TU2 Copper

Designation and Standards

• Standard Designation: TU2 (China GB/T 5231-2012)

• International Equivalent Grades:

• ASTM B152: C10100 (Oxygen-Free Copper)

• EN 13601: Cu-OFE (Oxygen-Free Electrolytic Copper)

  
  

Product Features

• Ultra-High Purity: Copper content ≥ 99.95%, with minimal impurities and oxygen content ≤ 0.002%.

• Excellent Conductivity and Thermal Conductivity: Conductivity ≥ 101% IACS, Thermal Conductivity ≥ 397 W/(m·K).

• No Hydrogen Embrittlement Risk: Low oxygen content prevents embrittlement in high-temperature reducing environments.

• Superior Workability: Excellent ductility, suitable for stamping, drawing, and welding processes.

  
  

Common Product Forms and Dimensions

Chemical Composition

Physical Properties

Mechanical Properties (Annealed State)

Core Advantages

• Purity Assurance: Ultra-low impurity content ensures stable electrochemical performance.

• High-Temperature Stability: Suitable for vacuum or noble gas environments (e.g., semiconductor manufacturing).

• Corrosion Resistance: Excellent oxidation resistance in dry, sulfur-free environments.

• Processing Flexibility: Supports precision etching, laser cutting, and other complex processes.

  
  

Product Applications

Processing Notes

• Cold Working: Intermediate annealing (650-800°C under noble gases) is required if deformation exceeds 30%.

• Welding: Preferably use TIG welding (argon purity ≥ 99.99%) to avoid porosity and oxidation.

• Cutting: Recommend low-speed, high-feed cutting with sulfurized cutting oil to reduce tool wear.

• Surface Treatment:

  Short-term Anti-Oxidation: Apply Benzotriazole (BTA) corrosion inhibitor.

  Long-term Protection: Nickel electro plating (thickness ≥ 5μm) or hot dip tinning.

Key Application Scenarios

• High-Precision Heat Sinks: 5G base station chip heat sinks, IGBT module substrates.

• Vacuum Equipment Components: Coating machine targets, particle accelerator conductive cavities.

• Superconducting Material Carriers: Low-temperature superconducting cable support frames (used in liquid nitrogen environments).

Frequently Asked Questions

Q1: Can TU2 copper replace T2 copper?

TU2 is required for high conductivity/thermal conductivity or vacuum environments, while T2 can be used for cost savings in conventional applications.

Q2: How to check if oxygen content is compliant?

Oxygen content is professionally tested using Noble Gas Fusion-Infrared Absorption Method (GB/T 5121.7).

Q3: How to deal with surface oxidation after long-term storage?

Light oxidation can be removed with 5% citric acid solution; severe oxidation requires mechanical polishing and passivation treatment.

Standards Reference

Additional Notes

• Environmental Compliance: Compliant with RoHS 2.0 (Heavy Metal Limits) and REACH SVHC regulations.

• Customization Services: Supports non-standard dimensions, pre-coating (tin/silver/nickel), and other special requirements.

For additional performance curves or application examples, please contact technical support!