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Ningbo Jintian Copper (Group) Co., Ltd.
Ningbo Jintian Copper (Group) Co., Ltd.
Code
Copper

C11000 Copper

Copper

Grade Name

C11000 (UNS C11000, ASTM B152/B187, ISO CW004A)
Also known as phosphorized copper or ETP copper (Electrolytic Tough Pitch), with a minimum copper content of 99.90% and trace oxygen (≤0.06%).


Product Features

  • Exceptional electrical conductivity (~100% IACS), ideal for electrical applications.

  • High thermal conductivity (394 W/m·K), suitable for heat exchangers and cooling systems.

  • Excellent ductility and formability, enabling cold working and complex shaping.

  • Good corrosion resistance in atmospheric and aqueous environments.

  • Susceptible to "hydrogen embrittlement" in high-temperature (>370°C) reducing atmospheres.


Common Product Forms & Dimensions

Product Form

Thickness/Diameter (mm)

Width (mm)

Length (mm)

Sheet/Strip

0.08 – 6.0

8.5 – 600

Custom

Rod

3.0 – 50.0

–

1000 – 6000

Wire

0.5 – 12.0

–

Custom

Tube

OD: 5.0 – 100.0

–

Custom

Custom dimensions available based on application requirements.


Copper C11000 Chemical Composition

Element

Cu + Ag

O

Sn

Zn

Pb

Fe

Others

Content

≥99.90%

≤0.06%

≤0.002%

≤0.005%

≤0.005%

≤0.005%

≤0.10%

Impurities (e.g., Bi, Sb, S) are strictly controlled to maintain conductivity and workability39.


C11000 Copper Specification

Physical Properties

Property

Value

Density (g/cm³)

8.9

Melting Point (°C)

1083

Thermal Conductivity (W/m·K)

394

Electrical Conductivity (% IACS)

100

Coefficient of Thermal Expansion (10⁻⁶/°C)

17.0 (20–300°C)

High purity ensures minimal resistance to electrical and thermal transfer.


Mechanical Properties

Condition

Tensile Strength (MPa)

Yield Strength (MPa)

Elongation (%)

Hardness (HRB)

Annealed (Soft)

220 – 275

180

45 – 50

35 – 45

Cold Worked (Hard)

275 – 345

250 – 300

5 – 10

60 – 80

Mechanical properties vary with processing methods (e.g., annealing or cold working).


C11000 Material Core Advantages

  • Ultra-high conductivity for electrical and thermal systems.

  • Superior formability for intricate designs in electronics and machinery.

  • Cost-effective alternative to silver in conductive applications.

  • Resistance to atmospheric corrosion for long-term durability.


Product Applications

  • Electrical: Wiring, busbars, connectors, transformers.

  • Thermal Management: Heat exchangers, radiators, solar heating components.

  • Industrial: Pipes, fasteners, stamped parts.

  • Aerospace: Conductive components and heat dissipation systems.


Processing Guidelines

  • Machining: Use sharp tools with low cutting speeds and lubrication to prevent overheating.

  • Welding: Avoid high-temperature reducing environments (e.g., hydrogen-rich) to prevent hydrogen embrittlement.

  • Annealing: Perform at 500–700°C to restore ductility after cold working.

  • Forming: Suitable for cold rolling, bending, and stamping due to high ductility.


Key Application Scenarios

  • High-current electrical transmission systems (e.g., power grids).

  • Precision electronic connectors in consumer devices.

  • Corrosion-resistant plumbing and marine fittings.


FAQs

Q1: Why is C11000 prone to hydrogen embrittlement?

A: Trace oxygen reacts with hydrogen in reducing atmospheres, forming water vapor that causes micro-cracks.


Q2: How does material C11000 compare to oxygen-free copper (OFHC)?

A: C11000 has slightly lower conductivity (~100% IACS vs. 101% for OFHC) but is more cost-effective for general applications.


Q3: Can C11000 be used for welding?

A: Yes, but avoid processes involving hydrogen (e.g., gas welding). Soldering or brazing is preferred.


Standards & References

  • ASTM: B152 (sheet/strip), B187 (rod/bar).

  • ISO: CW004A (wrought copper designation).

  • GB/T: 4423-1992 (Chinese standard for processing).


Note: Properties may vary slightly based on manufacturing processes. Always verify specifications with certified test reports.


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