Magnesium AM100A-F (UNS M10100)

May 2 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Applications
Other Designations

Introduction

Magnesium is among the most abundantly available elements in the earth’s crust. It has a silvery-white appearance and is commonly alloyed with aluminum, zinc, lead and other non-ferrous metals. Magnesium AM100A-F alloy exhibits good weldability, tensile and yield strength and elongation. It is used in sand casting and permanent mold casting.

This datasheet looks into the properties and applications of magnesium AM100A-F alloy.

Chemical Composition

The table below provides data on the composition of the magnesium AM100A-F alloy.

Element Content (%)
Magnesium, Mg 90
Aluminum, Al 9.3-10.7
Silicon, Si ≤0.30
Zinc, Zn ≤0.30
Manganese, Mn ≤0.10
Copper, Cu ≤0.10
Nickel, Ni ≤0.010

Physical Properties

The physical properties of magnesium AM100A-F cast alloy are as per the table below.

Properties Metric Imperial
Density 1.83 g/cm³ 0.0661 lb/in³
Melting point (incipient melting) ≥430°C ≥806°F

Mechanical Properties

The mechanical properties of die cast magnesium AM100A-F alloy are given in the table below.

Properties Metric Imperial
Tensile strength 150 MPa 21800 psi
Yield strength (@strain 0.200) 83 MPa 12000 psi
Compressive yield strength 83 MPa 12000 psi
Shear modulus 17 GPa 2470 ksi
Shear Strength 125 MPa 18100 psi
Elastic modulus 45 GPa 6530 ksi
Poisson's ratio 0.35 0.35
Elongation at break (in 50 mm) 2% 2%
Hardness, Brinell (500 kg load, 10 mm ball) 53 53
Hardness, Rockwell E 61 61
Hardness, Vickers 68 68
Machinability 100% 100%

Thermal Properties

The thermal properties of magnesium AM100A-F alloy are as per the table below:

Properties Metric Imperial
Thermal expansion co-efficient (@ 0.000-100°C/32-212°F) 25 µm/m°C 13.9 µin/in°F
Thermal Conductivity 73 W/m K 507 BTU-in/hr ft2 °F

Applications

Magnesium AM100A-F alloy is mainly used in the making of sand casts and permanent molds.

Other Designations

Some of the other designations used to denote magnesium AM100A alloy are as below:-

  • ASTM B80
  • ASTM B 199
  • AMS 4455 T6 temper
  • ASTM B 403 (Ingot UNS M10101)
  • SAE J465
  • Old SAE 502

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