C10100

Q: What is C10100 Oxygen-Free Copper used for?

C10100 Oxygen-Free Electronic Copper is used for high-performance electrical applications including bus bars, coaxial cables, waveguides, vacuum tube anodes, microwave tubes, glass-to-metal seals, and high-vacuum seals. Its ultra-high purity makes it ideal where minimal outgassing is critical.

Q: What is the electrical conductivity of C10100?

C10100 has an electrical conductivity of 101% IACS (International Annealed Copper Standard), making it one of the most conductive copper alloys available. This exceptional conductivity is due to its ultra-high 99.99% copper purity.

Q: What is the difference between C10100 and C11000 copper?

C10100 (OFE) has 99.99% copper purity with virtually no oxygen (max 0.0005%), while C11000 (ETP) has 99.90% minimum copper with up to 0.04% oxygen. C10100 offers superior conductivity and is required for vacuum and electronic applications where outgassing must be minimized.

Q: Why is oxygen-free copper important for electronics?

Oxygen-free copper is critical for electronics because residual oxygen can cause outgassing in vacuum environments and degrade performance in high-frequency applications. C10100's ultra-low oxygen content (max 5 ppm) ensures stable performance in demanding electronic and vacuum applications.

Q: What forms is C10100 available in?

C10100 is a wrought alloy available as bar, rod, wire, strip, sheet, plate, and tube. It has excellent formability with an Excellent rating for both cold working and hot forming operations.

Oxygen-Free Electronic Copper (OFE)

Coppers Wrought

Ultra-high purity copper (99.99% Cu) with exceptional electrical conductivity. The standard for electronic and high-vacuum applications requiring minimal outgassing.

Purity

99.99 % Cu

Conductivity

101 % IACS

Machinability

20 / 100

Density

0.323 lb/in³

Chemical Composition

Element	Min %	Max %
Copper (Cu)	99.99	—
Oxygen (O)	—	0.0005
Lead (Pb)	—	0.0005
Iron (Fe)	—	0.0010
Silver (Ag)	—	0.0025
Phosphorus (P)	—	0.0003

Physical Properties

Density	0.323 lb/cu in
Specific Gravity	8.94
Melting Point	1981°F
Electrical Conductivity	101% IACS
Modulus of Elasticity	17,000 ksi

Mechanical Properties

Tensile Strength	32–66 ksi
Yield Strength	10–53 ksi
Elongation	4–50%
Hardness	10–62 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 Excellent

Oxyacetylene Welding Fair

Gas Shielded Arc Good

Coated Metal Arc Not
Recommended

Cold Working Excellent

Hot Forming Excellent

Typical Applications

Bus bars and electrical conductors
Coaxial cables and waveguides
Vacuum tube anodes
Microwave tubes
Glass-to-metal seals
Transistor bases
Automotive rectifiers
High-vacuum seals

Applicable Specifications

ASTM B170
ASTM B187
ASTM B152
AMS 4700
MIL-W-85

Frequently Asked Questions

What is C10100 Oxygen-Free Copper used for?

What is the electrical conductivity of C10100?

What is the difference between C10100 and C11000 copper?

Why is oxygen-free copper important for electronics?

What forms is C10100 available in?

Back to All Alloys