Copper Alloy C95520-TQ50
Supply condition · default condition
UNS C95520
TQ50 = quench hardened and tempered
Standard ASTM B148 supply condition — pick for maximum strength and hardness in heavy-duty marine and hydraulic castings.
Values for the TQ50 condition
Other C95520 tempers and conditions
C95520 is listed in 2 conditions; see the grade overview at C95520.
- M01
- TQ50
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 |
TQ50DefaultThis page 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 |
What is C95520-TQ50?
C95520-TQ50 is C95520 supplied in the TQ50 condition — standard ASTM B148 supply condition — pick for maximum strength and hardness in heavy-duty marine and hydraulic castings. C95520-TQ50 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). C95520-TQ50 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).
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-TQ50 properties
Typical room-temperature values for C95520-TQ50; 12 are specific to this condition. Other listed values are C95520 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C95520-TQ50 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-TQ50 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-TQ50 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-TQ50 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-TQ50 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-TQ50'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. Confirm any required mill or lot documentation when quoting.
Working with C95520-TQ50
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.
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.
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) | — |
C95520-TQ50 — frequently asked
What is C95520-TQ50 used for?
C95520-TQ50 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-TQ50?
C95520-TQ50 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-TQ50 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-TQ50 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-TQ50?
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-TQ50 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-TQ50?
C95520-TQ50 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.