Reference Tables

Mechanical Properties
Alloy #3 #5 #7 #2 ZA-8
Ultimate Tensile Strength
(psi x 10³)
41 48 41 52 54
Yield Strength 0.2% Offset
(psi x 10³)
- - - - 42
Elongation
(% In 2")
10 7 13 7 6-10
Shear Strength
(psi x 10)
31 38 31 46 -
Hardness
(Brinell)
82 91 80 100 95-110
Impact Strength
(ft-lb)
43 38 43 35 31
Fatigue Strength Rotary Bend
(psi x 10³) (5 x 108 Cycles)
6.9 8.2 6.8 8.5 -
Compressive Yield Strength
0.1 Offset (psi x 10³)
60 87 60 93 -
Physical Properties
Alloy #3 #5 #7 #2 ZA-8
Density
(lb/cu in)
.24 .24 .24 .24 .227
Melting Range
(°F)
719-728 717-727 718-728 715-734 707-759
Electrical Conductivity
(% IACS)
27 26 27 25 27.7
Thermal Conductivity
(BTU/ft-hr°F)
65.3 62.9 65.3 60.5 66.3
Coefficient Of Thermal Expansion
(68-212°F) (u in/in/°F)
15.2 15.2 15.2 15.4 12.9
Specific Heat
(BTU/lb°F)
.10 .10 .10 .10 .104
Pattern Or Die Shrinkage .006 in/in .006 in/in .006 in/in .006 in/in 1/8 in/ft
.007 in/in
Chemical Specifications (Per ASTM)
Alloy #3 #5 #7 #2 ZA-8
Ingot Casting Ingot Casting Ingot Casting Ingot Ingot
Aluminum 3.9-4.3 3.5-4.3 3.9-4.3 3.5-4.3 3.9-4.3 3.5-4.3 3.9-4.3 8.0-8.8
Magnesium .025-.050 .02-.05 .03-.06 .03-.08 .01-.02 .005-.020 .025-.050 .015-.030
Copper .10 max .25 max .75-1.25 .75-1.25 .10 max .25 max 2.6-2.9 0.8-1.3
Iron (max) .075 .10 .075 .10 .075 .075 .075 .10
Lead (max) .004 .005 .004 .005 .002 .003 .004 .004
Cadmium (max) .003 .004 .003 .004 .002 .002 .003 .003
Tin (max) .002 .003 .002 .003 .001 .001 .002 .002
Nickel - - - - .005-.020 .005-.020 - -
Zinc Balance Balance Balance Balance Balance Balance Balance Balance

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