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AZ31B-O Magnesium vs. Annealed K94200

AZ31B-O magnesium belongs to the magnesium alloys classification, while annealed K94200 belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AZ31B-O magnesium and the bottom bar is annealed K94200.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 56
130
Elastic (Young's, Tensile) Modulus, GPa 45
140
Elongation at Break, % 12
32
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 17
54
Shear Strength, MPa 140
330
Tensile Strength: Ultimate (UTS), MPa 240
500
Tensile Strength: Yield (Proof), MPa 120
270

Thermal Properties

Melting Onset (Solidus), °C 600
1440
Specific Heat Capacity, J/kg-K 990
500
Thermal Conductivity, W/m-K 100
15
Thermal Expansion, µm/m-K 26
5.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 95
3.0

Otherwise Unclassified Properties

Density, g/cm3 1.7
8.2

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25
130
Resilience: Unit (Modulus of Resilience), kJ/m3 170
250
Stiffness to Weight: Axial, points 15
9.8
Stiffness to Weight: Bending, points 70
21
Strength to Weight: Axial, points 39
17
Strength to Weight: Bending, points 50
17
Thermal Diffusivity, mm2/s 62
3.7
Thermal Shock Resistance, points 14
49