Copper Alloy C17510-H (Hardened)
Heat-treated state
UNS C17510 · ASTM B441 · EN CW110C
Highest strength condition of C17510 — pick for welding electrode holders, dies and high-load conductive springs.
Values for the H condition
Other C17510 tempers and conditions
C17510 is listed in 8 conditions; see the grade overview at C17510.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ADefault Solution annealed | Pick for maximum formability/machining of complex shapes before customer age-hardening. | 170 | 310 | 25 | 70 HB | 22 % IACS |
Solution heat treated and cold worked, half hard | Cold-worked stock used when a moderate strength increase after subsequent ageing is wanted. | 415 | 500 | 12 | 130 HB | 22 % IACS |
Solution heat treated and cold worked, full hard | Fully cold-drawn unaged rod/wire; ages to the highest strength (TH04). | 500 | 570 | 8 | 150 HB | 21 % IACS |
Mill hardened, half hard | Strip/plate supplied already aged by the mill for form-and-use parts where in-house heat treatment is impractical. | 550 | 690 | 15 | 13 HRC | 48 % IACS |
solution annealed then precipitation aged | Standard age-hardened condition for machined parts: high conductivity with 690–830 MPa strength and low residual stress. | 620 | 725 | 15 | 22 HRC | 50 % IACS |
TD02 and precipitation hardened | Compromise between AT and TH04: higher strength than AT with more ductility than fully hard aged. | 690 | 795 | 12 | 25 HRC | 48 % IACS |
HThis page Hardened | Highest strength condition of C17510 — pick for welding electrode holders, dies and high-load conductive springs. | 725 | 830 | 10 | 28 HRC | 50 % IACS |
TD04 and precipitation hardened | C17510 cold worked to full hard before ageing, giving the peak strength and hardness of the alloy while keeping ~45–55 % IACS conductivity, at the cost of low ductility. | 760 | 830 | 8 | 28 HRC | 48 % IACS |
What is C17510-H?
C17510-H is C17510 heat treated to H — highest strength condition of C17510 — pick for welding electrode holders, dies and high-load conductive springs. C17510-H has a yield strength of 725 MPa (105 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 97% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 131 GPa (19 Msi). C17510-H has a density of 8.75 g/cm³ (0.316 lb/in³), lighter than 51% of copper alloy grades. It melts at 1,000°C (1,832 °F). A is the default condition FabDigit quotes; H is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 95 MPa·√m (86.5 ksi·√in), better than 100% of copper alloy grades
- High strength — 725 MPa (105 ksi), better than 97% of copper alloy grades
- High service temperature — 350°C (662 °F), better than 95% of copper alloy grades
- Polishes to a fine finish — 85/100, better than 92% of copper alloy grades
- Stiff — 131 GPa (19 Msi), better than 91% of copper alloy grades
Limitations
- High embodied carbon — 4.6 kg CO₂/kg, worse than 82% of copper alloy grades
- Limited formability — 15/100, worse than 79% of copper alloy grades
- Limited ductility — 10%, worse than 76% of copper alloy grades
C17510-H properties
Typical room-temperature values for C17510-H; 15 are specific to this condition. Other listed values are C17510 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C17510-H has a density of 8.75 g/cm³ (0.316 lb/in³), lighter than 51% of copper alloy grades. It melts at 1,000°C (1,832 °F).
Mechanical15
C17510-H has a yield strength of 725 MPa (105 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 97% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 131 GPa (19 Msi).
Thermal5
C17510-H is rated for continuous service to 350°C (662 °F). It conducts heat at 240 W/m·K (138.7 BTU/hr·ft·°F), better than 81% of copper alloy grades. Thermal expansion is 17.6 µm/m·K (9.78 µin/in·°F).
Electrical3
C17510-H conducts electricity at 50 % IACS, better than 79% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 68% of copper alloy grades.
Sustainability4
Producing a kilogram of C17510-H takes about 65 MJ of energy and emits 4.6 kg of CO₂ — more than 81% of copper alloy grades. Typical recycled content is 25%.
Manufacturability8
C17510-H's machinability is fair (45/100, better than 64% of copper alloy grades); weldability good (58/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C17510-H
Is C17510 easy to machine?
Machine mainly in the aged condition with sharp carbide tools, positive rake and flood coolant; soft TB00 stock is gummy — always capture beryllium-bearing dust/mist with local exhaust and wet methods.
Can C17510 be welded?
Resistance, GTAW, EBW and laser welding are all practical (use matching or Cu-Ni filler); re-solution-treat and age welds to restore strength, and control fume exposure to Be.
Can C17510 be formed, bent or molded?
Form, bend and coin in the TB00/TD tempers, then age 3 h at ~480 °C (allow for slight growth and springback); avoid severe forming after ageing.
What surface finishes work on C17510?
Not anodizable — bright dip/passivate for a copper finish, or electroless nickel, silver or hard chrome plate for wear/contact surfaces; polishes to a mirror finish in the aged condition.
C17510 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 |
|---|---|---|
| Beberyllium — precipitation former | 0.2 – 0.6 | 0.35 |
| NiNi (Co may substitute in part per some specs) | 1.4 – 2.2 | 1.9 |
| Coincidental / partial Ni substitute | ≤ 0.3 | |
| Feimpurity limit (typical mill practice) | ≤ 0.1 | |
| CuCu + named elements ≥ 99.5 % | balance |
C17510-H — frequently asked
What is C17510-H used for?
C17510-H is typically used for resistance spot-welding electrode holders, welding electrode plunger tips, injection mould inserts and cores, high-current spring contacts, connector components and heat-sink and conductive structural parts. In short: spring-tempered copper.
What is the yield strength of C17510-H?
C17510-H has a typical yield strength of 725 MPa (105 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 97% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C17510-H easy to machine?
Reasonably — machinability is rated fair (45/100, better than 64% of copper alloy grades). Machine mainly in the aged condition with sharp carbide tools, positive rake and flood coolant; soft TB00 stock is gummy — always capture beryllium-bearing dust/mist with local exhaust and wet methods.
Can C17510-H be welded?
Yes — weldability is rated good (58/100). Resistance, GTAW, EBW and laser welding are all practical (use matching or Cu-Ni filler); re-solution-treat and age welds to restore strength, and control fume exposure to Be.
What surface finishes work on C17510-H?
Not anodizable — bright dip/passivate for a copper finish, or electroless nickel, silver or hard chrome plate for wear/contact surfaces; polishes to a mirror finish in the aged condition.
Can C17510-H be formed, bent or molded?
Form, bend and coin in the TB00/TD tempers, then age 3 h at ~480 °C (allow for slight growth and springback); avoid severe forming after ageing.
What is the maximum service temperature of C17510-H?
C17510-H is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C17510-A and C17510-TH04?
A is the default condition — pick for maximum formability/machining of complex shapes before customer age-hardening. TH04: c17510 cold worked to full hard before ageing, giving the peak strength and hardness of the alloy while keeping ~45–55 % IACS conductivity, at the cost of low ductility. Yield strength is 170 MPa in A versus 760 MPa in TH04.
Can FabDigit make parts in C17510-H?
Yes — C17510-H is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B441 — Copper-Cobalt-Beryllium and Copper-Nickel-Beryllium Rod and Bar — ASTM (2019)
- ASTM B534 — Copper-Cobalt-Beryllium / Copper-Nickel-Beryllium Plate, Sheet, Strip and Rolled Bar — ASTM (2019)
- Materion Alloy 3 (C17510) technical datasheet — Materion Brush Performance Alloys (2022)
- C17510 alloy property sheet — Copper Development Association (copper.org) (2021)
- 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.