Casting Materials

The four main materials used in die cast parts are Aluminum, Zinc, Magnesium and Brass respectively. The following chart will show the similarities and differences of the four main die cast materials.



 
Aluminum

Brass

Magnesium

Zinc
Tensile
strength, psi x 1000
47 55

34

41
Yield
strength, psi x 100 (0.2 pct offset)

23

30 23
Shear
strength, psi x 1000
28 37 20 31
Fatigue
strength, psi x 1000
20 25 14

7

Elongation,
pct in 2 in.
3.50

15

3.0 10
Hardness (Brinell) 80 91 63 82
Specific
gravity
2.71 8.30 1.80 6.60
Weight,
lb/cu. in.
0.098 0.305

0.066

0.24
Melting
point (liquid), °F

1100

1670 1105 728
Thermal
conductivity, CG5
0.23 0.21 0.16 0.27
Thermal
expansion, in./in./°F x 106
12.1 12.0 15.0

15.2

Electrical
conductivity,
pct of copper standard
27 20 10 27
Modulus of
elasticity, psi x 106
10.3 15

6.5

Impact
strength (Charpy), ft/lb

3.0

40 2.0 43.0

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