Jun 26 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications
Introduction
Magnesium is a strong, silvery-white, light-weight metal that tarnishes slightly when exposed to air. Magnesium QE22A-T6 alloy is a casting alloy having excellent tensile, fatigue and creep properties at elevated and room temperatures. It is weldable and pressure tight.
The following datasheet gives an overview of magnesium QE22A-T6 alloy.
Chemical Composition
The following table shows the chemical composition of magnesium QE22A-T6 alloy.
|
Element |
Content (%) |
|
Magnesium, Mg |
95 |
|
Silver, Ag |
2-3 |
|
Neodymium, Nd |
1.7 - 2.5 |
|
Zirconium, Zr |
0.40 - 1 |
|
Copper, Cu |
≤ 0.10 |
|
Nickel, Ni |
≤ 0.010 |
Physical Properties
The physical properties of magnesium QE22A-T6 alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
1.82 g/cm³ |
0.0658 lb/in³ |
Mechanical Properties
The mechanical properties of cast magnesium QE22A-T6 alloy are listed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
260 MPa |
37700 psi |
|
Yield strength (@ strain 0.2%) |
195 MPa |
28300 psi |
|
Compressive yield strength (at 0.2% offset) |
195 MPa |
28300 psi |
|
Compressive strength |
193 MPa |
28000 psi |
|
Fatigue strength (@# of cycles 1.00e+7/ 250°C) |
53 MPa |
7690 psi |
|
Shear strength |
160 MPa |
23200 psi |
|
Shear modulus |
17 GPa |
2470 ksi |
|
Compressive modulus |
44 GPa |
6380 ksi |
|
Elastic modulus |
45 GPa |
6530 ksi |
|
Poisson's ratio |
0.35 |
0.35 |
|
Elongation at break (in 50 mm) |
3% |
3% |
|
Brinell hardness (500 kg load, 10 mm ball) |
80 |
80 |
|
Knoop hardness (estimated from Brinell) |
103 |
103 |
|
Rockwell B hardness (estimated from Brinell) |
49 |
49 |
|
Vickers hardness (estimated from Brinell) |
90 |
90 |
|
Machinability (relative rating, 100=best) |
100 |
100 |
Thermal Properties
The following table outlines the thermal properties of magnesium QE22A-T6 alloy.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@ 0-100°C/32-212°F) |
26.7 µm/m°C |
14.8 µin/in°F |
|
Thermal conductivity |
113 W/mK |
784 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to magnesium QE22A-T6 alloy include:
-
EN 1753
-
MC65210
-
AMS 4418
-
ASTM B 80
-
ASTM B 199
-
ASTM B 403
Applications
Magnesium QE22A-T6 alloy is typically used for commercial and military sand and permanent mold castings with high yield strengths at temperatures up to 200°C (392°F). It is widely used in aerospace applications.