Copper Alloy C17000-TD01
Supply condition
UNS C17000 · EN CW100C
TD01 = solution heat treated and cold worked, quarter hard
Light cold work for parts needing extra stiffness in forming while still bendable before aging.
Values for the TD01 condition
Other C17000 tempers and conditions
C17000 is listed in 14 conditions; see the grade overview at C17000.
Compare all 14 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution heat treated | Softest supply condition — deep draw, stamp or form complex parts, then age harden. | 240 | 480 | 45 | 110 HB | 17 % IACS |
TD01This page Solution heat treated and cold worked, quarter hard | Light cold work for parts needing extra stiffness in forming while still bendable before aging. | 480 | 585 | 28 | 145 HB | 17 % IACS |
Solution heat treated and cold worked, half hard | Half-hard strip/rod for moderate forming with higher as-formed strength before age hardening. | 570 | 655 | 15 | 185 HB | 17 % IACS |
Mill hardened | Ready-to-use mill hardened strip: no customer aging, best formability of the TM series. | 620 | 760 | 16 | 22 HRC | 24 % IACS |
Solution heat treated and cold worked, full hard | Fully cold-worked temper for flat springs and contacts that receive only simple bends before aging. | 690 | 760 | 5 | 20 HRC | 17 % IACS |
mill hardened quarter hard | Mill hardened strip balancing forming of moderate bends with mid-level spring strength. | 690 | 830 | 14 | 25 HRC | 24 % IACS |
Mill hardened, half hard | Common connector-strip temper: no heat treat needed, good stress relaxation resistance. | 790 | 900 | 11 | 28 HRC | 24 % IACS |
Mill hardened, full hard | Higher-strength mill hardened strip for stamped springs with generous bend radii. | 860 | 965 | 9 | 30 HRC | 24 % IACS |
mill hardened extra hard | Extra-hard mill hardened temper for high-force contacts where only mild forming is required. | 930 | 1,035 | 7 | 33 HRC | 24 % IACS |
TF00Default Solution heat treated and precipitation hardened | Standard peak-aged bar/rod/plate condition for high-strength machined parts and molds. | 1,000 | 1,140 | 6 | 36 HRC | 23 % IACS |
Mill hardened, extra hard | Strongest mill hardened temper — near TH-level strength with no customer heat treatment. | 1,000 | 1,105 | 6 | 34 HRC | 24 % IACS |
TD01 and precipitation hardened | Formed from TD01 stock and aged — highest strength with some residual ductility. | 1,050 | 1,180 | 5 | 37 HRC | 23 % IACS |
TD02 and precipitation hardened | Aged half-hard strip for springs needing high yield strength and good fatigue life. | 1,085 | 1,220 | 4 | 38 HRC | 23 % IACS |
TD04 and precipitation hardened | Maximum-strength condition for flat springs, diaphragms and contact fingers with simple geometry. | 1,120 | 1,255 | 3 | 39 HRC | 23 % IACS |
What is C17000-TD01?
C17000-TD01 is C17000 supplied in the TD01 condition — light cold work for parts needing extra stiffness in forming while still bendable before aging. C17000-TD01 has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 585 MPa (84.8 ksi) — stronger than 88% of copper alloy grades. Elongation at break is 28% and the elastic modulus is 128 GPa (18.6 Msi). C17000-TD01 has a density of 8.41 g/cm³ (0.304 lb/in³), lighter than 72% of copper alloy grades. It melts at 866°C (1,591 °F). TF00 is the default condition FabDigit quotes; TD01 is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 70 MPa·√m (63.7 ksi·√in), better than 95% of copper alloy grades
- Polishes to a fine finish — 85/100, better than 92% of copper alloy grades
- High strength — 480 MPa (69.6 ksi), better than 88% of copper alloy grades
- Forms and bends easily — 75/100, better than 82% of copper alloy grades
Limitations
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
- High embodied carbon — 6.5 kg CO₂/kg, worse than 94% of copper alloy grades
C17000-TD01 properties
Typical room-temperature values for C17000-TD01; 22 are specific to this condition. Other listed values are C17000 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C17000-TD01 has a density of 8.41 g/cm³ (0.304 lb/in³), lighter than 72% of copper alloy grades. It melts at 866°C (1,591 °F).
