Copper Alloy C82000
UNS C82000
C82000 (Alloy 10C) is a cast beryllium-copper with a cobalt addition that refines grain structure and balances strength against conductivity, supplied as-cast (M) or heat treated to TB00 and TF00.
Reference datasheet — C82000 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the TF00 condition
C82000 tempers and conditions
C82000 is supplied in 3 conditions, soft to hard. TF00 is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution heat treated | Interim soft condition for straightening or heavy machining before precipitation aging to TF00. | 140 | 290 | 25 | 85 HB | 18 % IACS |
Thermomechanically controlled processed | Pick for parts that will be machined then heat treated later, or where moderate strength with easier machining is acceptable. | 152 | 311 | 20 | 95 HB | 30 % IACS |
TF00Default Solution heat treated and precipitation hardened | Standard delivered condition: best combination of strength, hardness and ~45–50% IACS conductivity for electrodes and conductive structural castings. | 500 | 655 | 5 | 22 HRC | 48 % IACS |
What is C82000?
C82000 (Alloy 10C) is a cast beryllium-copper with a cobalt addition that refines grain structure and balances strength against conductivity, supplied as-cast (M) or heat treated to TB00 and TF00. Aged properties reach 500 MPa yield, 655 MPa tensile, 5 % elongation and 210 HB (22 HRC, 96 HRB) with 48 % IACS and 190 W/m·K, which suits castings that must carry current and load to about 230 °C. Elongation and formability are low, machinability is 25 and all beryllium-bearing dust requires controlled handling; C81540 or C81500 chromium copper is the alternative when higher conductivity and no beryllium exposure are required. C82000 has a density of 8.61 g/cm³ (0.311 lb/in³), lighter than 58% of copper alloy grades. It melts at 1,038°C (1,900 °F). C82000 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 89% of copper alloy grades. Elongation at break is 5% and the elastic modulus is 138 GPa (20 Msi).
What is C82000 used for?
- electrical connectors
- molds
- bearing components
- high-strength castings
Advantages
- Stiff — 138 GPa (20 Msi), better than 95% of copper alloy grades
- High strength — 500 MPa (72.5 ksi), better than 89% of copper alloy grades
- High electrical conductivity — 48 % IACS, better than 78% of copper alloy grades
- Conducts heat well — 190 W/m·K (109.8 BTU/hr·ft·°F), better than 77% of copper alloy grades
Limitations
- High embodied carbon — 6.5 kg CO₂/kg, worse than 94% of copper alloy grades
- Limited ductility — 5%, worse than 93% of copper alloy grades
- Difficult to machine — 25/100, worse than 86% of copper alloy grades
- Limited formability — 15/100, worse than 79% of copper alloy grades
C82000 properties
Typical room-temperature values for C82000-TF00; bars are the position among copper alloy grades.
Physical3
C82000 has a density of 8.61 g/cm³ (0.311 lb/in³), lighter than 58% of copper alloy grades. It melts at 1,038°C (1,900 °F).
Mechanical14
C82000 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 89% of copper alloy grades. Elongation at break is 5% and the elastic modulus is 138 GPa (20 Msi).
Thermal6
C82000 is rated for continuous service to 230°C (446 °F). It conducts heat at 190 W/m·K (109.8 BTU/hr·ft·°F), better than 77% of copper alloy grades. Thermal expansion is 17.8 µm/m·K (9.89 µin/in·°F).
Electrical3
C82000 conducts electricity at 48 % IACS, better than 78% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 58% of copper alloy grades.
Sustainability4
Producing a kilogram of C82000 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%.
Manufacturability7
C82000's machinability is poor (25/100, worse than 86% of copper alloy grades); weldability fair (40/100); formability poor (15/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C82000 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C82000
Is C82000 easy to machine?
Machine mainly in as-cast or solution-treated condition with sharp carbide tools, positive rake and flood coolant; all Be-containing swarf/dust must be wet-collected and handled under OSHA/GB beryllium controls.
Can C82000 be welded?
GTAW/resistance welding is feasible with matching or Cu-Si filler, but the HAZ over-ages and must be re-solution treated and re-aged to recover properties; extract welding fume.
Can C82000 be formed, bent or molded?
Sand, permanent-mold, centrifugal and investment casting all work well; use good gating/risering because the alloy has a short freezing range and moderate shrinkage.
C82000 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 | 0.45 – 0.8 | 0.6 |
| Cograin refiner; Ni may substitute in part per some specs | 2.4 – 2.7 | 2.55 |
| Si | ≤ 0.15 | |
| Fe | ≤ 0.2 | |
| Al | ≤ 0.15 | |
| Pb | ≤ 0.02 | |
| Cu95.0 % min including Ag | balance |
What surface finishes work on C82000?
Takes a fine polish and accepts nickel, silver or tin plating; pickle in dilute sulphuric/hydrogen-peroxide to remove the tenacious BeO scale before plating.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Equivalent designations
Standards and trade names that resolve to Copper Alloy C82000 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- Alloy 10C
How much does C82000 cost?
C82000 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C82000 — frequently asked
What is C82000 used for?
C82000 is typically used for electrical connectors, molds, bearing components and high-strength castings. In short: conductive high-strength Be-Cu casting; cobalt-refined cast structure; lower-Be, higher-conductivity casting.
What is the yield strength of C82000?
C82000 has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 89% of copper alloy grades. Strength varies by condition: see the 3 listed tempers.
Is C82000 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 86% of copper alloy grades). Machine mainly in as-cast or solution-treated condition with sharp carbide tools, positive rake and flood coolant; all Be-containing swarf/dust must be wet-collected and handled under OSHA/GB beryllium controls.
Can C82000 be welded?
With care — weldability is rated fair (40/100). GTAW/resistance welding is feasible with matching or Cu-Si filler, but the HAZ over-ages and must be re-solution treated and re-aged to recover properties; extract welding fume.
What surface finishes work on C82000?
Takes a fine polish and accepts nickel, silver or tin plating; pickle in dilute sulphuric/hydrogen-peroxide to remove the tenacious BeO scale before plating.
Can C82000 be formed, bent or molded?
Sand, permanent-mold, centrifugal and investment casting all work well; use good gating/risering because the alloy has a short freezing range and moderate shrinkage.
What is the maximum service temperature of C82000?
C82000 is rated for continuous use to about 230°C (446 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C82000-TF00 and C82000-TB00?
TF00 is the default condition — standard delivered condition: best combination of strength, hardness and ~45–50% IACS conductivity for electrodes and conductive structural castings. TB00: interim soft condition for straightening or heavy machining before precipitation aging to TF00. Yield strength is 500 MPa in TF00 versus 140 MPa in TB00.
How much does C82000 cost?
C82000 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM B770 — Copper-Beryllium Alloy Sand Castings for General Applications — ASTM International (2019)
- CDA Alloy Datasheet C82000 (10C) — Copper Development Association (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 alloy data (Alloy 10C / 20C) — Materion / NGK (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.