Copper Alloy C82400-TB00
Heat-treated state
UNS C82400
TB00 = solution heat treated
Intermediate condition supplied when the customer will straighten/machine soft and then precipitation-age to full hardness.
Values for the TB00 condition
Other C82400 tempers and conditions
C82400 is listed in 4 conditions; see the grade overview at C82400.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Thermomechanically controlled processed | As-cast 1.65 %Be–Co beryllium copper casting: moderate strength and good ductility before solution/age hardening, excellent castability and high thermal conductivity for moulds and bearings. | 240 | 500 | 20 | 105 HB | 16 % IACS |
TB00This page Solution heat treated | Intermediate condition supplied when the customer will straighten/machine soft and then precipitation-age to full hardness. | 240 | 480 | 30 | 130 HB | 17 % IACS |
As cast | Choose for tough, moderately strong castings where dimensional stability after aging is not needed or where the part will be machined then aged later. | 275 | 517 | 20 | 165 HB | 17 % IACS |
TF00Default Solution heat treated and precipitation hardened | Standard supply condition for mold inserts, cooling cores and heavy-duty bearings needing 35–41 HRC with ~20% IACS conductivity. | 895 | 1,035 | 1.5 | 38 HRC | 22 % IACS |
What is C82400-TB00?
C82400-TB00 is C82400 heat treated to TB00 — intermediate condition supplied when the customer will straighten/machine soft and then precipitation-age to full hardness. C82400-TB00 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 480 MPa (69.6 ksi) — stronger than 52% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 128 GPa (18.6 Msi). C82400-TB00 has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 80% of copper alloy grades. It melts at 866°C (1,591 °F). TF00 is the default condition FabDigit quotes; TB00 is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 85/100, better than 92% of copper alloy grades
- Ductile — tolerates forming and impact — 30%, better than 75% of copper alloy grades
Limitations
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
- High embodied carbon — 6 kg CO₂/kg, worse than 92% of copper alloy grades
C82400-TB00 properties
Typical room-temperature values for C82400-TB00; 12 are specific to this condition. Other listed values are C82400 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C82400-TB00 has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 80% of copper alloy grades. It melts at 866°C (1,591 °F).
Mechanical14
C82400-TB00 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 480 MPa (69.6 ksi) — stronger than 52% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 128 GPa (18.6 Msi).
Thermal6
C82400-TB00 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
C82400-TB00 conducts electricity at 17 % IACS, better than 50% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 68% of copper alloy grades.
Sustainability4
Producing a kilogram of C82400-TB00 takes about 90 MJ of energy and emits 6 kg of CO₂ — more than 93% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
C82400-TB00's machinability is poor (28/100, worse than 78% of copper alloy grades); weldability fair (45/100); formability fair (40/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C82400-TB00
Is C82400 easy to machine?
Machine with sharp carbide tooling, positive rake, rigid setups and flood coolant; capture all dust/chips under local exhaust because beryllium-containing particulate is a health hazard — rough soft (C/TB00) and finish after aging where accuracy allows.
Can C82400 be welded?
GTAW/PAW with matching Be-Cu filler works with preheat control and inert shielding, but the heat-affected zone loses aged strength, so re-solution-treat and re-age or accept local softening; fume extraction is mandatory.
Can C82400 be formed, bent or molded?
A casting alloy — pour in sand, permanent mold or centrifugal molds with good gating/feeding for the hot-short mushy range; not intended for cold forming after aging.
What surface finishes work on C82400?
Polishes to a high mold finish and takes electroless nickel, bright nickel or hard chrome plating; no anodizing — passivate or lacquer for tarnish control.
C82400 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 – 1.85 | 1.7 |
| Cograin refiner; Co+Ni may be reported together | 0.2 – 0.65 | 0.35 |
| Fe | ≤ 0.2 | — |
| Al | ≤ 0.15 | — |
| Si | ≤ 0.15 | — |
| CuCu + named elements ≥ 99.5 %; Cu remainder (~97.6–98.0 %) | balance | — |
C82400-TB00 — frequently asked
What is C82400-TB00 used for?
C82400-TB00 is typically used for plastic injection molds, bearings, cams and wear parts. In short: high-hardness cast Be-Cu; mould-grade wear resistance; strength over conductivity.
What is the yield strength of C82400-TB00?
C82400-TB00 has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 480 MPa (69.6 ksi) — stronger than 52% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C82400-TB00 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 78% of copper alloy grades). Machine with sharp carbide tooling, positive rake, rigid setups and flood coolant; capture all dust/chips under local exhaust because beryllium-containing particulate is a health hazard — rough soft (C/TB00) and finish after aging where accuracy allows.
Can C82400-TB00 be welded?
With care — weldability is rated fair (45/100). GTAW/PAW with matching Be-Cu filler works with preheat control and inert shielding, but the heat-affected zone loses aged strength, so re-solution-treat and re-age or accept local softening; fume extraction is mandatory.
What surface finishes work on C82400-TB00?
Polishes to a high mold finish and takes electroless nickel, bright nickel or hard chrome plating; no anodizing — passivate or lacquer for tarnish control.
Can C82400-TB00 be formed, bent or molded?
A casting alloy — pour in sand, permanent mold or centrifugal molds with good gating/feeding for the hot-short mushy range; not intended for cold forming after aging.
What is the maximum service temperature of C82400-TB00?
C82400-TB00 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 C82400-TF00 and C82400-M?
TF00 is the default condition — standard supply condition for mold inserts, cooling cores and heavy-duty bearings needing 35–41 HRC with ~20% IACS conductivity. M: as-cast 1.65 %Be–Co beryllium copper casting: moderate strength and good ductility before solution/age hardening, excellent castability and high thermal conductivity for moulds and bearings. Yield strength is 895 MPa in TF00 versus 240 MPa in M.
Sources
- ASTM B770 — Copper-Beryllium Alloy Sand Castings for General Applications — ASTM International (2019)
- CDA Alloy Datasheet C82400 (Alloy 165C) — Copper Development Association / copper.org (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- Cast beryllium copper mold alloys (165C / 20C / 275C) technical data — Materion / NGK (2022)
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.