Copper Alloy C95520
UNS C95520
C95520 is a high-strength nickel-aluminum bronze casting alloy supplied quench-and-tempered (TQ50), including as centrifugal castings.
Reference datasheet — C95520 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 TQ50 condition
C95520 tempers and conditions
C95520 is supplied in 2 conditions, soft to hard. TQ50 is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As sand cast | Untreated foundry state — used only for low-stress parts or as the stock condition before heat treatment. | 415 | 760 | 8 | 20 HRC | 8 % IACS |
TQ50Default Quench hardened and tempered | Standard ASTM B148 supply condition — pick for maximum strength and hardness in heavy-duty marine and hydraulic castings. | 725 | 965 | 6 | 32 HRC | 7 % IACS |
Supply forms, finishes and certifications
Ways C95520 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
TQ50-CEN | TQ50 | Surface finish |
What is C95520?
C95520 is a high-strength nickel-aluminum bronze casting alloy supplied quench-and-tempered (TQ50), including as centrifugal castings. Heat treatment produces 725 MPa yield, 965 MPa tensile, 6% elongation and 302 HB (32 HRC) with a corrosion-resistance rating of 80, giving the cavitation and seawater erosion resistance needed for propellers, pump bodies and other marine components. Ductility and conductivity are low (6% elongation, 7% IACS), service is capped near 300 °C, and welding softens the heat-affected zone, so C95800/C95820 are preferred where weldability outweighs strength. C95520 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 1,044°C (1,911 °F). C95520 has a yield strength of 725 MPa (105 ksi) and a tensile strength of 965 MPa (140 ksi) — stronger than 97% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 117 GPa (17 Msi).
What is C95520 used for?
- Ship propellers
- Pump/valve bodies
- Seawater components
Advantages
- High strength — 725 MPa (105 ksi), better than 97% of copper alloy grades
- 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
Limitations
- Limited ductility — 6%, worse than 89% of copper alloy grades
- 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
- Limited formability — 15/100, worse than 79% of copper alloy grades
C95520 properties
Typical room-temperature values for C95520-TQ50; bars are the position among copper alloy grades.
Physical3
C95520 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 1,044°C (1,911 °F).
Mechanical15
C95520 has a yield strength of 725 MPa (105 ksi) and a tensile strength of 965 MPa (140 ksi) — stronger than 97% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C95520 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
C95520 conducts electricity at 7 % IACS, worse than 86% 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 C95520 takes about 60 MJ of energy and emits 4.2 kg of CO₂ — more than 69% of copper alloy grades. Typical recycled content is 35%.
Manufacturability7
C95520's machinability is poor (28/100, worse than 78% of copper alloy grades); weldability fair (45/100); 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. C95520 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C95520
Is C95520 easy to machine?
Machine with rigid setups, sharp carbide (K10/K20) at moderate speeds and heavy positive feed; the hard κ phases abrade tooling and the alloy work-hardens if rubbed.
Can C95520 be welded?
GTAW/GMAW with matching Ni-Al-bronze filler (ERCuNiAl / AWS A5.7) works, but the quench-and-temper strength is lost in the HAZ — re-heat-treat critical parts and preheat 150–250 °C.
Can C95520 be formed, bent or molded?
Casting alloy only: bottom-gate and filter the mould to avoid alumina film inclusions; chill heavy sections and allow ample feeding to limit shrinkage porosity.
C95520 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 | 10.5 – 11.5 | 11 |
| NiNi + Co | 4.2 – 6 | 5 |
| Fe | 4 – 5.5 | 4.7 |
| Mn | ≤ 1.5 | 0.8 |
| Co | ≤ 0.2 | |
| Cr | ≤ 0.05 | |
| Si | ≤ 0.15 | |
| Sn | ≤ 0.25 | |
| Zn | ≤ 0.3 | |
| Pb | ≤ 0.03 | |
| Curemainder, 74.5 % min | ≥ 74.5 (balance) |
What surface finishes work on C95520?
Not anodizable; it self-passivates to a protective alumina/oxide film — polish, shot-blast or leave as machined, and avoid coupling to steel without insulation or cathodic protection.
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).
How much does C95520 cost?
C95520 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.
C95520 — frequently asked
What is C95520 used for?
C95520 is typically used for ship propellers, pump/valve bodies and seawater components. In short: highest-strength cast bronze; 302 HB after TQ50; cavitation-resistant marine alloy.
What is the yield strength of C95520?
C95520 has a typical yield strength of 725 MPa (105 ksi) and a tensile strength of 965 MPa (140 ksi) — stronger than 97% of copper alloy grades. Strength varies by condition: see the 2 listed tempers.
Is C95520 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 78% of copper alloy grades). Machine with rigid setups, sharp carbide (K10/K20) at moderate speeds and heavy positive feed; the hard κ phases abrade tooling and the alloy work-hardens if rubbed.
Can C95520 be welded?
With care — weldability is rated fair (45/100). GTAW/GMAW with matching Ni-Al-bronze filler (ERCuNiAl / AWS A5.7) works, but the quench-and-temper strength is lost in the HAZ — re-heat-treat critical parts and preheat 150–250 °C.
What surface finishes work on C95520?
Not anodizable; it self-passivates to a protective alumina/oxide film — polish, shot-blast or leave as machined, and avoid coupling to steel without insulation or cathodic protection.
Can C95520 be formed, bent or molded?
Casting alloy only: bottom-gate and filter the mould to avoid alumina film inclusions; chill heavy sections and allow ample feeding to limit shrinkage porosity.
What is the maximum service temperature of C95520?
C95520 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 C95520-TQ50 and C95520-M01?
TQ50 is the default condition — standard ASTM B148 supply condition — pick for maximum strength and hardness in heavy-duty marine and hydraulic castings. M01: untreated foundry state — used only for low-stress parts or as the stock condition before heat treatment. Yield strength is 725 MPa in TQ50 versus 415 MPa in M01.
How much does C95520 cost?
C95520 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 B271 — Copper-Base Alloy Centrifugal Castings — ASTM International (2020)
- CDA Alloy Database — C95520 — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties of Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (Copper Alloys in Seawater) — ASM International (2005)
- GB/T 1176 (ZCuAl10Fe5Ni5 ) (2013)
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.