Copper Alloy C72950-TX00
Supply condition
UNS C72950
TX00 = solution heat treated
Soft supersaturated condition for forming, deep drawing or machining before the customer performs spinodal ageing.
Values for the TX00 condition
Other C72950 tempers and conditions
C72950 is listed in 4 conditions; see the grade overview at C72950.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
TX00This page Solution heat treated | Soft supersaturated condition for forming, deep drawing or machining before the customer performs spinodal ageing. | 320 | 550 | 35 | 175 HB | 5 % IACS |
AT110Default Solution treated, cold worked and spinodally age hardened, 110 ksi min… | The standard stocked rod/bar condition — best balance of 760+ MPa strength, ductility and machinability for bearings and bushings. | 720 | 830 | 12 | 32 HRC | 8 % IACS |
Spinodally age hardened, 120 ksi min UTS | Higher-strength aged rod/bar for heavily loaded bushings and downhole components where a little ductility can be traded away. | 800 | 900 | 9 | 34 HRC | 9 % IACS |
Mill hardened strip/wire, 160 ksi UTS class | Highest-strength cold-rolled plus aged strip and wire for springs, contacts and connectors; very limited formability. | 1,080 | 1,150 | 3 | 40 HRC | 9 % IACS |
What is C72950-TX00?
C72950-TX00 is C72950 supplied in the TX00 condition — soft supersaturated condition for forming, deep drawing or machining before the customer performs spinodal ageing. C72950-TX00 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 68% of copper alloy grades. Elongation at break is 35% and the elastic modulus is 138 GPa (20 Msi). C72950-TX00 has a density of 8.86 g/cm³ (0.32 lb/in³), heavier than 68% of copper alloy grades. It melts at 1,040°C (1,904 °F). AT110 is the default condition FabDigit quotes; TX00 is available on request or by drawing note.
Advantages
- Stiff — 138 GPa (20 Msi), better than 95% of copper alloy grades
- Forms and bends easily — 75/100, better than 82% of copper alloy grades
- Ductile — tolerates forming and impact — 35%, better than 80% of copper alloy grades
Limitations
- Poor heat conductor — 26 W/m·K (15 BTU/hr·ft·°F), worse than 98% of copper alloy grades
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
- Low electrical conductivity — 5 % IACS, worse than 95% of copper alloy grades
- High embodied carbon — 4.8 kg CO₂/kg, worse than 84% of copper alloy grades
C72950-TX00 properties
Typical room-temperature values for C72950-TX00; 12 are specific to this condition. Other listed values are C72950 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C72950-TX00 has a density of 8.86 g/cm³ (0.32 lb/in³), heavier than 68% of copper alloy grades. It melts at 1,040°C (1,904 °F).
Mechanical16
C72950-TX00 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 68% of copper alloy grades. Elongation at break is 35% and the elastic modulus is 138 GPa (20 Msi).
Thermal6
C72950-TX00 is rated for continuous service to 150°C (302 °F). It conducts heat at 26 W/m·K (15 BTU/hr·ft·°F), worse than 98% of copper alloy grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
C72950-TX00 conducts electricity at 5 % IACS, worse than 95% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (68/100), better than 69% of copper alloy grades.
Sustainability4
Producing a kilogram of C72950-TX00 takes about 68 MJ of energy and emits 4.8 kg of CO₂ — more than 83% of copper alloy grades. Typical recycled content is 20%.
Manufacturability6
C72950-TX00's machinability is fair (45/100, better than 64% of copper alloy grades); weldability poor (30/100); formability very good (75/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C72950-TX00
Is C72950 easy to machine?
Machines cleanly with short chips in the aged AT tempers — use sharp carbide, moderate speed (~120–180 m/min) and positive rake; avoid machining the gummy TX00 solution-treated state.
Can C72950 be welded?
Fusion welding is not recommended for load-bearing joints — the HAZ over-ages and loses strength; use mechanical fastening, shrink fits or brazing with re-ageing if unavoidable.
Can C72950 be formed, bent or molded?
Form, bend or draw only in the TX00 solution-treated temper and age afterwards; aged AT/TS tempers tolerate little cold bending.
What surface finishes work on C72950?
Polishes to a bright bronze finish and accepts electroless nickel, silver or tin plating; no anodizing (copper alloy) — light oxidation gives a natural protective film.
C72950 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 |
|---|---|---|
| Nispinodal-forming solute | 14.5 – 15.5 | 15 |
| Sn | 7.5 – 8.5 | 8 |
| Fe | ≤ 0.5 | — |
| Mn | ≤ 0.3 | — |
| Zn | ≤ 0.5 | — |
| Nbgrain-refining addition, when present | ≤ 0.3 | — |
| Pb | ≤ 0.02 | — |
| Cubalance, ~76 % | balance | — |
C72950-TX00 — frequently asked
What is C72950-TX00 used for?
C72950-TX00 is typically used for heavy-duty bearings, bushings, connectors and landing gear components. In short: strongest spinodal copper-nickel; beryllium-copper replacement; high-load bearing bronze.
What is the yield strength of C72950-TX00?
C72950-TX00 has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 68% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C72950-TX00 easy to machine?
Reasonably — machinability is rated fair (45/100, better than 64% of copper alloy grades). Machines cleanly with short chips in the aged AT tempers — use sharp carbide, moderate speed (~120–180 m/min) and positive rake; avoid machining the gummy TX00 solution-treated state.
Can C72950-TX00 be welded?
Not readily — weldability is rated poor (30/100). Fusion welding is not recommended for load-bearing joints — the HAZ over-ages and loses strength; use mechanical fastening, shrink fits or brazing with re-ageing if unavoidable.
What surface finishes work on C72950-TX00?
Polishes to a bright bronze finish and accepts electroless nickel, silver or tin plating; no anodizing (copper alloy) — light oxidation gives a natural protective film.
Can C72950-TX00 be formed, bent or molded?
Form, bend or draw only in the TX00 solution-treated temper and age afterwards; aged AT/TS tempers tolerate little cold bending.
What is the maximum service temperature of C72950-TX00?
C72950-TX00 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C72950-AT110 and C72950-TX00?
AT110 is the default condition — the standard stocked rod/bar condition — best balance of 760+ MPa strength, ductility and machinability for bearings and bushings. TX00: soft supersaturated condition for forming, deep drawing or machining before the customer performs spinodal ageing. Yield strength is 720 MPa in AT110 versus 320 MPa in TX00.
Sources
- ToughMet 3 AT / TS Alloy Data Sheets — Materion Brush Performance Alloys (2022)
- ASTM B929 — Standard Specification for Wrought Copper-Nickel-Tin Spinodal Alloy Rod, Bar and Wire — ASTM International (2021)
- CDA Alloy Database — C72900/C72950 Cu-Ni-Sn spinodal alloys — 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.