World-class aluminum and zinc die cast products



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History

Wilkast was founded in 1979 by Tom, Sr. and Pat Wilkerson.

In the early years, Wilkast began by casting highly decorative zinc castings for the plumbing industry. These chrome plated parts proved to set Wilkast apart from other die casters due to the difficult nature of these surface finishes. As the company grew in the 1980’s, new opportunities emerged in different markets and soon Wilkast found itself casting very high volume programs for the automotive industry. Some of these programs reaching 1.5 million parts/yr. During 1990’s, Wilkast expanded its’ markets once again by moving into the motorcycle hardware industry which it was well suited for due to the company’s earlier emphasis on Class A surface requirements. In 2000, the company was sold to Tom and Curt Wilkerson (sons of the original owners) and they continue their ownership and management as of today. During this same year, Wilkast introduced aluminum alloys into the product mix and set off to cast products for the Office Furniture industry as well as others. Today, we cast for over 10 major industries and manage over 300 part numbers. 


  Aluminum Die Casting Alloys Zinc Die Casting Alloys
  A360 A380 383 B390 A413 518 #2 #3 #5 #7 ZA-8 ZA-12 ZA-27
Ultimate Tensile Strength (ksi) 46 47 45 46 42 45 53 41 48 41 54 59 62
Tensile Yield Strength (ksi) 24 23 22 36 19 28 41 32 39 32 41-43 45-48 52-55
Compressive Yield Strength ( ksi) - - - - - - 93 60 87 60 37 39 52
Elongation (% in 2") 3.5 3.5 3.5 <1 3.5 5.0 7 10 7 13 6-10 4-7 2.0-3.5
Hardness(BHN) 500kg load 10mm ball 75 80 75 120 80 80 100 82 91 80 100-103 95-105 116-122
Shear Strength, (ksi) 26 27 - - 25 29 46 31 38 31 40 43 47
Impact Strength ft-lb ASTM .25" die cast bar - 3 3 - - 7 35 43 48 43 24-35 15-27 7-12
Fatigue Strength (ksi)(Rotary Bent 108) 18 20 21 20 19 20 8.5 6.9 8.2 6.9 15 - 21
Young's Modulus  ( psi x 106) 10.3 10.3 10.3 11.8 - - 12.4 12 11.3
  Aluminum die casting alloys Zinc die casting alloys
  A360 A380 383 B390 A413 518 #2 #3 #5 #7 ZA-8 ZA-12 ZA-27
Density (lbs./in3) 0.095 .098 .099 .098 .096 .093 .24 .24 .24 .24 .227 .218 .181
Melting Range (°F) 1035-1105 1000-1100 960-1080 950-1200 1065-1080 995-1150 715-734 718-728 717-727 718-728 707-759 710-810 708-903
Specific Heat BTU/ lb °F 0.230 0.230 0.230 - 0.230 - .10 .10 .10 .10 .104 .107 .125
Coefficient of Thermal Expansion (µ in./in. °F X 10-6) 11.6 12.1 11.7 10.0 11.9 13.4 15.4 15.2 15.2 15.2 12.9 13.4 14.4
Thermal Conductivity   (BTU / ft hr °F) 65.3 55.6 55.6 77.4 70.21 55.6 60.5 65.3 62.9 65.3 66.3 67.1 72.5
Electrical Conductivity (% IACS) 29 23 23 27 31 24 25.0 27.0 26.0 27.0 27.7 28.3 29.7
Poisson's Ratio .33 .33 .33 - - - .30 .30 .30 .30 .30 .30 .30

 

  Aluminum alloy chemical specifications (% by weight) Zinc alloy chemical specifications (% by weight)
  A360 A380 383 B390 A413 518   #2 #3 #5 #7 ZA-8 ZA-12 ZA-27
Silicon (Si) 9.0-10.0 7.5-9.5 9.5-11.5 16.0-18.0 11.0-13.0 .35 Aluminum (Al) 3.9-4.3 3.9-4.3 3.9-4.3 3.9-4.3 8.2-8.8 10.8-11.5 25.5-28.0
Iron (Fe) 1.3 2.0 1.3 1.3 1.3 1.8 Magnesium (Mg) .025-.05 .03-.06 .03-.06 .01-.02 .02-.03 .02-.03 .012-.02
Copper (Cu) .6 3.0-4.0 2.0-3.0 4.0-5.0 1.0 .25 Copper (Cu) 2.7-3.3 .10 .7-1.1 .10 .9-1.3 .5-1.2 2.0-2.5
Manganese (Mn) .35 .50 .50 .50 .35 .35 Iron (Fe) .035 .035 .035 .075 .035 .05 .07
Magnesium (Mg) .4-.6 .30 .10 .45-.65 .1 7.5-8.5 Lead (Pb) .004 .004 .004 .002 .002 .005 .005
Nickel (Ni) .5 .5 .3 .10 .5 .15 Cadmium (Cd) .003 .003 .003 .002 .005 .005 .005
Zinc (Zn) .5 3.0 3.0 1.5 .5 .15 Tin (Sn) .0015 .0015 .0015 .0010 .002 .002 .002
Tin (Sn) .15 .35 .15 - .15 .15 Nickel (Ni) - - - .005-.020 - - -
Titanium (Ti) - - - .10 - - Zinc (Zn) Bal. Bal. Bal. Bal. Bal. Bal. Bal.
Others (each) - - - .10 - -                
Others (Total) .25 .50 .50 .20 .25 .25                
Aluminum (Al) Bal. Bal. Bal. Bal. Bal. Bal.