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Standard Zinc Alloys

#4 zinc alloy was first found in Asia. Its copper content is between #3 and #5 zinc alloys, thus enjoying a higher strength yet similar formability as #3. #4 is more effective than #3 in reducing the soldering, or die sticking, during die casting.

Applications

Bathroom accessories, kitchenware, fashion accessories such as zippers

Typical Properties

Typical Physical Properties:

  • Density (g/cm3):  6.6
  • Melting Range (oC):  380-386
  • Electrical Conductivity (% IACS):  26-27
  • Thermal Conductivity (100oC, W/m ‧ K):  108.9-113.0
  • Specific Heat (J/kg  ‧  K):  419
  • Die Shrinkage (mm/mm):  0.007
  • Coefficient of Thermal Expansion (20-100oC, μm/m/oC):  27.4

Typical Mechanical Properties:

  • Ultimate Tensile Strength (MPa):  317
  • Impact Strength (J):  61
  • Elongation (%):  7
  • Hardness (HB):  92
  • Shear Strength (MPa):  214 - 262
  • Yield Strength (0.2%, MPa):  221 - 269
  • Fatigue Strength (5 x 108 cycles, MPa):  48 - 57
  • Compressive Yield Strength (0.1%, MPa):  414 - 600

Compliance with International Standards

RoHS 

Packaging

  • Average Mass per Slab (kg):  10
  • Slab Dimensions (mm):  480 x 110 x 45
  • Average Mass per Bundle (kg):  1,100 ± 50
  • Bundle Dimensions (mm):  460 x 960 x 610
  • Number per Bundle:  112

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