Copper Alloy C10200
UNS C10200 · ASTM B170 · EN Cu-OF, CW008A · JIS C1020 · GB TU2
C10200 is oxygen-free wrought copper (99.95 % Cu minimum; CW008A, Cu-OF, TU2) with no oxide phase, so it does not embrittle in reducing or hydrogen atmospheres.
Values for the O condition
C10200 tempers and conditions
C10200 is supplied in 14 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
Compare all 14 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Most stocked condition: maximum ductility and conductivity for deep drawing, bending, gaskets, vacuum parts and busbar forming. | 69 | 221 | 45 | 45 HB | 101 % IACS |
Hot rolled and annealed | Fully softened hot-rolled/hot-worked oxygen-free copper plate, bar and shapes with maximum ductility and ~101% IACS conductivity. | 69 | 221 | 45 | 45 HB | 101 % IACS |
As hot rolled | Mill condition for thick plate, billet and heavy busbar that will be machined or annealed afterwards. | 75 | 220 | 45 | 45 HB | 101 % IACS |
Annealed to 0.025 mm grain size | Fine-grain anneal for strip that must be formed and then keep a smooth (non-orange-peel) surface. | 90 | 235 | 40 | 50 HB | 101 % IACS |
Eighth hard | Slight stiffening over annealed while keeping near-full formability; common for busbar and lead frames that still need bending. | 170 | 250 | 30 | 60 HB | 100.5 % IACS |
Light drawn | Light-drawn OF tube: stiffer than annealed but still bendable, used for vacuum and cryogenic lines. | 195 | 255 | 25 | 70 HB | 100 % IACS |
Quarter hard | Balanced strength/bendability for stamped contacts and shielding that see moderate forming. | 205 | 262 | 25 | 70 HB | 100 % IACS |
Half hard | Standard semi-rigid temper for bar, rod and strip needing handling stiffness with 90° bendability. | 250 | 290 | 14 | 80 HB | 100 % IACS |
Three-quarter hard | Intermediate step to full hard when higher yield is needed but full-hard brittleness in bending is unacceptable. | 275 | 315 | 10 | 88 HB | 99.5 % IACS |
Hard drawn | Hard-drawn seamless tube and rod for pressure lines, waveguides and machined vacuum hardware. | 275 | 315 | 15 | 90 HB | 99 % IACS |
Full hard | Highest routinely stocked strength for flat springs, hard-drawn wire/rod and machined parts needing chip control. | 310 | 345 | 6 | 95 HB | 99 % IACS |
Extra hard | Thin strip/wire needing extra stiffness where forming is limited to gentle radii. | 340 | 365 | 4 | 100 HB | 98.5 % IACS |
Spring hard | Spring-temper strip/wire for contacts, gaskets and RF fingers where elastic limit matters more than ductility. | 350 | 380 | 4 | 105 HB | 98 % IACS |
Extra spring hard | Maximum cold-worked strength available in thin OF copper foil/strip; essentially flat-form only. | 365 | 393 | 3 | 110 HB | 98 % IACS |
What is C10200?
C10200 is oxygen-free wrought copper (99.95 % Cu minimum; CW008A, Cu-OF, TU2) with no oxide phase, so it does not embrittle in reducing or hydrogen atmospheres. It carries 101 % IACS electrical conductivity and 391 W/m·K thermal conductivity and is stocked as bar, plate, sheet, strip and tube in tempers from O through H10, with 45 % elongation and a formability score of 98 when annealed. Strength is low (69 MPa yield, 221 MPa tensile, 45 HB), machining is gummy, and service is limited to about 250 °C; C11000 ETP copper is cheaper where hydrogen brazing is not involved. C10200 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). C10200 has a yield strength of 69 MPa (10 ksi) and a tensile strength of 221 MPa (32.1 ksi) — weaker than 96% of copper alloy grades. Elongation at break is 45% and the elastic modulus is 117 GPa (17 Msi).
What is C10200 used for?
- Electrical conductors and bus bars
- RF cavities and waveguides
- Vacuum chamber components and seals
- Hydrogen-brazed heat exchangers
- Heat sinks and cold plates
- Transformer and switchgear terminals
- Deep-drawn and spun copper shells
Advantages
- Forms and bends easily — 98/100, better than 99% of copper alloy grades
- Conducts heat well — 391 W/m·K (225.9 BTU/hr·ft·°F), better than 98% of copper alloy grades
- High electrical conductivity — 101 % IACS, better than 98% of copper alloy grades
- Ductile — tolerates forming and impact — 45%, better than 91% of copper alloy grades
- Readily welded — 65/100, better than 80% of copper alloy grades
Limitations
- Low strength — 69 MPa (10 ksi), worse than 96% of copper alloy grades
- Difficult to machine — 22/100, worse than 94% of copper alloy grades
C10200 properties
Typical room-temperature values for C10200-O; bars are the position among copper alloy grades.
Physical3
C10200 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).
Mechanical12
C10200 has a yield strength of 69 MPa (10 ksi) and a tensile strength of 221 MPa (32.1 ksi) — weaker than 96% of copper alloy grades. Elongation at break is 45% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C10200 is rated for continuous service to 250°C (482 °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 16.9 µm/m·K (9.39 µin/in·°F).
