Copper Alloy C95800 CONT
Heat-treated state
UNS C95800 · ASTM B148 C95800
CONT = continuous cast bar/tube
Best for machined bushings, shafts, nuts and stock bar where a homogeneous, low-porosity semi-finished form is wanted.
Values for the CONT condition
Other C95800 tempers and conditions
C95800 is listed in 4 conditions; see the grade overview at C95800.
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 |
CONTThis page 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 CONT?
C95800 CONT is C95800 heat treated to CONT — best for machined bushings, shafts, nuts and stock bar where a homogeneous, low-porosity semi-finished form is wanted. C95800 CONT has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 60% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 115 GPa (16.7 Msi). C95800 CONT 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). AC is the default condition FabDigit quotes; CONT is available on request or by drawing note.
Advantages
- Good corrosion resistance — 85/100, 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 — 68/100, better than 82% 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
- Limited formability — 18/100, worse than 75% of copper alloy grades
C95800 CONT properties
Typical room-temperature values for C95800 CONT; 22 are specific to this condition. Other listed values are C95800 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C95800 CONT 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 CONT has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 60% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 115 GPa (16.7 Msi).
Thermal5
C95800 CONT 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 CONT conducts electricity at 7 % IACS, worse than 86% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (85/100), better than 100% of copper alloy grades.
Sustainability4
Producing a kilogram of C95800 CONT 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 CONT's machinability is poor (32/100, worse than 57% of copper alloy grades); weldability good (68/100); formability poor (18/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C95800 CONT
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.
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.
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) | — |
C95800 CONT — frequently asked
What is C95800 CONT used for?
C95800 CONT 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 CONT?
C95800 CONT has a typical yield strength of 290 MPa (42.1 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 60% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C95800 CONT easy to machine?
Not especially — machinability is rated poor (32/100, worse than 57% 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 CONT be welded?
Yes — weldability is rated good (68/100). 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 CONT?
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 CONT 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 CONT?
C95800 CONT 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.