Magnesium HK31A-T6 Alloy (UNS M13310)

Aug 2 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties

Introduction

Magnesium HK31A alloy series are known to possess good castability, pressure tightness, and creep resistant to 350°C (662°F).

The following datasheet gives an overview of magnesium HK31A- T6 alloy.

Chemical Composition

The following table shows the chemical composition of magnesium HK31A- T6 alloy.

Element Content (%)
Magnesium, Mg 96
Thorium, Th 2.5-4
Zirconium, Zr 0.40-1
Zinc. Zn ≤ 0.30
Copper, Cu ≤ 0.10
Nickel, Ni ≤ 0.010

Physical Properties

The physical properties of magnesium HK31A- T6 alloy are given in the following table.

Properties Metric Imperial
Density 1.80 g/cm³ 0.0650 lb/in³
Melting point 590-650°C 1090-1200°F

Mechanical Properties

The mechanical properties of magnesium HK31A- T6 cast alloy are outlined in the following table.

Properties Metric Imperial
Tensile strength 220 MPa 31900 psi
Yield strength (@strain 0.200 %) 105 MPa 15200 psi
Elongation at break 8% 8%
Poisson's ratio 0.35 0.35
Elastic modulus 45 GPa 6530 ksi
Shear modulus 17 GPa 2470 ksi
Hardness, Brinell 55 55
Hardness, Knoop 70 70
Machinability 100 100

Thermal Properties

The thermal properties of magnesium HK31A- T6 alloy are highlighted in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@0.000-100°C/32-212°F) 26.8 µm/m°C 14.9 µin/in°F
Thermal conductivity 92W/mK 638 BTU in/hr.ft².°F

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