Jul 16 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Applications
Introduction
Magnesium is a silvery-white metal which is used as an alloy element for zinc, lead, aluminum, and other nonferrous alloys. Magnesium alloys have high strength and excellent vibration damping characteristics. Magnesium AZ92A-T5 alloy is ductile, and has moderate strength.
The following datasheet gives an overview of magnesium AZ92A-T5 alloy.
Chemical Composition
The following table shows the chemical composition of magnesium AZ92A-T5 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-T5 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-T5 alloy are listed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
170 MPa |
24700 psi |
|
Yield strength (@ strain 0.2%) |
115 MPa |
16700 psi |
|
Compressive yield strength (at 0.2% offset) |
115 MPa |
16700 psi |
|
Ultimate bearing strength |
345 MPa |
50000 psi |
|
Bearing yield strength |
315 MPa |
45700 psi |
|
Shear strength |
140 MPa |
20300 psi |
|
Fatigue strength (@# of cycles 5e+8) |
76 MPa |
11000 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) |
1% |
1% |
|
Brinell hardness (500 kg load, 10 mm ball) |
69 |
69 |
|
Knoop hardness (estimated from Brinell) |
92 |
92 |
|
Rockwell E hardness |
80 |
80 |
|
Vickers hardness (estimated from Brinell) |
79 |
79 |
|
Machinability (relative rating, 100=best) |
100 |
100 |
Thermal Properties
The following table outlines the thermal properties of magnesium AZ92A-T5 alloy.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@ 0-100°C/32-212°F) |
26 µm/m°C |
14.4 µin/in°F |
|
Thermal conductivity |
58.3 W/mK |
405 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to magnesium AZ92A-T5 alloy include:
-
SAE J465
-
AMS 4434
-
AMS 4453
-
AMS 4484
-
ASTM B 80
-
ASTM B 199
-
ASTM B 403
Fabrication and Heat Treatment
Magnesium AZ92A-T5 alloy is can be welded using gas-shielded and arc-welding techniques. Stress relief is required after welding the alloy. The material is then aged at 260°C (500°F) for 4 h under the as-fabricated F condition.
Applications
Magnesium AZ92A-T5 alloy is typically used for commercial and military pressure-tight sand and permanent-mold castings that have high yield and tensile strengths.