Magnesium AZ91A-F Die Cast Alloy (UNS M11910)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations

Introduction

The magnesium Azxx alloy series is the most widely used series based on magnesium. These alloys have moderate strength, good ductility and toughness. They can be cast, formed, and forged.

The following sections will discuss in detail about magnesium AZ91A-F die cast alloy.

Chemical Composition

The chemical composition of magnesium AZ91A-F alloy is outlined in the following table.

Element Content (%)
Aluminum, Al 9
Zinc, Zn 0.70
Manganese, Mn 0.13
Magnesium, Mg Remainder

Physical Properties

The physical properties of magnesium AZ91A-F alloy are tabulated below.

Properties Metric Imperial
Density 1.81 g/cm3 0.0654 lb/in3
Melting point ≥ 421 °C ≥ 790 °F

Mechanical Properties

The following table shows mechanical properties of magnesium AZ91A-F alloy.

Properties Metric Imperial
Tensile strength 230 MPa 33400 psi
Yield strength 150 MPa 21800 psi
Poisson’s ratio 0.35 0.35
Elastic modulus 44.8 GPa 6500 ksi
Elongation 3% 3%
Hardness, Brinell 63 63
Hardness, Knoop 84 84
Hardness, Rockwell E 75 75
Hardness, Vickers 71 71
Machinability 100 100

Thermal Properties

The thermal properties of magnesium AZ91A-F alloy are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@0.000-100°C/32-212°F) 26.0 µm/m°C 14.4 µin/in°F
Thermal conductivity 72.7 W/mK 505 BTU in/hr.ft².°F

Other Designations

Equivalent materials to magnesium AZ91A-F alloy are as follows:

  • AMS 4490
  • ASTM B 94
  • SAE J465
  • ASTM A276
  • ASTM A580
  • ASTM A412

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