CNC Machining Zinc
Material Description
Zinc is a metallic element renowned for its diverse technical applications due to its unique combination of properties. It boasts a silvery-gray appearance, and its atomic number is 30 on the periodic table. In its purest form, zinc is malleable and relatively soft, making it highly workable. Its high melting point at around 419 degrees Celsius (786 degrees Fahrenheit) and low boiling point at 907 degrees Celsius (1,665 degrees Fahrenheit) make it suitable for various industrial processes, particularly galvanization.
Zinc is recognized for its exceptional corrosion resistance, making it an ideal material for protecting other metals from rust and decay. It is commonly used as a coating on steel in the form of zinc-plated or galvanized products. Moreover, zinc alloys, such as zinc-aluminum, are prized for their durability, making them valuable in die-casting applications. Additionally, zinc oxide, a compound of zinc, is a crucial ingredient in the production of rubber, ceramics, paints, and various pharmaceuticals. Its remarkable combination of mechanical properties, corrosion resistance, and versatility positions zinc as a key material in a wide range of technical and industrial applications.
Grades
Zinc Die Casting Alloys (e.g., Zamak)
Finishing Options
Electroplating, Passivation
| Density | Tensile Yield Strength (MPa) | Fatigue Strength (MPa) | Hardness (Brinell) | Thermal Conductivity (W/m-K) | Coeff. of Thermal Expansion (mm/mdeg) | Electrical Resistivity (micro Ohm-cm) |
|---|---|---|---|---|---|---|
| 7100 | 300-1,000 | 30-70 | 45 - 90 | ~116 | 30.2 | 5.9 |
Design Recommendation
When designing with zinc, it is advisable to prioritize both aesthetic appeal and durability. Zinc offers a unique blend of natural patina development and corrosion resistance, making it an excellent choice for architectural applications. To maximize its potential, consider specifying zinc in combination with other materials to create contrasting textures and colors. Additionally, proper detailing and installation techniques are crucial to ensure long-term performance and to allow the material’s beautiful patina to develop gracefully over time. Regular maintenance can help preserve its visual integrity, making zinc an environmentally sustainable and visually captivating design choice.
Cost Saving Tip
Machining zinc efficiently and cost-effectively involves a balance of optimized cutting parameters, proper workspace safety, and efficient chip management. Adjust cutting speed and feed rate to minimize tool wear and achieve precise material removal. Ensuring good ventilation in the workspace is essential as heated zinc can release toxic fumes. Effective chip disposal methods, such as the use of chip conveyors or chip compactors, reduce downtime during tool changes and enhance overall productivity, contributing to cost savings in zinc machining.
