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AWS BMg-1 vs. SAE-AISI S2 Steel

AWS BMg-1 belongs to the magnesium alloys classification, while SAE-AISI S2 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 BMg-1 and the bottom bar is SAE-AISI S2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
72
Tensile Strength: Ultimate (UTS), MPa 180
670 to 1940

Thermal Properties

Latent Heat of Fusion, J/g 350
260
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 440
1410
Specific Heat Capacity, J/kg-K 980
470
Thermal Conductivity, W/m-K 76
44
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 55
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
2.6
Density, g/cm3 1.8
7.8
Embodied Carbon, kg CO2/kg material 22
2.1
Embodied Energy, MJ/kg 160
30
Embodied Water, L/kg 980
49

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 66
24
Strength to Weight: Axial, points 27
24 to 69
Strength to Weight: Bending, points 39
22 to 44
Thermal Diffusivity, mm2/s 43
12
Thermal Shock Resistance, points 10
23 to 68

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Beryllium (Be), % 0.00020 to 0.00080
0
Carbon (C), % 0
0.4 to 0.55
Copper (Cu), % 0 to 0.050
0 to 0.25
Iron (Fe), % 0 to 0.0050
96 to 98.1
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0.3 to 0.5
Molybdenum (Mo), % 0
0.3 to 0.6
Nickel (Ni), % 0 to 0.0050
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.050
0.9 to 1.2
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
0 to 0.5
Zinc (Zn), % 1.7 to 2.3
0
Residuals, % 0 to 0.3
0