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ISO-WD21150 Magnesium vs. AWS E90C-B9

ISO-WD21150 magnesium belongs to the magnesium alloys classification, while AWS E90C-B9 belongs to the iron 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 ISO-WD21150 magnesium and the bottom bar is AWS E90C-B9.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 5.7 to 11
18
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
75
Tensile Strength: Ultimate (UTS), MPa 240 to 290
710
Tensile Strength: Yield (Proof), MPa 120 to 200
460

Thermal Properties

Latent Heat of Fusion, J/g 350
270
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 550
1410
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 100
25
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 19
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 100
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
7.0
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
2.6
Embodied Energy, MJ/kg 160
37
Embodied Water, L/kg 980
91

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 24
110
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 460
550
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 70
25
Strength to Weight: Axial, points 40 to 48
25
Strength to Weight: Bending, points 52 to 58
23
Thermal Diffusivity, mm2/s 60
6.9
Thermal Shock Resistance, points 15 to 17
20

Alloy Composition

Aluminum (Al), % 2.4 to 3.6
0 to 0.040
Carbon (C), % 0
0.080 to 0.13
Chromium (Cr), % 0
8.0 to 10.5
Copper (Cu), % 0 to 0.050
0 to 0.2
Iron (Fe), % 0 to 0.0050
84.4 to 90.9
Magnesium (Mg), % 94 to 97
0
Manganese (Mn), % 0.15 to 0.4
0 to 1.2
Molybdenum (Mo), % 0
0.85 to 1.2
Nickel (Ni), % 0 to 0.0050
0 to 0.8
Niobium (Nb), % 0
0.020 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.1
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Vanadium (V), % 0
0.15 to 0.3
Zinc (Zn), % 0.5 to 1.5
0
Residuals, % 0
0 to 0.5