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AWS ER90S-D2 vs. AZ31C Magnesium

AWS ER90S-D2 belongs to the iron alloys classification, while AZ31C magnesium belongs to the magnesium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (3, 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 AWS ER90S-D2 and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 19
12
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
17
Tensile Strength: Ultimate (UTS), MPa 710
260
Tensile Strength: Yield (Proof), MPa 600
200

Thermal Properties

Latent Heat of Fusion, J/g 260
350
Melting Completion (Liquidus), °C 1450
600
Melting Onset (Solidus), °C 1410
550
Specific Heat Capacity, J/kg-K 470
990
Thermal Conductivity, W/m-K 47
130
Thermal Expansion, µm/m-K 13
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
19
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
98

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
12
Density, g/cm3 7.8
1.7
Embodied Carbon, kg CO2/kg material 1.6
23
Embodied Energy, MJ/kg 21
160
Embodied Water, L/kg 50
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
28
Resilience: Unit (Modulus of Resilience), kJ/m3 980
440
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
70
Strength to Weight: Axial, points 25
42
Strength to Weight: Bending, points 23
53
Thermal Diffusivity, mm2/s 13
74
Thermal Shock Resistance, points 21
16

Alloy Composition

Aluminum (Al), % 0
2.4 to 3.6
Carbon (C), % 0.070 to 0.12
0
Copper (Cu), % 0 to 0.5
0 to 0.1
Iron (Fe), % 95.2 to 97.4
0
Magnesium (Mg), % 0
93.4 to 97
Manganese (Mn), % 1.6 to 2.1
0.15 to 1.0
Molybdenum (Mo), % 0.4 to 0.6
0
Nickel (Ni), % 0 to 0.15
0 to 0.030
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.5 to 0.8
0 to 0.1
Sulfur (S), % 0 to 0.025
0
Zinc (Zn), % 0
0.5 to 1.5
Residuals, % 0
0 to 0.3