C11000

Q: What is C11000 Electrolytic Tough Pitch Copper used for?

C11000 ETP Copper is the most widely used copper for electrical and general purpose applications including electrical wire and conductors, bus bars, terminals, roofing and architectural sheet, heat exchangers, automotive radiators, magnet wire, and plumbing tube.

Q: What is the electrical conductivity of C11000?

C11000 has an electrical conductivity of 101% IACS (International Annealed Copper Standard). This high conductivity combined with its excellent formability makes it the standard material for electrical applications.

Q: What forms is C11000 available in?

C11000 is the most versatile copper alloy, available in virtually all wrought forms including sheet, strip, plate, bar, rod, wire, tube, and forgings. It has excellent formability with Excellent ratings for both cold working and hot forming.

Electrolytic Tough Pitch Copper (ETP)

Coppers Wrought

The most widely used copper for electrical applications. High conductivity (101% IACS) with excellent formability, making it the standard for electrical wire, bus bars, and architectural applications.

Purity

99.90 % Cu min

Conductivity

101 % IACS

Machinability

20 / 100

Density

0.322 lb/in³

Chemical Composition

Element	Min %	Max %
Copper (Cu)	99.90	—
Oxygen (O)	—	0.04 (typical)

Note: Cu value includes Ag. Oxygen content is controlled for optimal conductivity.

Physical Properties

Density	0.322 lb/cu in
Specific Gravity	8.91
Melting Point (Solidus)	1949°F
Melting Point (Liquidus)	1981°F
Electrical Conductivity	101% IACS

Mechanical Properties

Tensile Strength	32–66 ksi
Yield Strength	10–53 ksi
Elongation	4–55%
Hardness	10–95 Rockwell B
Machinability Rating	20

Thermal Properties

Thermal Conductivity	226 Btu/ft·hr·°F
Coefficient of Expansion	9.4 × 10⁻⁶ /°F
Specific Heat	0.092 Btu/lb·°F

Fabrication Properties

Soldering Excellent

Brazing Good

Oxyacetylene Welding Not
Recommended

Gas Shielded Arc Fair

Coated Metal Arc Not
Recommended

Cold Working Excellent

Hot Forming Excellent

Typical Applications

Electrical wire and conductors
Bus bars and terminals
Roofing and architectural sheet
Heat exchangers
Automotive radiators
Magnet wire
Plumbing tube
Printed circuit foil

Applicable Specifications

ASTM B152
ASTM B2
ASTM B3
ASTM B370
SAE J461
SAE J463

Frequently Asked Questions

What is C11000 Electrolytic Tough Pitch Copper used for?

What is the electrical conductivity of C11000?

What is the difference between C11000 and C10100 copper?

C11000 (ETP) has 99.90% minimum copper purity with typical oxygen content up to 0.04%, while C10100 (OFE) has 99.99% purity with virtually no oxygen (max 0.0005%). C11000 is more economical and suitable for most electrical applications, while C10100 is required for vacuum and electronic applications where outgassing must be minimized.

Why is C11000 called Electrolytic Tough Pitch?

C11000 is called Electrolytic Tough Pitch (ETP) because it is refined electrolytically to achieve high purity. "Tough pitch" refers to the controlled oxygen content (typically 0.02-0.04%) which gives the copper its characteristic properties. The oxygen actually helps improve the copper's electrical conductivity.

What forms is C11000 available in?

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