Zinc is a preferred choice for CNC machining due to its durability, low friction coefficient, impressive malleability, and elegant finish. 3ERP provides a comprehensive range of zinc CNC machining services, utilizing advanced technology and state-of-the-art equipment for unrivaled precision and quality. Our proficient machinists specialize in crafting complex parts, from intricate molds to highly customized components. Zamak 3, Zamak 5, and ZA-8 alloys are commonly used in our CNC machining processes. Each alloy has its unique properties that make it suitable for specific applications.
Zamak 3, sometimes referred to as Zinc Alloy 3, is the most common zinc alloy in North America due to its excellent balance of hardness, ductility, and strength. It’s an ideal choice for numerous CNC machining applications.
Tensile Strength: 285 MPa, 41,300 psi
Yield Strength: 250 MPa, 36,300 psi
Shear Modulus: 40 GPa
Elongation at Break: 10%
Hardness (Brinell): 82
Density: 6.6 g/cm³, 0.238 lb/in³
Maximum Temp: 380 – 395°C, 716 – 743°F
Zamak 5, also known as Zinc Alloy 5, is well-known for its higher copper content which enhances strength, hardness, and corrosion resistance compared to Zamak 3. It is an excellent choice for CNC machining parts that require extra strength.
Tensile Strength: 330 MPa, 48,000 psi
Yield Strength: 295 MPa, 43,000 psi
Shear Modulus: 41.5 GPa
Elongation at Break: 7%
Hardness (Brinell): 91
Density: 6.7 g/cm³, 0.242 lb/in³
Maximum Temp: 380 – 390°C, 716 – 734°F
ZA-8, also known as Zinc Aluminum Alloy 8, is characterized by its higher aluminum content compared to other zinc alloys. Its improved strength, hardness, and ability to be cast with thin walls make it an excellent choice for intricate, high-precision CNC parts.
Tensile Strength: 386 MPa, 56,000 psi
Yield Strength: 361 MPa, 52,300 psi
Shear Modulus: 43 GPa
Elongation at Break: 10%
Hardness (Brinell): 106
Density: 6.1 g/cm³, 0.22 lb/in³
Maximum Temp: 370 – 380°C, 698 – 716°F
