Jul 18 2013
Magnesium is among the most abundantly available metals on the earth’s crust. Its applications are limited by its easily ignitable nature. It is commonly alloyed with non-ferrous metals like aluminum, copper, nickel, etc.
Magnesium AZ63A-T7 is a sand cast alloy, which exhibits good strength at room temperature. The ductility and toughness of this alloy are also considerably high. This datasheet will elaborate on the properties and applications of this alloy.
Chemical Composition
The following table provides the chemical composition of magnesium AZ63A-T7 alloy.
| Element |
Content (%) |
| Magnesium, Mg |
91 |
| Aluminum, Al |
5.3-6.7 |
| Zinc, Zn |
2.5-3.5 |
| Silicon, Si |
≤0.30 |
| Copper, Cu |
≤0.25 |
| Manganese, Mn |
≥0.15 |
| Nickel, Ni |
≤0.010 |
Physical Properties
The physical properties of magnesium AZ63A-T7 alloy are given in the following table.
| Properties |
Metric |
Imperial |
| Density |
1.83 g/cc |
0.0661 lb/in³ |
| Melting Point(Incipient melting) |
≥360°C |
≥680°F |
Mechanical Properties
The mechanical properties of magnesium AZ63A-T7 alloy are listed in the table below.
| Properties |
Metric |
Imperial |
| Tensile Strength |
275 MPa |
39900 psi |
| Yield strength (@strain 0.200%) |
115 MPa |
16700 psi |
| Compressive Yield Strength (at 0.2% offset) |
115 MPa |
16700 psi |
| Ultimate Bearing Strength |
515 MPa |
74700 psi |
| Bearing Yield Strength |
515 MPa |
74700 psi |
| Elongation at break (in 50 mm) |
6% |
6% |
| Elastic Modulus (in tension) |
45 GPa |
6530 ksi |
| Poisson's ratio |
0.35 |
0.35 |
| Shear Modulus |
17 GPa |
2470 ksi |
| Shear Strength |
140 MPa |
20300 psi |
| Machinability (relative rating, 100=Best) |
100 |
100 |
| Hardness, Brinell (500 kg load, 10 mm ball) |
64 |
64 |
| Hardness, Knoop (estimated from Brinell) |
87 |
87 |
| Hardness, Vickers (estimated from Brinell) |
76 |
76 |
| Hardness, Rockwell E |
76 |
76 |
Thermal Properties
The following table provides the thermal properties of magnesium AZ63A-T7 alloy.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@ 0.000-100°C/32-212°F) |
26.1 µm/m°C |
14.5 µin/in°F |
| Thermal Conductivity |
65.1 W/mK |
452 BTU in/hr.ft².°F |
Other Designations
Some of the other designations that are used to denote magnesium AZ63A-T7 alloy are:
- UNS M11630
- Elektron AZG
- AMS 4420
- AMS 4422
- ASTM B 80
Applications
Magnesium AZ63A-T7 alloy is used in the manufacture of commercial and military structures that require medium strength and good ductility and toughness.