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)
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.
Product Form | Dimension Range | Surface Condition |
Strip | Thickness: 5-50mm; Width: 20-300mm; Length: ≤6m | Smooth/1/2Hard |
Plate | Thickness: 0.5-50mm; Width: 100-2000mm | Rolled/Polished |
Tube | Outer Diameter: 3-200mm; Wall Thickness: 0.5-15mm | Y/M (Annealed) |
Wire | Diameter: 0.1-10mm; Coil Weight: 50-500kg | Bright/Tin-Plated |
Element | Cu | O | P | S | Total Impurities |
Content | ≥99.95% | ≤0.002% | ≤0.001% | ≤0.002% | ≤0.05% |
Property | Value | Test Standard |
Density | 8.96 g/cm³ | GB/T 3850 |
Melting Point | 1083°C | GB/T 232 |
Conductivity (20°C) | 101-103% IACS | GB/T 3048.2 |
Thermal Conductivity (20°C) | 397-401 W/(m·K) | ASTM E1461 |
Thermal Expansion Coefficient | 16.5×10⁻⁶/°C (20-100°C) | GB/T 4339 |
Property | Value | Test Standard |
Tensile Strength | 200-250 MPa | GB/T 228.1 |
Yield Strength | 60-80 MPa | GB/T 228.1 |
Elongation (δ) | ≥35% | GB/T 228.1 |
Hardness (HV) | 40-60 | GB/T 4340.1 |
Elastic Modulus | 110-130 GPa | GB/T 22315 |
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.
Industry | Typical Applications | Key Requirements |
Electronics | Integrated circuit lead frames, high-frequency transformer windings | High conductivity, low signal loss |
Energy Equipment | Solar cell conductors, nuclear power plant cooling tubes | Radiation resistance, long-term thermal stability |
Automotive | EV cooling plates, high-voltage connectors | High thermal conductivity, vibration fatigue resistance |
Aerospace | Rocket engine liners, thermal management systems | High-temperature oxidation resistance, lightweight design |
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.
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).
TU2 is required for high conductivity/thermal conductivity or vacuum environments, while T2 can be used for cost savings in conventional applications.
Oxygen content is professionally tested using Noble Gas Fusion-Infrared Absorption Method (GB/T 5121.7).
Light oxidation can be removed with 5% citric acid solution; severe oxidation requires mechanical polishing and passivation treatment.
Standard Type | Standard Number | Scope |
Chinese Standard | GB/T 5231-2012 | Chemical composition, grade definition |
American Standard | ASTM B152-20 | Dimensions and tolerances for oxygen-free copper products |
European Standard | EN 13601:2013 | Conductivity and mechanical properties testing methods |
International Standard | ISO 1337:2020 | Hydrogen embrittlement susceptibility evaluation for high-purity copper |
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!
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No.1 Chengxi West Road, Cicheng, Ningbo, China