Copper Alloy C19100-TF00
Precip hard · default condition
UNS C19100
TF00 = solution heat treated and precipitation hardened
Pick for maximum strength plus recovered conductivity and best softening resistance in machined electrical parts.
Values for the TF00 condition
Other C19100 tempers and conditions
C19100 is listed in 8 conditions; see the grade overview at C19100.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed to 0.050 mm grain size | Fully soft annealed rod/wire for maximum ductility before heading, upsetting or deep bending. | 105 | 275 | 40 | 65 HB | 46 % IACS |
As forged and quenched | Softest, most formable supply condition — Ni-P held in solution so the part can be coined/bent and then aged to full strength. | 140 | 310 | 35 | 72 HB | 35 % IACS |
As hot forged and air cooled | Standard delivery state of forgings and extrusions where partial in-process ageing gives a useful strength/conductivity balance without extra heat treatment. | 215 | 350 | 25 | 90 HB | 42 % IACS |
Quarter hard, drawn and stress relieved | Usual screw-machine rod condition: straight, low-residual-stress bar with mid-range strength and clean chip breaking. | 340 | 415 | 16 | 120 HB | 44 % IACS |
Half hard | Cold-drawn bar/wire when higher strength is wanted without an ageing cycle. | 380 | 450 | 12 | 130 HB | 43 % IACS |
TF00DefaultThis page Solution heat treated and precipitation hardened | Pick for maximum strength plus recovered conductivity and best softening resistance in machined electrical parts. | 400 | 470 | 15 | 140 HB | 45 % IACS |
Full hard | Highest as-drawn strength and stiffness for pins, studs and spring-loaded contact stems; limited bending. | 450 | 500 | 8 | 150 HB | 42 % IACS |
TD04 and precipitation hardened | Maximum available strength: hard drawing followed by ageing, for highly loaded machined electrical hardware. | 500 | 550 | 8 | 165 HB | 44 % IACS |
What is C19100-TF00?
C19100-TF00 is C19100 in the TF00 condition — pick for maximum strength plus recovered conductivity and best softening resistance in machined electrical parts. C19100-TF00 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 470 MPa (68.2 ksi) — stronger than 80% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 121 GPa (17.5 Msi). C19100-TF00 has a density of 8.86 g/cm³ (0.32 lb/in³), heavier than 68% of copper alloy grades. It melts at 1,035°C (1,895 °F).
Advantages
- Easy to machine — 82/100, better than 90% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
- High strength — 400 MPa (58 ksi), better than 80% of copper alloy grades
- High electrical conductivity — 45 % IACS, better than 77% of copper alloy grades
- Conducts heat well — 180 W/m·K (104 BTU/hr·ft·°F), better than 75% of copper alloy grades
Limitations
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
C19100-TF00 properties
Typical room-temperature values for C19100-TF00; 12 are specific to this condition. Other listed values are C19100 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C19100-TF00 has a density of 8.86 g/cm³ (0.32 lb/in³), heavier than 68% of copper alloy grades. It melts at 1,035°C (1,895 °F).
Mechanical13
C19100-TF00 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 470 MPa (68.2 ksi) — stronger than 80% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 121 GPa (17.5 Msi).
Thermal6
C19100-TF00 is rated for continuous service to 300°C (572 °F). It conducts heat at 180 W/m·K (104 BTU/hr·ft·°F), better than 75% of copper alloy grades. Thermal expansion is 17.6 µm/m·K (9.78 µin/in·°F).
Electrical3
C19100-TF00 conducts electricity at 45 % IACS, better than 77% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C19100-TF00 takes about 57 MJ of energy and emits 3.8 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 30%.
Manufacturability7
C19100-TF00's machinability is very good (82/100, better than 90% of copper alloy grades); weldability poor (25/100); formability fair (40/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C19100-TF00
Is C19100 easy to machine?
Excellent free-cutting behaviour (~80 % of free-cutting brass): use sharp positive-rake carbide or HSS tools, high speed, light feeds and soluble-oil coolant; tellurium gives short chips without lead.
Can C19100 be welded?
Fusion welding is generally avoided — tellurium promotes hot cracking; join by silver brazing, soldering or resistance/friction welding, or use mechanical fastening.
Can C19100 be formed, bent or molded?
Hot forge/extrude at about 750–875 °C then air cool (M10) or quench (M11); cold bending and heading are best done in the quenched or annealed state, followed by 425–500 °C ageing for strength.
What surface finishes work on C19100?
Not anodisable; readily electroplated with Ni, Ag or Sn after cyanide-free acid activation, and takes a bright mechanical polish. Tellurium-bearing turnings should be segregated for recycling.
C19100 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 |
|---|---|---|
| Niwith Co counted as Ni in some registrations | 0.6 – 1.2 | 0.9 |
| Tefree-machining chip breaker | 0.35 – 0.7 | 0.5 |
| Pforms Ni-P precipitates | 0.15 – 0.35 | 0.25 |
| Pb | ≤ 0.2 | — |
| Zn | ≤ 0.5 | — |
| Fe | ≤ 0.1 | — |
| Cu98.4 % min including Ni, Te, P per CDA registration | balance | — |
C19100-TF00 — frequently asked
What is C19100-TF00 used for?
C19100-TF00 is typically used for precision machined electrical parts, connectors and switch components. In short: free-cutting conductive copper; 300 °C service temperature; age-hardenable machining grade.
What is the yield strength of C19100-TF00?
C19100-TF00 has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 470 MPa (68.2 ksi) — stronger than 80% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C19100-TF00 easy to machine?
Yes — machinability is rated very good (82/100, better than 90% of copper alloy grades). Excellent free-cutting behaviour (~80 % of free-cutting brass): use sharp positive-rake carbide or HSS tools, high speed, light feeds and soluble-oil coolant; tellurium gives short chips without lead.
Can C19100-TF00 be welded?
Not readily — weldability is rated poor (25/100). Fusion welding is generally avoided — tellurium promotes hot cracking; join by silver brazing, soldering or resistance/friction welding, or use mechanical fastening.
What surface finishes work on C19100-TF00?
Not anodisable; readily electroplated with Ni, Ag or Sn after cyanide-free acid activation, and takes a bright mechanical polish. Tellurium-bearing turnings should be segregated for recycling.
Can C19100-TF00 be formed, bent or molded?
Hot forge/extrude at about 750–875 °C then air cool (M10) or quench (M11); cold bending and heading are best done in the quenched or annealed state, followed by 425–500 °C ageing for strength.
What is the maximum service temperature of C19100-TF00?
C19100-TF00 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 C19100-TF00 and C19100-OS050?
TF00 is the default condition — pick for maximum strength plus recovered conductivity and best softening resistance in machined electrical parts. OS050: fully soft annealed rod/wire for maximum ductility before heading, upsetting or deep bending. Yield strength is 400 MPa in TF00 versus 105 MPa in OS050.
Sources
- Copper Alloy C19100 datasheet (composition, properties, temper table) — Copper Development Association (2024)
- ASTM B301 / B441 — Free-Cutting and Tellurium/Nickel-Bearing Copper Rod and Bar — ASTM International (2020)
- 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.