Copper Alloy C95800
UNS C95800 · ASTM B148 C95800
C95800 is a nickel-aluminium bronze casting alloy (ZCuAl9Fe4Ni4Mn2, ASTM B148 C95800) alloyed with roughly 9 % aluminium plus iron, nickel and manganese for seawater corrosion resistance and high strength.
Reference datasheet — C95800 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AC condition
C95800 tempers and conditions
C95800 is supplied in 4 conditions, soft to hard. AC 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 |
|---|---|---|---|---|---|---|
Temper annealed 675 °C / 6 h, air cool | Choose for naval/propeller and long-life seawater service — the anneal breaks up continuous β phase and maximises resistance to dealuminification and SCC. | 265 | 630 | 25 | 155 HB | 7.5 % IACS |
ACDefault Spheroidize annealed | Standard stocked condition for general marine castings, pump housings and valve bodies where full temper-anneal certification is not required. | 275 | 655 | 22 | 159 HB | 7 % IACS |
Continuous cast bar/tube | Best for machined bushings, shafts, nuts and stock bar where a homogeneous, low-porosity semi-finished form is wanted. | 290 | 655 | 18 | 170 HB | 7 % IACS |
Centrifugally cast | Pick for rings, sleeves, bushings and pump wear parts needing denser, finer-grained, higher-strength sound sections. | 300 | 690 | 20 | 170 HB | 7 % IACS |
What is C95800?
C95800 is a nickel-aluminium bronze casting alloy (ZCuAl9Fe4Ni4Mn2, ASTM B148 C95800) alloyed with roughly 9 % aluminium plus iron, nickel and manganese for seawater corrosion resistance and high strength. It is the standard choice for propellers, seawater pumps and valve bodies, produced as sand, centrifugal and continuous castings and often supplied temper-annealed, with 655 MPa tensile strength, 275 MPa yield, 22 % elongation and 159 HB. Machinability is low at about 30 % of free-cutting brass, the alumina film demands careful gating, and galvanic isolation from steel is required; C95300 is the lower-cost alternative where seawater exposure is limited. C95800 has a density of 7.64 g/cm³ (0.276 lb/in³), lighter than 92% of copper alloy grades. It melts at 1,043°C (1,909 °F). C95800 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 57% of copper alloy grades. Elongation at break is 22% and the elastic modulus is 115 GPa (16.7 Msi).
What is C95800 used for?
- ship propellers
- seawater pump housings
- valve bodies
- offshore hardware
Advantages
- Good corrosion resistance — 84/100, better than 100% of copper alloy grades
- Lightweight — 7.64 g/cm³ (0.276 lb/in³), better than 92% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
- Readily welded — 70/100, better than 85% of copper alloy grades
Limitations
- Low electrical conductivity — 7 % IACS, worse than 86% of copper alloy grades
- Poor heat conductor — 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 80% of copper alloy grades
- High embodied carbon — 4.5 kg CO₂/kg, worse than 79% of copper alloy grades
C95800 properties
Typical room-temperature values for C95800-AC; bars are the position among copper alloy grades.
Physical3
C95800 has a density of 7.64 g/cm³ (0.276 lb/in³), lighter than 92% of copper alloy grades. It melts at 1,043°C (1,909 °F).
Mechanical15
C95800 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 57% of copper alloy grades. Elongation at break is 22% and the elastic modulus is 115 GPa (16.7 Msi).
Thermal5
C95800 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
C95800 conducts electricity at 7 % IACS, worse than 86% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (84/100), better than 100% of copper alloy grades.
Sustainability4
Producing a kilogram of C95800 takes about 65 MJ of energy and emits 4.5 kg of CO₂ — more than 81% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
C95800's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability very good (70/100); formability poor (20/100).
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. C95800 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C95800
Is C95800 easy to machine?
Tough, gummy chip — use sharp positive-rake carbide, rigid setups, 30–60 m/min with flood coolant; rating ~30 % of free-cutting brass.
Can C95800 be welded?
Readily welded by GTAW/GMAW with ERCuNiAl-A2 filler; preheat 150–200 °C for heavy sections, limit interpass to ~200 °C and re-temper-anneal weld repairs for seawater service.
Can C95800 be formed, bent or molded?
A casting alloy — sand, centrifugal and continuous cast; use bottom gating and filters to avoid alumina film defects, and generous risers because of the narrow freezing range.
C95800 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 | 8.5 – 9.5 | 9 |
| NiNi + Co | 4 – 5 | 4.5 |
| FeFe content shall not exceed Ni content | 3.5 – 4.5 | 4 |
| Mn | 0.8 – 1.5 | 1.1 |
| Si | ≤ 0.1 | |
| Pb | ≤ 0.03 | |
| Curemainder; ASTM B148 specifies 79.0 % min | ≥ 79 (balance) |
What surface finishes work on C95800?
Not anodizable; grind/polish or shot blast, then rely on the natural passive film, cathodic protection or antifouling paint schemes; avoid direct coupling to steel without isolation.
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).
Equivalent designations
Standards and trade names that resolve to Copper Alloy C95800 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B148 C95800
- Similar grades
- ZCuAl9Fe4Ni4Mn2
How much does C95800 cost?
C95800 is a high-cost copper alloy ($$$$), pricier than about 78% 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.
C95800 — frequently asked
What is C95800 used for?
C95800 is typically used for ship propellers, seawater pump housings, valve bodies and offshore hardware. In short: highest-strength marine cast bronze; excellent seawater corrosion resistance; hardest to machine of the family.
What is the yield strength of C95800?
C95800 has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 57% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C95800 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Tough, gummy chip — use sharp positive-rake carbide, rigid setups, 30–60 m/min with flood coolant; rating ~30 % of free-cutting brass.
Can C95800 be welded?
Yes — weldability is rated very good (70/100). Readily welded by GTAW/GMAW with ERCuNiAl-A2 filler; preheat 150–200 °C for heavy sections, limit interpass to ~200 °C and re-temper-anneal weld repairs for seawater service.
What surface finishes work on C95800?
Not anodizable; grind/polish or shot blast, then rely on the natural passive film, cathodic protection or antifouling paint schemes; avoid direct coupling to steel without isolation.
Can C95800 be formed, bent or molded?
A casting alloy — sand, centrifugal and continuous cast; use bottom gating and filters to avoid alumina film defects, and generous risers because of the narrow freezing range.
What is the maximum service temperature of C95800?
C95800 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 C95800-AC and C95800 CENT?
AC is the default condition — standard stocked condition for general marine castings, pump housings and valve bodies where full temper-anneal certification is not required. CENT: pick for rings, sleeves, bushings and pump wear parts needing denser, finer-grained, higher-strength sound sections. Yield strength is 275 MPa in AC versus 300 MPa in CENT.
How much does C95800 cost?
C95800 is a high-cost copper alloy ($$$$), pricier than about 78% 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.
Sources
- ASTM B148 — Aluminum-Bronze Sand Castings — ASTM International (2019)
- ASTM B505/B505M — Continuous Cast Copper Alloys — ASTM International (2022)
- ASTM B271 — Centrifugally Cast Copper-Base Alloys — ASTM International (2018)
- MIL-B-24480 / NAVSEA nickel-aluminum bronze castings — US DoD (1991)
- GB/T 1176 (ZCuAl9Fe4Ni4Mn2) (2013)
- CDA Alloy Datasheet C95800 — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
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.