GK-CuL50 is a high-purity cast copper alloy conforming to the German industrial standard DIN 17655-1981, designated as 2.0085.02. It belongs to the category of ultra-high-purity engineering copper (copper content ≥99.7%).

1. Core Advantages

• Immunity to Hydrogen Embrittlement: Oxygen content ≤300 ppm + phosphorus microalloying eliminates the risk of hydrogen brittleness.

• High Strength and Hardness

• Excellent Corrosion Resistance

• Good Heat Resistance

• High Electrical and Thermal Conductivity

2. Composition Control and Metallurgical Principles

Cu≥99.7%                Metallurgical effect：Matrix providing free electrons

O≤300 ppm             Metallurgical effect：Solid solution strengthening

P：50-150 ppm       Metallurgical effect：Deoxidation + grain boundary purification

3. Physical and Mechanical Properties

Property                                              Value                                     Industry Comparison Advantage

Density                                              8.9 g/cm³                               Comparable to pure copper

Electrical Conductivity                   50 m/(Ω·mm²)              Near oxygen-free copper (C1100), superior to beryllium copper

Thermal Conductivity                     390 W/(m·K)                  Preferred material for electronic heat dissipation

Melting Point                                     1083℃                                  Same as pure copper

Yield Strength (Rp0.2)                      86 MPa                               Higher than pure copper, lower than chromium copper

Tensile Strength (Rm)                      150 MPa                             Suitable for low-stress structural components

Elongation (A50)                                25%                                     Excellent ductility for easy forming and machining

Brinell Hardness (HBW)                   40 HB                                 Soft surface, requires scratch protection

4. Key Processing Techniques

（1）Casting:

Recommended temperature: 1200-1250℃

Suitable for sand casting, centrifugal casting, and pressure casting

Slow cooling reduces shrinkage cracks

（2）Machining:

Requires high-hardness tools (e.g., carbide tools)

Use emulsion or oil-based cutting fluids for lubrication

（3）Welding:

Suitable methods: TIG welding, resistance welding, brazing

Control heat input to avoid defects caused by high thermal conductivity

5. Typical Application Fields

• Electrical Industry: Wires and cables, electrical components

• Electronics Industry: Electronic parts, circuit boards

• Heat Exchange Sector: Radiators, heat exchangers

• Mechanical Manufacturing: Bearings, gears, molds

• Architectural Decoration: Architectural hardware, decorative materials

6. Conclusion

GK-CuL50, with its outstanding comprehensive properties, demonstrates extensive application value across electrical, electronic, heat exchange, mechanical manufacturing, and architectural decoration industries. Its high electrical and thermal conductivity, along with excellent corrosion resistance, makes it an ideal material for high-performance electrical components, heat sinks, and heat exchangers, providing a reliable material solution for various industries.

Our company can process metals into round bars, steel plates, round pipes/square pipes, and coils according to your requirements. If you have any needs, feel free to contact us. Our email address is: sale@bolaibao1.com. We look forward to your inquiries.