Mechanical16
C17000-TD01 has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 585 MPa (84.8 ksi) — stronger than 88% of copper alloy grades. Elongation at break is 28% and the elastic modulus is 128 GPa (18.6 Msi).
Thermal6
C17000-TD01 is rated for continuous service to 150°C (302 °F). It conducts heat at 84 W/m·K (48.5 BTU/hr·ft·°F), better than 51% of copper alloy grades. Thermal expansion is 17 µm/m·K (9.44 µin/in·°F).
Electrical3
C17000-TD01 conducts electricity at 17 % IACS, better than 50% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), better than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C17000-TD01 takes about 95 MJ of energy and emits 6.5 kg of CO₂ — more than 95% of copper alloy grades. Typical recycled content is 30%.
Manufacturability8
C17000-TD01's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability good (55/100); formability very good (75/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C17000-TD01
Is C17000 easy to machine?
Machine in the aged (TF00/TH) condition with sharp carbide tools, positive rake and flood coolant; capture all chips/dust — beryllium-bearing particulate requires local exhaust and no dry grinding.
Can C17000 be welded?
Resistance, electron-beam and laser welding are preferred; GTAW is possible with matching filler but the weld zone softens and must be re-solution treated and aged; ventilate fumes.
Can C17000 be formed, bent or molded?
Form in TB00 or TD tempers before precipitation aging (typically ~315–330 °C for 2–3 h); aged material has limited bend ductility and springback is high.
What surface finishes work on C17000?
Takes a high mirror polish for mold inserts; electroless nickel, nickel/gold or silver plating is common for contacts; avoid ammonia-based cleaners to prevent stress-corrosion cracking.
C17000 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 |
|---|---|---|
| Be | 1.6 – 1.79 | 1.7 |
| Co+Niminimum combined cobalt + nickel | ≥ 0.2 | 0.3 |
| Co+Ni+Femaximum combined | ≤ 0.6 | — |
| Curemainder, including listed additions | balance | — |
C17000-TD01 — frequently asked
What is C17000-TD01 used for?
C17000-TD01 is typically used for springs, relay and switch parts and electrical connectors. In short: high-strength beryllium copper; 1000 MPa yield after aging; formable before age hardening.
What is the yield strength of C17000-TD01?
C17000-TD01 has a typical yield strength of 480 MPa (69.6 ksi) and a tensile strength of 585 MPa (84.8 ksi) — stronger than 88% of copper alloy grades. Strength varies by condition: see the 14 listed tempers.
Is C17000-TD01 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Machine in the aged (TF00/TH) condition with sharp carbide tools, positive rake and flood coolant; capture all chips/dust — beryllium-bearing particulate requires local exhaust and no dry grinding.
Can C17000-TD01 be welded?
Yes — weldability is rated good (55/100). Resistance, electron-beam and laser welding are preferred; GTAW is possible with matching filler but the weld zone softens and must be re-solution treated and aged; ventilate fumes.
What surface finishes work on C17000-TD01?
Takes a high mirror polish for mold inserts; electroless nickel, nickel/gold or silver plating is common for contacts; avoid ammonia-based cleaners to prevent stress-corrosion cracking.
Can C17000-TD01 be formed, bent or molded?
Form in TB00 or TD tempers before precipitation aging (typically ~315–330 °C for 2–3 h); aged material has limited bend ductility and springback is high.
What is the maximum service temperature of C17000-TD01?
C17000-TD01 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 C17000-TF00 and C17000-TB00?
TF00 is the default condition — standard peak-aged bar/rod/plate condition for high-strength machined parts and molds. TB00: softest supply condition — deep draw, stamp or form complex parts, then age harden. Yield strength is 1,000 MPa in TF00 versus 240 MPa in TB00.
Sources
- ASTM B194 / B196 / B197 — Beryllium copper strip, rod and wire — ASTM International (2020)
- CDA Alloy C17000 property datasheet — Copper Development Association (2023)
- Alloy 165 (C17000) technical data — Materion Brush Performance Alloys (2022)
- 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.