Jul 30 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications
Introduction
Magnesium alloys are used for both cast and forged components, and have the ability to absorb energy elastically owing to their low modulus of elasticity. Magnesium AZ92A-F alloy can be cast, formed, and forged. It has good ductility and toughness and moderate strength.
The following datasheet gives an overview of magnesium AZ92A-F alloy.
Chemical Composition
The following table shows the chemical composition of magnesium AZ92A-F alloy.
|
Element |
Content (%) |
|
Magnesium, Mg |
89 |
|
Aluminum, Al |
8.3 - 9.7 |
|
Zinc, Zn |
1.6 - 2.4 |
|
Silicon, Si |
≤ 0.30 |
|
Copper, Cu |
≤ 0.25 |
|
Manganese, Mn |
≥ 0.10 |
|
Nickel, Ni |
≤ 0.010 |
Physical Properties
The physical properties of magnesium AZ92A-F alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
1.83 g/cm³ |
0.0661 lb/in³ |
Mechanical Properties
The mechanical properties of cast magnesium AZ92A-F alloy are listed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
365 MPa |
52900 psi |
|
Yield strength (at strain 0.2%) |
305 MPa |
44200 psi |
|
Compressive yield strength (at 0.2% offset) |
250 MPa |
36300 psi |
|
Ultimate bearing strength |
585 MPa |
84800 psi |
|
Bearing yield strength |
405 MPa |
58700 psi |
|
Fatigue strength (at number of cycles 1.00e+8) |
55 MPa |
7890 psi |
|
Shear strength |
125 MPa |
18100 psi |
|
Shear modulus |
17 GPa |
2470 ksi |
|
Elastic modulus |
45 GPa |
6530 ksi |
|
Poisson's ratio |
0.35 |
0.35 |
|
Elongation at break (in 50 mm) |
2% |
2% |
|
Brinell hardness (500 kg load, 10 mm ball) |
65 |
65 |
|
Knoop hardness (estimated from Brinell) |
88 |
88 |
|
Rockwell E hardness |
76 |
76 |
|
Vickers hardness (estimated from Brinell) |
75 |
75 |
|
Machinability (relative rating, 100=best) |
100 |
100 |
Thermal Properties
The following table outlines the thermal properties of magnesium AZ92A-F alloy.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (at 0-100°C/32-212°F) |
26 µm/m°C |
14.4 µin/in°F |
|
Thermal conductivity |
52.2 W/mK |
362 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to magnesium AZ92A-F alloy include:
-
SAE J465
-
AMS 4434
-
AMS 4453
-
AMS 4484
-
ASTM B 80
-
ASTM B 199
-
ASTM B 403.
Applications
Magnesium AZ92A-F alloy is typically used for commercial and military pressure-tight sand and permanent-mold castings that have high yield and tensile strengths.