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AWS BMg-1 vs. EN 1.4821 Stainless Steel

AWS BMg-1 belongs to the magnesium alloys classification, while EN 1.4821 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 1.4821 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
200
Elongation at Break, % 3.8
18
Fatigue Strength, MPa 72
280
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 18
79
Shear Strength, MPa 100
450
Tensile Strength: Ultimate (UTS), MPa 180
730
Tensile Strength: Yield (Proof), MPa 110
450

Thermal Properties

Latent Heat of Fusion, J/g 350
310
Maximum Temperature: Mechanical, °C 130
1100
Melting Completion (Liquidus), °C 600
1410
Melting Onset (Solidus), °C 440
1370
Specific Heat Capacity, J/kg-K 980
490
Thermal Conductivity, W/m-K 76
17
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 55
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 1.8
7.6
Embodied Carbon, kg CO2/kg material 22
2.9
Embodied Energy, MJ/kg 160
41
Embodied Water, L/kg 980
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
110
Resilience: Unit (Modulus of Resilience), kJ/m3 120
500
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 66
26
Strength to Weight: Axial, points 27
26
Strength to Weight: Bending, points 39
23
Thermal Diffusivity, mm2/s 43
4.6
Thermal Shock Resistance, points 10
21

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
0.1 to 0.2
Chromium (Cr), % 0
24.5 to 26.5
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
64.2 to 71.1
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0 to 2.0
Nickel (Ni), % 0 to 0.0050
3.5 to 5.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.050
0.8 to 1.5
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 1.7 to 2.3
0
Residuals, % 0 to 0.3
0