Copper Alloy C72650-TF00
Precip hard
UNS C72650
TF00 = solution heat treated and precipitation hardened
Aged-only condition for parts formed or machined soft and then hardened, giving uniform properties in thick sections.
Values for the TF00 condition
Other C72650 tempers and conditions
C72650 is listed in 6 conditions; see the grade overview at C72650.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution heat treated | Choose for deep forming, heading or machining of complex shapes before spinodal aging. | 210 | 450 | 40 | 115 HB | 9 % IACS |
TF00This page Solution heat treated and precipitation hardened | Aged-only condition for parts formed or machined soft and then hardened, giving uniform properties in thick sections. | 490 | 700 | 16 | 21 HRC | 12.5 % IACS |
Solution heat treated and cold worked, full hard | Cold-drawn hard rod/strip when moderate strength plus some further forming is needed before aging. | 580 | 660 | 9 | 18 HRC | 9.5 % IACS |
TD04 and precipitation hardened | Mill-hardened balanced temper for springs, connectors and fasteners needing strength with retained ductility. | 620 | 720 | 12 | 24 HRC | 12 % IACS |
CX105Default Cold worked / spinodal-hardened rod, 105 ksi min yield | Standard stocked bar/tube condition for bushings, bearings and wear parts — best combination of strength, hardness and machinability. | 745 | 795 | 8 | 29 HRC | 12 % IACS |
Mill hardened, 110 ksi min tensile class | Highest-strength stocked strip/rod temper for high-load springs and small precision wear parts. | 760 | 830 | 6 | 31 HRC | 11.5 % IACS |
What is C72650-TF00?
C72650-TF00 is C72650 in the TF00 condition — aged-only condition for parts formed or machined soft and then hardened, giving uniform properties in thick sections. C72650-TF00 has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 88% of copper alloy grades. Elongation at break is 16% and the elastic modulus is 135 GPa (19.6 Msi). C72650-TF00 has a density of 8.85 g/cm³ (0.32 lb/in³), heavier than 66% of copper alloy grades. It melts at 1,030°C (1,886 °F). CX105 is the default condition FabDigit quotes; TF00 is available on request or by drawing note.
Advantages
- Stiff — 135 GPa (19.6 Msi), better than 93% of copper alloy grades
- Polishes to a fine finish — 85/100, better than 92% of copper alloy grades
- High strength — 490 MPa (71.1 ksi), better than 88% of copper alloy grades
- Good corrosion resistance — 72/100, better than 84% of copper alloy grades
- Easy to machine — 78/100, better than 82% of copper alloy grades
C72650-TF00 properties
Typical room-temperature values for C72650-TF00; 10 are specific to this condition. Other listed values are C72650 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C72650-TF00 has a density of 8.85 g/cm³ (0.32 lb/in³), heavier than 66% of copper alloy grades. It melts at 1,030°C (1,886 °F).
Mechanical15
C72650-TF00 has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 88% of copper alloy grades. Elongation at break is 16% and the elastic modulus is 135 GPa (19.6 Msi).
Thermal6
C72650-TF00 is rated for continuous service to 260°C (500 °F). It conducts heat at 52 W/m·K (30 BTU/hr·ft·°F), worse than 65% of copper alloy grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
C72650-TF00 conducts electricity at 12.5 % IACS, worse than 60% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 84% of copper alloy grades.
Sustainability4
Producing a kilogram of C72650-TF00 takes about 65 MJ of energy and emits 4.2 kg of CO₂ — more than 81% of copper alloy grades. Typical recycled content is 30%.
Manufacturability7
C72650-TF00's machinability is very good (78/100, better than 82% of copper alloy grades); weldability fair (35/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C72650-TF00
Is C72650 easy to machine?
Machines very well in hardened tempers with fine, non-gummy chips — use sharp carbide, positive rake, high speed and flood coolant; no lead needed for chip breaking.
Can C72650 be welded?
Fusion welding is not recommended for load-bearing joints since heat destroys the spinodal temper; if required use low-heat GTAW with Cu-Ni filler and expect local softening.
Can C72650 be formed, bent or molded?
Form, coin or bend in TB00/soft temper and then spinodally age; hardened CX/TS tempers tolerate only gentle large-radius bending.
What surface finishes work on C72650?
Polishes to low-Ra bearing surfaces; accepts electroless nickel, tin or silver plating; not anodizable, and natural surface develops a dark oxide/patina.
C72650 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 addition with Sn | 7 – 9 | 8 |
| Sn | 4 – 6 | 5 |
| Mndeoxidizer, optional | ≤ 0.3 | 0.1 |
| Feimpurity limit | ≤ 0.5 | — |
| Znimpurity limit | ≤ 0.5 | — |
| Pbimpurity limit | ≤ 0.02 | — |
| Curemainder, nominally ~87% | balance | — |
C72650-TF00 — frequently asked
What is C72650-TF00 used for?
C72650-TF00 is typically used for electrical connectors, bearings, springs and wear plates. In short: beryllium-free high-strength copper; best-machining copper-nickel; bearing and connector duty.
What is the yield strength of C72650-TF00?
C72650-TF00 has a typical yield strength of 490 MPa (71.1 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 88% of copper alloy grades. Strength varies by condition: see the 6 listed tempers.
Is C72650-TF00 easy to machine?
Yes — machinability is rated very good (78/100, better than 82% of copper alloy grades). Machines very well in hardened tempers with fine, non-gummy chips — use sharp carbide, positive rake, high speed and flood coolant; no lead needed for chip breaking.
Can C72650-TF00 be welded?
With care — weldability is rated fair (35/100). Fusion welding is not recommended for load-bearing joints since heat destroys the spinodal temper; if required use low-heat GTAW with Cu-Ni filler and expect local softening.
What surface finishes work on C72650-TF00?
Polishes to low-Ra bearing surfaces; accepts electroless nickel, tin or silver plating; not anodizable, and natural surface develops a dark oxide/patina.
Can C72650-TF00 be formed, bent or molded?
Form, coin or bend in TB00/soft temper and then spinodally age; hardened CX/TS tempers tolerate only gentle large-radius bending.
What is the maximum service temperature of C72650-TF00?
C72650-TF00 is rated for continuous use to about 260°C (500 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C72650-CX105 and C72650-TB00?
CX105 is the default condition — standard stocked bar/tube condition for bushings, bearings and wear parts — best combination of strength, hardness and machinability. TB00: choose for deep forming, heading or machining of complex shapes before spinodal aging. Yield strength is 745 MPa in CX105 versus 210 MPa in TB00.
Sources
- ToughMet 2 CX / TS alloy (C72650) technical data — Materion Performance Alloys (2023)
- Copper Alloy C72650 datasheet — Copper Development Association (copper.org) (2022)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASTM B505/B505M — Copper-Base Alloy Continuous Castings / temper designations ASTM B601 — ASTM International (2018)
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.