Magnesium AZ80A-T5 (UNS M11800) Extruded Alloy

Jul 18 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations

Introduction

Magnesium is a silvery white metal that is abundantly available in earth’s crust. It is easily ignitable in nitrogen and carbon dioxide environments. Aluminum, nickel, copper and zinc are some of the metals with which it is commonly alloyed.

Magnesium AZ80A-T5 is an extruded alloy, similar in features to AZ61A-F but is superior to it in strength. This datasheet will elaborate on the properties and applications of this alloy.

Chemical Composition

The following table provides details on the composition of magnesium AZ80A-T5 extruded alloy.

Element Content (%)
Magnesium, Mg 91
Aluminum, Al 7.8-9.2
Zinc, Zn 0.2-0.8
Manganese, Mn ≥0.12
Silicon, Si ≤0.10
Copper, Cu ≥0.050
Nickel, Ni ≤0.0050
Iron, Fe ≤0.0050

Physical Properties

The physical properties of magnesium AZ80A-T5 extruded alloy are given in the following table.

Properties Metric Imperial
Density 1.80 g/cc 0.0650 lb/in³
Melting Point (Incipient melting) ≥427°C ≥801°F

Mechanical Properties

The mechanical properties of magnesium AZ80A-T5 extruded alloy are listed in the table below.

Properties Metric Imperial
Tensile Strength 380 MPa 55100 psi
Yield strength (@strain 0.200%) 275 MPa 39900 psi
Compressive Yield Strength (@0.2% offset) 240 MPa 34800 psi
Elongation at break (in 50 mm) 7% 7%
Elastic Modulus (in tension) 45 GPa 6530 ksi
Poisson's ratio (estimated from similar Mg alloys) 0.35 0.35
Shear Modulus 17 GPa 2470 ksi
Shear Strength 165 MPa 23900 psi
Machinability (relative rating, 100=Best) 100 100
Hardness, Brinell (500 kg load, 10 mm ball) 82 82
Hardness, Knoop (estimated from Brinell) 106 106
Hardness, Vickers (estimated from Brinell) 93 93
Hardness, Rockwell A (estimated from Brinell) 35 35
Hardness, Rockwell B (estimated from Brinell) 50 50

Thermal Properties

The following table provides the thermal properties of magnesium AZ80A-T5 extruded alloy.

Properties Metric Imperial
Thermal expansion co-efficient (@ 0.000-100°C/32-212°F) 26 µm/m°C 14.4 µin/in°F
Thermal Conductivity 76 W/mK 527 BTU in/hr.ft².°F

Other Designations

Some of the other designations that are used to denote magnesium AZ80A-T5 extruded alloy are:

  • UNS M11800

 

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