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ASTM A203 Steel vs. AZ92A Magnesium

ASTM A203 steel belongs to the iron alloys classification, while AZ92A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 ASTM A203 steel and the bottom bar is AZ92A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
47
Elongation at Break, % 22 to 26
2.1 to 6.8
Fatigue Strength, MPa 210 to 280
76 to 90
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
18
Shear Strength, MPa 330 to 370
97 to 160
Tensile Strength: Ultimate (UTS), MPa 520 to 590
170 to 270
Tensile Strength: Yield (Proof), MPa 290 to 390
83 to 140

Thermal Properties

Latent Heat of Fusion, J/g 250
350
Maximum Temperature: Mechanical, °C 410
130
Melting Completion (Liquidus), °C 1460
590
Melting Onset (Solidus), °C 1420
440
Specific Heat Capacity, J/kg-K 470
980
Thermal Conductivity, W/m-K 52
44 to 58
Thermal Expansion, µm/m-K 13
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
11 to 12
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5 to 8.7
53 to 62

Otherwise Unclassified Properties

Base Metal Price, % relative 3.2 to 4.0
12
Density, g/cm3 7.9
1.8
Embodied Carbon, kg CO2/kg material 1.6 to 1.7
22
Embodied Energy, MJ/kg 21 to 23
160
Embodied Water, L/kg 50 to 52
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
4.0 to 14
Resilience: Unit (Modulus of Resilience), kJ/m3 230 to 410
73 to 220
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
67
Strength to Weight: Axial, points 18 to 21
26 to 41
Strength to Weight: Bending, points 18 to 20
38 to 51
Thermal Diffusivity, mm2/s 14
25 to 33
Thermal Shock Resistance, points 15 to 17
10 to 16