Copper Alloy C95500 · supply condition
Copper Alloy C95500-TQ50
Properties of the TQ50 condition, compared with the other C95500 tempers.
Pick when maximum strength/hardness and improved dealloying resistance are required, e.g. highly loaded gears, shafts and valve stems.
What is C95500-TQ50?
C95500-TQ50 is C95500 supplied in the TQ50 condition — pick when maximum strength/hardness and improved dealloying resistance are required, e.g. highly loaded gears, shafts and valve stems. C95500-TQ50 has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 82% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 110 GPa (16 Msi). C95500-TQ50 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 1,040°C (1,904 °F). As Cast is the default condition FabDigit quotes; TQ50 is available on request or by drawing note.
Advantages
- Lightweight — 7.53 g/cm³ (0.272 lb/in³), better than 96% of copper alloy grades
- Good corrosion resistance — 76/100, better than 91% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 84% of copper alloy grades
- High strength — 415 MPa (60.2 ksi), better than 82% of copper alloy grades
Limitations
- Limited formability — 12/100, worse than 87% of copper alloy grades
- Limited ductility — 8%, worse than 83% of copper alloy grades
- Low electrical conductivity — 8 % IACS, worse than 81% of copper alloy grades
- Poor heat conductor — 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 80% of copper alloy grades
C95500-TQ50 properties
Typical room-temperature values for C95500-TQ50 — 40 properties are specific to this condition; the rest are grade-level values shared by every C95500 temper. Each bar shows where the value sits among the copper alloy grades in FabDigit's library — further right is higher.
Physical3
C95500-TQ50 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 1,040°C (1,904 °F).
Mechanical13
C95500-TQ50 has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 82% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
C95500-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
C95500-TQ50 conducts electricity at 8 % IACS, worse than 81% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (76/100), better than 91% of copper alloy grades.
Sustainability4
Producing a kilogram of C95500-TQ50 takes about 50 MJ of energy and emits 3.5 kg of CO₂ — less than 90% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
C95500-TQ50's machinability is fair (35/100, better than 52% of copper alloy grades); weldability fair (50/100); formability not recommended (12/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other C95500 tempers and conditions
C95500 is also supplied in 3 other conditions. The full side-by-side table is on the C95500 overview.
- As CastDefaultDefault stock condition for propellers, pump/valve castings and bushings where strength ~700 MPa is sufficient.300 MPa yield · 192 HB
- TQ50Pick when maximum strength/hardness and improved dealloying resistance are required, e.g. highly loaded gears, shafts and valve stems.415 MPa yield · 22 HRC
Working with C95500-TQ50
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.
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.
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) | — |
C95500-TQ50 — frequently asked
What is C95500-TQ50 used for?
C95500-TQ50 is typically used for valve guides, aircraft bushings and gears. In short: premium marine propeller alloy.
What is the yield strength of C95500-TQ50?
C95500-TQ50 has a typical yield strength of 415 MPa (60.2 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 82% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C95500-TQ50 easy to machine?
Not especially — machinability is rated fair (35/100, better than 52% 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-TQ50 be welded?
With care — weldability is rated fair (50/100). 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-TQ50?
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-TQ50 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-TQ50?
C95500-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 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.
Can FabDigit make parts in C95500-TQ50?
Yes — C95500-TQ50 is available for CNC machining with instant online pricing. 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.