at 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 80% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C95500 conducts electricity at 8.5 % IACS, worse than 79% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (80/100), better than 96% of copper alloy grades.
Sustainability4
Producing a kilogram of C95500 takes about 60 MJ of energy and emits 4.2 kg of CO₂ — more than 69% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
C95500's machinability is fair (40/100, better than 57% of copper alloy grades); weldability good (60/100); formability poor (15/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C95500 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C95500
Is C95500 easy to machine?
Machines like a tough steel at ~50 % of AISI 1212 — use rigid setups, positive-rake carbide, moderate speed with heavy feed and flood coolant; avoid dwelling to prevent work hardening.
Can C95500 be welded?
Weldable by GTAW/GMAW with matching NiAl-bronze filler (ERCuNiAl); preheat 150–250 °C for heavy sections, control interpass temperature and avoid dilution with steel.
Can C95500 be formed, bent or molded?
Cast product — sand, centrifugal and continuous casting all standard; needs chilled/directional solidification and good feeding, cold forming not practical.
Manufacturability
The process limits FabDigit applies to C95500. Every C95500 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Fair40 / 100 |
|---|---|
| ISO material group | N.5 |
| Cutting speed (rough / finish) | 180 / 220 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 6× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
C95500 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Al | 10 – 11.5 | 10.7 |
| Fe | 3 – 5 | 4 |
| NiNi + Co | 3 – 5.5 | 4.5 |
| Mn | ≤ 3.5 | 0.5 |
| Siwhere specified | ≤ 0.1 | |
| Cu78.0 % min per ASTM B148 | ≥ 78 (balance) |
What surface finishes work on C95500?
Not anodizable; polish or shot-blast, pickle to remove alumina/oxide skin, and take a stable brown-green patina in seawater — plating requires activated pretreatment.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Plating
Organic Coating
Equivalent designations
Standards and trade names that resolve to Copper Alloy C95500 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B148 C95500
- EN / DIN / Werkstoff-Nr.
- CuAl10Ni5Fe4
- Trade names
- NAB
- Also called
- NiAl Bronze
- Similar grades
- ZCuAl10Fe3Mn2
How much does C95500 cost?
C95500 is a specialty-cost copper alloy ($$$$$), pricier than about 59% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C95500 — frequently asked
What is C95500 used for?
C95500 is typically used for valve guides, aircraft bushings and gears. In short: premium marine propeller alloy.
What is the yield strength of C95500?
C95500 has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 61% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C95500 easy to machine?
Not especially — machinability is rated fair (40/100, better than 57% of copper alloy grades). Machines like a tough steel at ~50 % of AISI 1212 — use rigid setups, positive-rake carbide, moderate speed with heavy feed and flood coolant; avoid dwelling to prevent work hardening.
Can C95500 be welded?
Yes — weldability is rated good (60/100). Weldable by GTAW/GMAW with matching NiAl-bronze filler (ERCuNiAl); preheat 150–250 °C for heavy sections, control interpass temperature and avoid dilution with steel.
What surface finishes work on C95500?
Not anodizable; polish or shot-blast, pickle to remove alumina/oxide skin, and take a stable brown-green patina in seawater — plating requires activated pretreatment.
Can C95500 be formed, bent or molded?
Cast product — sand, centrifugal and continuous casting all standard; needs chilled/directional solidification and good feeding, cold forming not practical.
What is the maximum service temperature of C95500?
C95500 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C95500 As Cast and C95500-TQ50?
As Cast is the default condition — default stock condition for propellers, pump/valve castings and bushings where strength ~700 MPa is sufficient. TQ50: pick when maximum strength/hardness and improved dealloying resistance are required, e.g. highly loaded gears, shafts and valve stems. Yield strength is 300 MPa in As Cast versus 415 MPa in TQ50.
How much does C95500 cost?
C95500 is a specialty-cost copper alloy ($$$$$), pricier than about 59% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Can FabDigit make parts in C95500?
Yes — C95500 is available for CNC machining; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B148 — Standard Specification for Aluminum-Bronze Sand Castings — ASTM International (2019)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- C95500 alloy datasheet — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- DIN EN 1982 / CuAl10Ni5Fe4 (CC333G) cast copper alloys — CEN / DIN (2017)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.