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AWS BMg-1 vs. EN 1.4805 Stainless Steel

AWS BMg-1 belongs to the magnesium alloys classification, while EN 1.4805 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 1.4805 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
200
Elongation at Break, % 3.8
9.0
Fatigue Strength, MPa 72
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Tensile Strength: Ultimate (UTS), MPa 180
490
Tensile Strength: Yield (Proof), MPa 110
250

Thermal Properties

Latent Heat of Fusion, J/g 350
310
Maximum Temperature: Mechanical, °C 130
1000
Melting Completion (Liquidus), °C 600
1390
Melting Onset (Solidus), °C 440
1350
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 76
14
Thermal Expansion, µm/m-K 26
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
26
Density, g/cm3 1.8
7.9
Embodied Carbon, kg CO2/kg material 22
4.7
Embodied Energy, MJ/kg 160
66
Embodied Water, L/kg 980
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
37
Resilience: Unit (Modulus of Resilience), kJ/m3 120
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 66
25
Strength to Weight: Axial, points 27
17
Strength to Weight: Bending, points 39
18
Thermal Diffusivity, mm2/s 43
3.7
Thermal Shock Resistance, points 10
11

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
0.2 to 0.5
Chromium (Cr), % 0
19 to 23
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
44.9 to 56.8
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.0050
23 to 27
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.050
1.0 to 2.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 1.7 to 2.3
0
Residuals, % 0 to 0.3
0