Magnesium AZ80A-F (UNS M11800) Alloy

Jul 31 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations

Introduction

Magnesium is among the most abundantly available metals on the Earth’s crust. It is silvery white in appearance and exhibits good machinability. It is commonly alloyed with non-ferrous metals like aluminum, copper, nickel, etc.

Magnesium AZ80A-F 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-F 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-F alloy are given in the following table.

Properties Metric Imperial
Density 1.80 g/cm³ 0.0650 lb/in³
Melting Point (Incipient melting) ≥427°C ≥801°F

Mechanical Properties

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

Properties Metric Imperial
Tensile Strength 340 Mpa 49300 psi
Yield strength (at strain 0.200%) 250 MPa 36300 psi
Ultimate Bearing Strength 550 MPa 79800 psi
Bearing Yield Strength 350 MPa 50800 psi
Elongation at break (in 50 mm) 7% 7%
Elastic Modulus (in tension) 45 GPa 6530 ksi
Poisson's ratio 0.35 0.35
Shear Modulus 17 GPa 2470 ksi
Shear Strength 150 MPa 21800 psi
Machinability (relative rating, 100=Best) 100 100
Hardness, Brinell (500 kg load, 10 mm ball) 67 67
Hardness, Knoop (estimated from Brinell) 90 90
Hardness, Vickers (estimated from Brinell) 77 77

Thermal Properties

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

Properties Metric Imperial
Thermal expansion co-efficient (at 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-F alloy are:-

  • UNS M11800

 

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