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AWS BMg-1 vs. EN 1.4031 Stainless Steel

AWS BMg-1 belongs to the magnesium alloys classification, while EN 1.4031 stainless steel belongs to the iron alloys. There are 30 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 BMg-1 and the bottom bar is EN 1.4031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
190
Elongation at Break, % 3.8
11 to 13
Fatigue Strength, MPa 72
220 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
76
Shear Strength, MPa 100
400 to 540
Tensile Strength: Ultimate (UTS), MPa 180
670 to 900
Tensile Strength: Yield (Proof), MPa 110
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 350
280
Maximum Temperature: Mechanical, °C 130
770
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 440
1400
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 76
30
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 55
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
7.0
Density, g/cm3 1.8
7.7
Embodied Carbon, kg CO2/kg material 22
1.9
Embodied Energy, MJ/kg 160
27
Embodied Water, L/kg 980
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 120
380 to 1360
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 66
25
Strength to Weight: Axial, points 27
24 to 32
Strength to Weight: Bending, points 39
22 to 27
Thermal Diffusivity, mm2/s 43
8.1
Thermal Shock Resistance, points 10
23 to 32

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
0.36 to 0.42
Chromium (Cr), % 0
12.5 to 14.5
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
83 to 87.1
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
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.050
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 1.7 to 2.3
0
Residuals, % 0 to 0.3
0