Copper Alloy C82200-M
Heat-treated state
UNS C82200 · ASTM B824
M = thermomechanically controlled processed
Pick for low-stress, high-ductility conductive castings or when the part will be heat treated after machining.
Values for the M condition
Other C82200 tempers and conditions
C82200 is listed in 3 conditions; see the grade overview at C82200.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution heat treated | Intermediate soft condition (≈790–815 °C solution + water quench) for heavy machining or straightening before ageing. | 125 | 275 | 30 | 55 HB | 20 % IACS |
MThis page Thermomechanically controlled processed | Pick for low-stress, high-ductility conductive castings or when the part will be heat treated after machining. | 160 | 345 | 20 | 80 HB | 25 % IACS |
TF00Default Solution heat treated and precipitation hardened | Standard supply condition: full age-hardened strength with ~45 % IACS conductivity for current-carrying, load-bearing castings. | 415 | 620 | 5 | 195 HB | 45 % IACS |
What is C82200-M?
C82200-M is C82200 heat treated to M — pick for low-stress, high-ductility conductive castings or when the part will be heat treated after machining. C82200-M has a yield strength of 160 MPa (23.2 ksi) and a tensile strength of 345 MPa (50 ksi) — weaker than 65% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 130 GPa (18.9 Msi). C82200-M has a density of 8.75 g/cm³ (0.316 lb/in³), lighter than 51% of copper alloy grades. It melts at 985°C (1,805 °F). TF00 is the default condition FabDigit quotes; M is available on request or by drawing note.
Advantages
- Stiff — 130 GPa (18.9 Msi), better than 89% of copper alloy grades
Limitations
- Limited formability — 15/100, worse than 79% of copper alloy grades
- High embodied carbon — 4.5 kg CO₂/kg, worse than 79% of copper alloy grades
C82200-M properties
Typical room-temperature values for C82200-M; 37 are specific to this condition. Other listed values are C82200 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C82200-M has a density of 8.75 g/cm³ (0.316 lb/in³), lighter than 51% of copper alloy grades. It melts at 985°C (1,805 °F).
Mechanical13
C82200-M has a yield strength of 160 MPa (23.2 ksi) and a tensile strength of 345 MPa (50 ksi) — weaker than 65% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 130 GPa (18.9 Msi).
Thermal6
C82200-M is rated for continuous service to 180°C (356 °F). It conducts heat at 105 W/m·K (60.7 BTU/hr·ft·°F), better than 56% of copper alloy grades. Thermal expansion is 17.8 µm/m·K (9.89 µin/in·°F).
Electrical3
C82200-M conducts electricity at 25 % IACS, better than 59% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 58% of copper alloy grades.
Sustainability4
Producing a kilogram of C82200-M takes about 70 MJ of energy and emits 4.5 kg of CO₂ — more than 84% of copper alloy grades. Typical recycled content is 30%.
Manufacturability7
C82200-M's machinability is fair (45/100, better than 64% of copper alloy grades); weldability good (55/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C82200-M
Is C82200 easy to machine?
Machines like a tough bronze at ~20 % of AISI 1212; rough in the solution-treated state, finish after ageing, and use wet cutting plus local exhaust because beryllium-bearing dust and fume are toxic.
Can C82200 be welded?
GTAW/GMAW with matching Cu-Be filler works well; preheat lightly, keep heat input low, and re-solution treat plus re-age welded areas to restore properties — avoid oxyfuel welding.
Can C82200 be formed, bent or molded?
Sand, permanent-mould and centrifugal casting all rate well; feed heavy sections generously because the alloy is moderately long-freezing-range, and hold quench delay short after solution treatment.
What surface finishes work on C82200?
Takes a bright mechanical polish and accepts nickel, silver or tin electroplating after a proper oxide-removal etch; not an anodizing alloy.
C82200 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 hardener | 0.35 – 0.8 | 0.55 |
| NiNi + Co may be counted together | 1 – 2 | 1.5 |
| Feimpurity limit | ≤ 0.2 | — |
| Siimpurity limit | ≤ 0.15 | — |
| Alimpurity limit | ≤ 0.15 | — |
| Curemainder, Cu + named elements ≥ 99.5 | ≥ 95 (balance) | — |
C82200-M — frequently asked
What is C82200-M used for?
C82200-M is typically used for welding equipment components, resistance welding electrode holders and high-strength conductive castings. In short: age-hardening conductive casting; 45 % IACS at 195 HB; 300 °C service capability.
What is the yield strength of C82200-M?
C82200-M has a typical yield strength of 160 MPa (23.2 ksi) and a tensile strength of 345 MPa (50 ksi) — weaker than 65% of copper alloy grades. Strength varies by condition: see the 3 listed tempers.
Is C82200-M easy to machine?
Reasonably — machinability is rated fair (45/100, better than 64% of copper alloy grades). Machines like a tough bronze at ~20 % of AISI 1212; rough in the solution-treated state, finish after ageing, and use wet cutting plus local exhaust because beryllium-bearing dust and fume are toxic.
Can C82200-M be welded?
Yes — weldability is rated good (55/100). GTAW/GMAW with matching Cu-Be filler works well; preheat lightly, keep heat input low, and re-solution treat plus re-age welded areas to restore properties — avoid oxyfuel welding.
What surface finishes work on C82200-M?
Takes a bright mechanical polish and accepts nickel, silver or tin electroplating after a proper oxide-removal etch; not an anodizing alloy.
Can C82200-M be formed, bent or molded?
Sand, permanent-mould and centrifugal casting all rate well; feed heavy sections generously because the alloy is moderately long-freezing-range, and hold quench delay short after solution treatment.
What is the maximum service temperature of C82200-M?
C82200-M is rated for continuous use to about 180°C (356 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C82200-TF00 and C82200-TB00?
TF00 is the default condition — standard supply condition: full age-hardened strength with ~45 % IACS conductivity for current-carrying, load-bearing castings. TB00: intermediate soft condition (≈790–815 °C solution + water quench) for heavy machining or straightening before ageing. Yield strength is 415 MPa in TF00 versus 125 MPa in TB00.
Sources
- ASTM B770 — Copper-Beryllium Alloy Sand Castings for General Applications — ASTM International (2019)
- ASTM B824 — General Requirements for Copper Alloy Castings — ASTM International (2021)
- CDA Alloy Database — C82200 cast copper-beryllium — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Cast copper beryllium alloys — foundry and heat treatment guide — 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.