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Copper C110 (ETP)
C110 is electrolytic tough pitch copper, 99.9% copper minimum, and the standard copper for electrical and thermal parts. It conducts electricity at about 100% IACS and heat at about 388 W/m·K, more than twice 6061 aluminum. Half-hard temper runs about 42 ksi (290 MPa) tensile. It forms and stamps well but machines gummy. Use C101 or C102 where hydrogen brazing is involved.
- UNS
- C11000
- ASTM
- B152 (sheet, strip, plate) / B187 (bar, bus bar)
- EN 13599
- CW004A (Cu-ETP)
- JIS
- C1100
How does it compare?
Typical room-temperature values for C110 copper, against all 48 materials in the library.
- Tensile strength
- 290 MPa49th pct
- Yield strength
- 250 MPa35th pct
- Density
- 8.89 g/cm³100th pct
- Elongation
- 14 %32th pct
- Relative cost
- $$$$$
Bars are relative to the strongest, densest or hottest material in the SSG library. Percentile vs all 48 materials.
- Density
- 8.89 g/cm³ · 0.3212 lb/in³
- Tensile strength
- 290 MPa · 42.1 ksi
- Yield strength
- 250 MPa · 36.3 ksi
- Elongation
- 14%
- Elastic modulus
- 115 GPa · 16.7 Msi
- Hardness
- Rockwell B40 (half hard)
- Melting point
- 1065 °C · 1949 °F
- Thermal conductivity
- 388 W/m·K
- Machinability
- 60% of 1212 steel
When should you use C110 copper?
Strengths
- About 100% IACS electrical conductivity, the benchmark for conductors
- Thermal conductivity of about 388 W/m·K, more than twice 6061 aluminum
- Excellent cold formability for bending, stamping and coining
- Solders and brazes easily and resists corrosion in air and water
Watch for
- Gummy to machine: rated 20 on the copper alloy scale versus 100 for C360
- Oxygen content causes embrittlement in hydrogen brazing; use oxygen-free C101 or C102
- About 3.3× the density of aluminum at roughly twice the price per kilogram
- Tarnishes; plate with tin, nickel or silver for stable contact resistance
Typical parts
- Bus bars and electrical terminals
- Grounding straps and lugs
- Heat spreaders and cold plates
- Battery interconnects
- Induction coils and RF parts
- EMI shielding
How C110 copper is made into parts
Cost, finishes and design rules for each process in this material.
Stamping in C110 copperShort- to medium-run stampings: brackets, clips, shields, and plates cut and formed from sheet or coil in a press.
CNC machining in C110 copperCNC milling, turning, and production sawing from bar, plate, castings, and forgings, from prototype to production.
Sheet metal in C110 copperLaser-cut, punched, bent, and welded sheet metal enclosures, brackets, and chassis with no hard tooling.
What does a part in C110 copper cost?
A representative part, stamping. Raw material at about $15.00/kg is one line of it; process time and tooling usually matter more.
Bracket · Stamping
Order total $114,339
- Tooling
- $32,890
- one-time, spread over the order
- Piece price
- $3.24
- before setup + tooling
- Lead time
- 6–10 weeks
- to first production
Size
Drag a row to adjust · click to type
Width60.060.0 mm
Leg A (vertical)50.050.0 mm
Thickness2.002.00 mm
Quantity
Price per part falls as volume rises
Exact quantity2500025000 pcs
Material
Design checks pass
Open in builderBudgetary estimate for a representative part. Firm quotes come from principals after drawing review.
C110 copper questions
C110 vs C101 copper?
C101 is oxygen-free electronic copper, 99.99% pure with 0.0005% maximum oxygen. It resists hydrogen embrittlement during brazing and suits vacuum and high-end electronics. C110 has up to about 0.04% oxygen, essentially the same conductivity, and costs less.
Is copper hard to machine?
Pure copper is gummy and forms long stringy chips, rated about 20 on the copper alloy scale where C360 brass is 100. Sharp, polished, high-rake tools help. Tellurium copper C145 machines far better, about 85, with roughly 93% IACS conductivity.
What is IACS conductivity?
IACS is the International Annealed Copper Standard. 100% IACS equals 58 MS/m, the conductivity of annealed pure copper as defined in 1913. C110 runs about 100–101% IACS, 6061-T6 aluminum about 40–43%, and C360 brass about 26%.
Why plate copper bus bars?
Bare copper tarnishes and its contact resistance climbs over time. Tin plating is the common low-cost fix, silver suits high-current bolted joints, and nickel handles heat and corrosion.
Similar materials
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