Copper Alloy C80100
UNS C80100 · ASTM B824, B369
C80100 (ASTM B824/B369) is a high-purity oxygen-free copper casting alloy, 99.95 % Cu and above, used when maximum electrical and thermal conductivity is required in an as-cast part.
Reference datasheet — C80100 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 M01 condition
C80100 tempers and conditions
C80100 is supplied in 6 conditions, soft to hard. M01 is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard as-cast sand casting condition — the usual stocked/produced form for electrical and vacuum parts. | 62 | 172 | 40 | 44 HB | 100 % IACS |
As chill cast | For thin-wall, fine-detail electrical parts where surface finish and dimensional accuracy matter more than strength. | 62 | 170 | 40 | 42 HB | 100 % IACS |
As investment cast | Near-net-shape complex conductive parts (waveguides, electrode holders) needing minimal machining. | 62 | 172 | 38 | 45 HB | 100 % IACS |
As centrifugally cast | Pick for rings, bushings and hollow rotationally symmetric parts; denser, less porous skin than sand cast. | 70 | 185 | 40 | 46 HB | 100 % IACS |
As plaster cast | Chill-cast in a metal mold: finer grain, sounder metal and higher strength than sand cast for repeat production runs. | 76 | 190 | 35 | 50 HB | 100 % IACS |
As continuous cast | Continuously cast bar/tube stock — soundest, most porosity-free condition and the best choice for machined conductive components and vacuum service. | 90 | 200 | 35 | 55 HB | 100 % IACS |
What is C80100?
C80100 (ASTM B824/B369) is a high-purity oxygen-free copper casting alloy, 99.95 % Cu and above, used when maximum electrical and thermal conductivity is required in an as-cast part. It provides 100 % IACS and 391 W/m·K with 172 MPa tensile strength, 62 MPa yield, 40 % elongation and 44 HB, and is supplied as sand, permanent-mould and continuous castings for electrical and vacuum-service hardware. The melt is gassy with low fluidity, machinability is about 20 % of free-cutting brass and service is limited to 200 °C; C81100 is the usual alternative when slightly lower conductivity is acceptable. C80100 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,083°C (1,981 °F). C80100 has a yield strength of 62 MPa (8.99 ksi) and a tensile strength of 172 MPa (24.9 ksi) — weaker than 99% of copper alloy grades. Elongation at break is 40% and the elastic modulus is 117 GPa (17 Msi).
What is C80100 used for?
- electrical conductor castings
- vacuum-service parts
- high-conductivity fittings
Advantages
- Conducts heat well — 391 W/m·K (225.9 BTU/hr·ft·°F), better than 98% of copper alloy grades
- High electrical conductivity — 100 % IACS, better than 96% of copper alloy grades
- Forms and bends easily — 85/100, better than 85% of copper alloy grades
- Ductile — tolerates forming and impact — 40%, better than 84% of copper alloy grades
Limitations
- Low strength — 62 MPa (8.99 ksi), worse than 99% of copper alloy grades
- Difficult to machine — 22/100, worse than 94% of copper alloy grades
C80100 properties
Typical room-temperature values for C80100-M01; bars are the position among copper alloy grades.
Physical3
C80100 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,083°C (1,981 °F).
Mechanical13
C80100 has a yield strength of 62 MPa (8.99 ksi) and a tensile strength of 172 MPa (24.9 ksi) — weaker than 99% of copper alloy grades. Elongation at break is 40% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C80100 is rated for continuous service to 200°C (392 °F). It conducts heat at 391 W/m·K (225.9 BTU/hr·ft·°F), better than 98% of copper alloy grades. Thermal expansion is 17 µm/m·K (9.44 µin/in·°F).
Electrical3
C80100 conducts electricity at 100 % IACS, better than 96% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C80100 takes about 57 MJ of energy and emits 4 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 20%.
Manufacturability8
C80100's machinability is poor (22/100, worse than 94% of copper alloy grades); weldability good (55/100); formability excellent (85/100).
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. C80100 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C80100
Is C80100 easy to machine?
Rated ~20% of free-cutting brass: gummy with long stringy chips — use sharp positive-rake tools, high speed, low feed, generous coolant; avoid built-up edge.
Can C80100 be welded?
GTAW, EBW and friction welding are all feasible; high thermal conductivity demands 400–600 °C preheat and high heat input, and hydrogen/oxygen pickup must be avoided to preserve oxygen-free purity.
Can C80100 be formed, bent or molded?
Supplied as castings — very gassy and low fluidity, so use good degassing, chill/riser-rich gating, high pouring temperature and generous machining allowance; continuous casting gives the soundest metal.
C80100 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.
| Element | Spec limit (wt %) |
|---|---|
| Agcounted as copper | — |
| Other (total impurities)Pb, Fe, Zn, Sn, Ni, P, S etc. as residuals | ≤ 0.05 |
| CuCu + Ag; oxygen-free, no deoxidizer residues | ≥ 99.95 (balance) |
What surface finishes work on C80100?
Cannot be anodized; typical finishes are machining plus bright dip/passivation, electroless or bright nickel, tin or silver plating for contacts, or clear lacquer to slow tarnishing.
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 C80100 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B824B369
How much does C80100 cost?
C80100 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.
C80100 — frequently asked
What is C80100 used for?
C80100 is typically used for electrical conductor castings, vacuum-service parts and high-conductivity fittings. In short: highest-conductivity cast copper; oxygen-free vacuum-service grade; low strength, poor machinability.
What is the yield strength of C80100?
C80100 has a typical yield strength of 62 MPa (8.99 ksi) and a tensile strength of 172 MPa (24.9 ksi) — weaker than 99% of copper alloy grades. Strength varies by condition: see the 6 listed tempers.
Is C80100 easy to machine?
Not especially — machinability is rated poor (22/100, worse than 94% of copper alloy grades). Rated ~20% of free-cutting brass: gummy with long stringy chips — use sharp positive-rake tools, high speed, low feed, generous coolant; avoid built-up edge.
Can C80100 be welded?
Yes — weldability is rated good (55/100). GTAW, EBW and friction welding are all feasible; high thermal conductivity demands 400–600 °C preheat and high heat input, and hydrogen/oxygen pickup must be avoided to preserve oxygen-free purity.
What surface finishes work on C80100?
Cannot be anodized; typical finishes are machining plus bright dip/passivation, electroless or bright nickel, tin or silver plating for contacts, or clear lacquer to slow tarnishing.
Can C80100 be formed, bent or molded?
Supplied as castings — very gassy and low fluidity, so use good degassing, chill/riser-rich gating, high pouring temperature and generous machining allowance; continuous casting gives the soundest metal.
What is the maximum service temperature of C80100?
C80100 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C80100-M01 and C80100-M07?
M01 is the default condition — standard as-cast sand casting condition — the usual stocked/produced form for electrical and vacuum parts. M07: continuously cast bar/tube stock — soundest, most porosity-free condition and the best choice for machined conductive components and vacuum service. Yield strength is 62 MPa in M01 versus 90 MPa in M07.
How much does C80100 cost?
C80100 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 B824 – Standard Specification for General Requirements for Copper Alloy Castings — ASTM International (2021)
- CDA Alloy Database – C80100 cast copper — Copper Development Association (2023)
- ASM Handbook Vol. 2 – Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 15 – Casting — ASM International (2008)
- ASTM B601 – Temper Designations for Copper and Copper Alloys — ASTM International (2019)
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.