Electrical3
C10200 conducts electricity at 101 % IACS, better than 98% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), better than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C10200 takes about 57 MJ of energy and emits 3.8 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 20%.
Manufacturability8
C10200's machinability is poor (22/100, worse than 94% of copper alloy grades); weldability good (65/100); formability excellent (98/100).
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. C10200 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C10200
Is C10200 easy to machine?
Gummy and stringy — use sharp positive-rake tools, high speed, generous soluble-oil coolant and H02/H04 temper (never annealed) for acceptable chip break; rating ~20 % of free-cutting brass.
Can C10200 be welded?
GTAW/GMAW with ERCu filler, helium or Ar-He shielding and 200–400 °C preheat on thick sections to overcome the heat sink; no hydrogen embrittlement risk, so brazing and hydrogen-furnace brazing are excellent.
Can C10200 be formed, bent or molded?
Outstanding cold formability in O temper (deep draw, coin, spin, roll-form); interanneal at 375–650 °C when total reduction exceeds ~60 %.
Manufacturability
The process limits FabDigit's quote engine applies to C10200. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Fair22 / 100 |
|---|---|
| ISO material group | N.5 |
| Cutting speed (rough / finish) | 180 / 220 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 6× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Excellent98 / 100 |
|---|---|
| Weldability | Good65 / 100 |
| Bendable | Yes |
C10200 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 |
|---|---|---|
| O10 ppm max — defines the 'oxygen-free' grade | ≤ 0 | 5×10⁻⁴ |
| Pnot deliberately added (deoxidiser-free to preserve conductivity) | ≤ 3×10⁻⁴ | |
| Agcounted as copper | ≈ 0 | 0 |
| Total other impuritiesBi, Pb, S, Se, Te, Sb, As, Fe, Ni, Sn, Zn each held to ppm levels per ASTM B170 | ≤ 0.05 | |
| CuCu + Ag, oxygen-free; ASTM B170 Grade 2 / UNS C10200 | ≥ 99.95 (balance) |
What surface finishes work on C10200?
Not anodisable — bright-dip/pickle then electroplate Ni, Ag, Sn or Au, or apply benzotriazole passivation/clear lacquer; polishes to a high mirror finish but tarnishes quickly if unprotected.
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).
Passivation
Plating
Organic Coating
Equivalent designations
Standards and trade names that resolve to Copper Alloy C10200 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
How much does C10200 cost?
C10200 is a high-cost copper alloy ($$$$), pricier than about 98% 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.
C10200 — frequently asked
What is C10200 used for?
C10200 is typically used for electrical conductors and bus bars, RF cavities and waveguides, vacuum chamber components and seals, hydrogen-brazed heat exchangers, heat sinks and cold plates and transformer and switchgear terminals. In short: oxygen-free pure copper.
What is the yield strength of C10200?
C10200 has a typical yield strength of 69 MPa (10 ksi) and a tensile strength of 221 MPa (32.1 ksi) — weaker than 96% of copper alloy grades. Strength varies by condition: see the 14 listed tempers.
Is C10200 easy to machine?
Not especially — machinability is rated poor (22/100, worse than 94% of copper alloy grades). Gummy and stringy — use sharp positive-rake tools, high speed, generous soluble-oil coolant and H02/H04 temper (never annealed) for acceptable chip break; rating ~20 % of free-cutting brass.
Can C10200 be welded?
Yes — weldability is rated good (65/100). GTAW/GMAW with ERCu filler, helium or Ar-He shielding and 200–400 °C preheat on thick sections to overcome the heat sink; no hydrogen embrittlement risk, so brazing and hydrogen-furnace brazing are excellent.
What surface finishes work on C10200?
Not anodisable — bright-dip/pickle then electroplate Ni, Ag, Sn or Au, or apply benzotriazole passivation/clear lacquer; polishes to a high mirror finish but tarnishes quickly if unprotected.
Can C10200 be formed, bent or molded?
Outstanding cold formability in O temper (deep draw, coin, spin, roll-form); interanneal at 375–650 °C when total reduction exceeds ~60 %.
What is the maximum service temperature of C10200?
C10200 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C10200-O and C10200-H10?
O is the default condition — most stocked condition: maximum ductility and conductivity for deep drawing, bending, gaskets, vacuum parts and busbar forming. H10: maximum cold-worked strength available in thin OF copper foil/strip; essentially flat-form only. Yield strength is 69 MPa in O versus 365 MPa in H10.
How much does C10200 cost?
C10200 is a high-cost copper alloy ($$$$), pricier than about 98% 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.
Can FabDigit make parts in C10200?
Yes — C10200 is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B170 — Oxygen-Free Electrolytic Copper Refinery Shapes — ASTM International (2019)
- ASTM B152/B152M — Copper Sheet, Strip, Plate and Rolled Bar — ASTM International (2019)
- ASTM B187 — Copper Bus Bar, Rod and Shapes — ASTM International (2020)
- EN 13601 / EN 1976 — Cu-OF (CW008A) — CEN (2013)
- CDA/copper.org alloy datasheet C10200 — Copper Development Association (2024)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
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.