Copper Alloy C17465-TH04
Precip hard
UNS C17465
TH04 = tD04 and precipitation hardened
Peak-strength condition for small-diameter rod, springs and highly loaded contacts that still need ~50 % IACS.
Values for the TH04 condition
Other C17465 tempers and conditions
C17465 is listed in 6 conditions; see the grade overview at C17465.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution heat treated | Softest, most formable condition — pick when parts are deep-formed or heavily machined before age hardening. | 160 | 330 | 28 | 90 HB | 28 % IACS |
Solution heat treated and cold worked, half hard | Intermediate stiffness/strength for parts that still need some bending before aging. | 370 | 450 | 12 | 130 HB | 30 % IACS |
Solution heat treated and cold worked, full hard | Cold-drawn rod/strip used where the part will be aged after machining, or where moderate strength without heat treatment is enough. | 480 | 540 | 8 | 160 HB | 32 % IACS |
TF00Default Solution heat treated and precipitation hardened | Standard stocked rod condition: near-isotropic aged properties with high conductivity, best for machined electrode and contact parts. | 550 | 690 | 15 | 22 HRC | 50 % IACS |
TD02 and precipitation hardened | Compromise between the ductility of TF00 and the peak strength of TH04 for formed-then-aged components. | 620 | 725 | 12 | 24 HRC | 50 % IACS |
TH04This page TD04 and precipitation hardened | Peak-strength condition for small-diameter rod, springs and highly loaded contacts that still need ~50 % IACS. | 690 | 760 | 9 | 28 HRC | 52 % IACS |
What is C17465-TH04?
C17465-TH04 is C17465 in the TH04 condition — peak-strength condition for small-diameter rod, springs and highly loaded contacts that still need ~50 % IACS. C17465-TH04 has a yield strength of 690 MPa (100 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 96% of copper alloy grades. Elongation at break is 9% and the elastic modulus is 138 GPa (20 Msi). C17465-TH04 has a density of 8.83 g/cm³ (0.319 lb/in³), heavier than 65% of copper alloy grades. It melts at 1,000°C (1,832 °F). TF00 is the default condition FabDigit quotes; TH04 is available on request or by drawing note.
Advantages
- High strength — 690 MPa (100 ksi), better than 96% of copper alloy grades
- Stiff — 138 GPa (20 Msi), better than 95% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
- Conducts heat well — 220 W/m·K (127.1 BTU/hr·ft·°F), better than 80% of copper alloy grades
- High electrical conductivity — 52 % IACS, better than 80% of copper alloy grades
Limitations
- High embodied carbon — 6.5 kg CO₂/kg, worse than 94% of copper alloy grades
- Difficult to weld — 20/100, worse than 88% of copper alloy grades
- Limited ductility — 9%, worse than 79% of copper alloy grades
- Limited formability — 15/100, worse than 79% of copper alloy grades
C17465-TH04 properties
Typical room-temperature values for C17465-TH04; 18 are specific to this condition. Other listed values are C17465 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C17465-TH04 has a density of 8.83 g/cm³ (0.319 lb/in³), heavier than 65% of copper alloy grades. It melts at 1,000°C (1,832 °F).
Mechanical16
C17465-TH04 has a yield strength of 690 MPa (100 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 96% of copper alloy grades. Elongation at break is 9% and the elastic modulus is 138 GPa (20 Msi).
Thermal6
C17465-TH04 is rated for continuous service to 300°C (572 °F). It conducts heat at 220 W/m·K (127.1 BTU/hr·ft·°F), better than 80% of copper alloy grades. Thermal expansion is 17.6 µm/m·K (9.78 µin/in·°F).
Electrical3
C17465-TH04 conducts electricity at 52 % IACS, better than 80% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 58% of copper alloy grades.
Sustainability4
Producing a kilogram of C17465-TH04 takes about 100 MJ of energy and emits 6.5 kg of CO₂ — more than 96% of copper alloy grades. Typical recycled content is 30%.
Manufacturability8
C17465-TH04's machinability is good (62/100, better than 75% of copper alloy grades); weldability poor (20/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C17465-TH04
Is C17465 easy to machine?
Lead addition gives short chips and good surface finish — turn dry or with flood coolant at BeCu speeds, and capture all dust/fines under local exhaust because beryllium particulate is hazardous.
Can C17465 be welded?
Fusion welding is unreliable (lead-induced hot cracking); use resistance or electron-beam joining on unleaded transition pieces, or mechanical/brazed joints.
Can C17465 be formed, bent or molded?
Form only in TB00/TD02; aged tempers have limited bend ductility — age after forming (typically ~480 °C, 2–3 h) with allowance for slight growth.
What surface finishes work on C17465?
Not anodizable; electroless nickel, silver or tin plating are standard, and the aged alloy polishes to a bright, wear-resistant surface.
C17465 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 |
|---|---|---|
| Beprecipitation hardening element | 0.15 – 0.5 | 0.3 |
| Niforms NiBe precipitates | 1 – 1.4 | 1.2 |
| Pbfree-machining addition | 0.2 – 0.6 | 0.4 |
| CuCu + named elements 99.5 % min | balance | — |
C17465-TH04 — frequently asked
What is C17465-TH04 used for?
C17465-TH04 is typically used for connectors, precision bushings and molds. In short: free-machining beryllium copper; 50 % IACS at 550 MPa; 300 °C service ceiling.
What is the yield strength of C17465-TH04?
C17465-TH04 has a typical yield strength of 690 MPa (100 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 96% of copper alloy grades. Strength varies by condition: see the 6 listed tempers.
Is C17465-TH04 easy to machine?
Reasonably — machinability is rated good (62/100, better than 75% of copper alloy grades). Lead addition gives short chips and good surface finish — turn dry or with flood coolant at BeCu speeds, and capture all dust/fines under local exhaust because beryllium particulate is hazardous.
Can C17465-TH04 be welded?
Not readily — weldability is rated poor (20/100). Fusion welding is unreliable (lead-induced hot cracking); use resistance or electron-beam joining on unleaded transition pieces, or mechanical/brazed joints.
What surface finishes work on C17465-TH04?
Not anodizable; electroless nickel, silver or tin plating are standard, and the aged alloy polishes to a bright, wear-resistant surface.
Can C17465-TH04 be formed, bent or molded?
Form only in TB00/TD02; aged tempers have limited bend ductility — age after forming (typically ~480 °C, 2–3 h) with allowance for slight growth.
What is the maximum service temperature of C17465-TH04?
C17465-TH04 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 C17465-TF00 and C17465-TB00?
TF00 is the default condition — standard stocked rod condition: near-isotropic aged properties with high conductivity, best for machined electrode and contact parts. TB00: softest, most formable condition — pick when parts are deep-formed or heavily machined before age hardening. Yield strength is 550 MPa in TF00 versus 160 MPa in TB00.
Sources
- ASTM B441 / B534 — Cu-Ni-Be rod, bar and plate — ASTM International (2020)
- CDA Copper Alloy Database — C17460 / C17465 — Copper Development Association (2023)
- High-conductivity beryllium copper (Alloy 3 / Alloy 174) data — Materion Brush Performance Alloys (2022)
- ASM Handbook Vol. 2 — Properties of Copper and Copper 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.