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WHY USE DIE CASTINGS? 
This page provides technical data and specifications.

MATERIAL SELECTION FACTOR

    ZINC
ALLOYS
ALUMINUM
ALLOYS
Mechanical
Properties
Tensile strength
Impact strength
Elongation
Dimensional stability
Brinell hardness
1 strongest
1 toughest
1
1
1 hardest
2
2
2
1
2
Physical
Constants
Electrical conductivity
Thermal conductivity
Melting point
Weight per cubic inch
2
2
1 lowest
2
1 highest
1 highest
2
1 lowest
Casting
Characteristics

Ease and speed in casting
Complexity of shape
Dimensional accuracy
Minimum section thickness
Surface smoothness

1
1
1
1
1
2
2
2
2
2
Cost Production
Machining
Finishing
Cost per piece
1
1
1
1
2
2
2
2

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MECHANICAL PROPERTIES

ALLOY #3 #5 #7 #2 #ZA-8
  Die
Cast
Die
Cast
Die
Cast
Die
Cast
Die
Cast
Ultimate Tensile Strength
(psi x 103)
41 48 41 52 54
Elongation (% in 2") 10 7 13 7 6-10
Shear Strength (psi x 103) 31 38 31 46
Hardness (Brinell) 82 91 80 100 95-110
Impact Strength (ft-lb) 43 48 43 35 31
Fatigue Strength
Rotary Band
(psi x 103) (5 x 105 cycles)
6.9 8.2 6.8 8.5
Compressive Yield Strength
0.1% Offset (psi x 103)
60 87 60 93

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PHYSICAL PROPERTIES

ALLOY #3 #5 #7 #2 #ZA-8
Density (lb./cu. in.) 0.24 0.24 0.24 0.24 .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
Coef. 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)
0.10 0.10 0.10 0.10 0.104
Pattern or Die
Shrinkage
0.006
in/in
0.006
in/in
0.006
in/in
0.006
in/in
1/8  .007
in/ft  in/in

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CHEMICAL SPECIFICATIONS (Per ASTM)

ALLOY   Al Mg Cu
#3 Ingot
3.9-4.3 0.025-0.050 0.10 Max
  Casting 3.5-4.3 0.002-0.05 0.25 Max
#5 Ingot 3.9-4.3 0.03-0.06 0.75-1.25
  Casting 3.5-4.3 0.03-0.08 0.75-1.25
#7 Ingot 3.9-4.3 0.01-0.02 0.10 Max
  Casting 3.5-4.3 0.005-0.020 0.25 Max
#2 Ingot5 3.9-4.3 0.025-0.050 2.6-2.9
ZA-8 Ingot 8.0-8.8 0.015-0.030 0.08-1.3
         
ALLOY   Fe (max) Pb (max) Cd (max)
#3 Ingot 0.075 0.004 0.003
  Casting 0.10 0.005 0.004
#5 Ingot 0.075 0.004 0.003
  Casting 0.010 0.005 0.004
#7 Ingot 0.075 0.002 0.002
  Casting 0.075 0.003 0.002
#2 Ingot5 0.075 0.004 0.003
ZA-8 Ingot 0.10 0.004 0.003
         
ALLOY   Sn (max) Ni Zn
#3 Ingot 0.002 Balance
  Casting 0.003 Balance
#5 Ingot 0.002 Balance
  Casting 0.003 Balance
#7 Ingot 0.001 0.005-0.020 Balance
  Casting 0.001 0.005-0.020 Balance
#2 Ingot5 0.002 Balance
ZA-8 Ingot 0.002 Balance

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