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AWS BMg-1 vs. S44330 Stainless Steel

AWS BMg-1 belongs to the magnesium alloys classification, while S44330 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 S44330 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
200
Elongation at Break, % 3.8
25
Fatigue Strength, MPa 72
160
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 18
78
Shear Strength, MPa 100
280
Tensile Strength: Ultimate (UTS), MPa 180
440
Tensile Strength: Yield (Proof), MPa 110
230

Thermal Properties

Latent Heat of Fusion, J/g 350
290
Maximum Temperature: Mechanical, °C 130
990
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 440
1390
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 76
21
Thermal Expansion, µm/m-K 26
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 55
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 12
13
Density, g/cm3 1.8
7.7
Embodied Carbon, kg CO2/kg material 22
2.8
Embodied Energy, MJ/kg 160
40
Embodied Water, L/kg 980
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
91
Resilience: Unit (Modulus of Resilience), kJ/m3 120
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 66
25
Strength to Weight: Axial, points 27
16
Strength to Weight: Bending, points 39
17
Thermal Diffusivity, mm2/s 43
5.7
Thermal Shock Resistance, points 10
16

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 to 0.025
Chromium (Cr), % 0
20 to 23
Copper (Cu), % 0 to 0.050
0.3 to 0.8
Iron (Fe), % 0 to 0.0050
72.5 to 79.7
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0 to 1.0
Nickel (Ni), % 0 to 0.0050
0
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0
0 to 0.025
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.050
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0
0 to 0.8
Zinc (Zn), % 1.7 to 2.3
0
Residuals, % 0 to 0.3
0