Copper Alloy C82800-M01
Finish state
UNS C82800 · ASTM B824
M01 = as sand cast
As-cast C82800 (Cu-2.6Be-Co-Si) with partially precipitated beryllium: strong and hard straight from the mould but brittle, and normally solution treated plus aged before service.
Values for the M01 condition
Other C82800 tempers and conditions
C82800 is listed in 4 conditions; see the grade overview at C82800.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution heat treated | Softest, most ductile condition — used for rough machining, straightening or repair welding before precipitation aging. | 240 | 520 | 12 | 155 HB | 14 % IACS |
Thermomechanically controlled processed | Raw casting condition — moderate strength, used only as a starting point before solution/aging or for low-stress parts. | 310 | 552 | 1 | 200 HB | 17 % IACS |
M01This page As sand cast | As-cast C82800 (Cu-2.6Be-Co-Si) with partially precipitated beryllium: strong and hard straight from the mould but brittle, and normally solution treated plus aged before service. | 310 | 552 | 1 | 200 HB | 16 % IACS |
TF00Default Solution heat treated and precipitation hardened | Standard supply condition for tooling: maximum hardness (~43 HRC) and >1000 MPa strength with useful thermal conductivity. | 1,000 | 1,069 | 0.5 | 43 HRC | 20 % IACS |
What is C82800-M01?
C82800-M01 is C82800 supplied in the M01 condition — as-cast C82800 (Cu-2.6Be-Co-Si) with partially precipitated beryllium: strong and hard straight from the mould but brittle, and normally solution treated plus aged before service. C82800-M01 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 552 MPa (80.1 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 1% and the elastic modulus is 131 GPa (19 Msi). C82800-M01 has a density of 8.25 g/cm³ (0.298 lb/in³), lighter than 84% of copper alloy grades. It melts at 857°C (1,575 °F). TF00 is the default condition FabDigit quotes; M01 is available on request or by drawing note.
Advantages
- Stiff — 131 GPa (19 Msi), better than 91% of copper alloy grades
Limitations
- Limited ductility — 1%, worse than 99% of copper alloy grades
- Limited formability — 5/100, worse than 98% of copper alloy grades
- Low fracture toughness — 20 MPa·√m (18.2 ksi·√in), worse than 97% of copper alloy grades
- High embodied carbon — 6 kg CO₂/kg, worse than 92% of copper alloy grades
- Difficult to machine — 25/100, worse than 86% of copper alloy grades
C82800-M01 properties
Typical room-temperature values for C82800-M01; 37 are specific to this condition. Other listed values are C82800 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C82800-M01 has a density of 8.25 g/cm³ (0.298 lb/in³), lighter than 84% of copper alloy grades. It melts at 857°C (1,575 °F).
Mechanical15
C82800-M01 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 552 MPa (80.1 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 1% and the elastic modulus is 131 GPa (19 Msi).
Thermal6
C82800-M01 is rated for continuous service to 200°C (392 °F). It conducts heat at 90 W/m·K (52 BTU/hr·ft·°F), better than 54% of copper alloy grades. Thermal expansion is 17 µm/m·K (9.44 µin/in·°F).
Electrical3
C82800-M01 conducts electricity at 16 % IACS, worse than 52% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 58% of copper alloy grades.
Sustainability4
Producing a kilogram of C82800-M01 takes about 85 MJ of energy and emits 6 kg of CO₂ — more than 92% of copper alloy grades. Typical recycled content is 30%.
Manufacturability8
C82800-M01's machinability is poor (25/100, worse than 86% of copper alloy grades); weldability fair (40/100); formability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C82800-M01
Is C82800 easy to machine?
Machinability ~20 % of AISI 1212; use sharp carbide tooling, rigid setups and flood coolant with HEPA/wet dust control — beryllium-bearing dust and fines are a health hazard.
Can C82800 be welded?
GTAW/GMAW with matching BeCu filler is possible but the weld and HAZ must be re-solutionized and re-aged; forced ventilation and fume extraction are mandatory.
Can C82800 be formed, bent or molded?
Shaped by sand, permanent-mold or investment casting only; the aged material has <1 % elongation and cannot be cold formed — do all machining before final aging where possible.
What surface finishes work on C82800?
Takes a high mold polish; commonly electroless-nickel or hard-chrome plated for corrosion/wear, and can be passivated — not anodizable.
C82800 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 | 2.5 – 2.75 | 2.6 |
| CoCo, or Co+Ni ≥ 0.35 | 0.35 – 0.65 | 0.5 |
| Si | 0.2 – 0.35 | 0.28 |
| Nicounted with Co | ≤ 0.3 | — |
| FeCo+Ni+Fe ≤ 0.70 | ≤ 0.25 | — |
| Al | ≤ 0.15 | — |
| Pb | ≤ 0.02 | — |
| Curemainder, ≈95.5 % | balance | — |
C82800-M01 — frequently asked
What is C82800-M01 used for?
C82800-M01 is typically used for high-load mold components, non-sparking safety tools and heavy-duty bearing castings. In short: highest-strength cast BeCu; maximum hardness, minimum ductility; non-sparking safety tooling.
What is the yield strength of C82800-M01?
C82800-M01 has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 552 MPa (80.1 ksi) — stronger than 64% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C82800-M01 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 86% of copper alloy grades). Machinability ~20 % of AISI 1212; use sharp carbide tooling, rigid setups and flood coolant with HEPA/wet dust control — beryllium-bearing dust and fines are a health hazard.
Can C82800-M01 be welded?
With care — weldability is rated fair (40/100). GTAW/GMAW with matching BeCu filler is possible but the weld and HAZ must be re-solutionized and re-aged; forced ventilation and fume extraction are mandatory.
What surface finishes work on C82800-M01?
Takes a high mold polish; commonly electroless-nickel or hard-chrome plated for corrosion/wear, and can be passivated — not anodizable.
Can C82800-M01 be formed, bent or molded?
Shaped by sand, permanent-mold or investment casting only; the aged material has <1 % elongation and cannot be cold formed — do all machining before final aging where possible.
What is the maximum service temperature of C82800-M01?
C82800-M01 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 C82800-TF00 and C82800-TB00?
TF00 is the default condition — standard supply condition for tooling: maximum hardness (~43 HRC) and >1000 MPa strength with useful thermal conductivity. TB00: softest, most ductile condition — used for rough machining, straightening or repair welding before precipitation aging. Yield strength is 1,000 MPa in TF00 versus 240 MPa in TB00.
Sources
- ASTM B824 — Standard Specification for General Requirements for Copper Alloy Castings — ASTM International (2022)
- ASTM B770 — Copper-Beryllium Alloy Sand Castings for General Applications — ASTM International (2019)
- CDA/UNS C82800 Alloy Datasheet — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Cast Beryllium Copper Alloys — Technical Data — Materion Brush Performance Alloys (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.