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| WHY USE DIE CASTINGS? |
| This page provides technical data and specifications. |
MATERIAL SELECTION FACTOR
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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 |
:: back to top ::
MECHANICAL PROPERTIES
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| ALLOY |
#3 |
#5 |
#7 |
#2 |
#ZA-8 |
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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 |
:: back to top ::
CHEMICAL SPECIFICATIONS (Per ASTM) |
| ALLOY |
|
Al |
Mg |
Cu |
| #3 |
Ingot
|
3.9-4.3 |
0.025-0.050 |
0.10 Max |
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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 |
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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 |
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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 |
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| ALLOY |
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Fe (max) |
Pb (max) |
Cd (max) |
| #3 |
Ingot |
0.075 |
0.004 |
0.003 |
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Casting |
0.10 |
0.005 |
0.004 |
| #5 |
Ingot |
0.075 |
0.004 |
0.003 |
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Casting |
0.010 |
0.005 |
0.004 |
| #7 |
Ingot |
0.075 |
0.002 |
0.002 |
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Casting |
0.075 |
0.003 |
0.002 |
| #2 |
Ingot5 |
0.075 |
0.004 |
0.003 |
| ZA-8 |
Ingot |
0.10 |
0.004 |
0.003 |
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| ALLOY |
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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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