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AWS BMg-1 vs. EN 1.4303 Stainless Steel

AWS BMg-1 belongs to the magnesium alloys classification, while EN 1.4303 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 EN 1.4303 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
200
Elongation at Break, % 3.8
13 to 49
Fatigue Strength, MPa 72
220 to 320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 100
420 to 540
Tensile Strength: Ultimate (UTS), MPa 180
590 to 900
Tensile Strength: Yield (Proof), MPa 110
230 to 560

Thermal Properties

Latent Heat of Fusion, J/g 350
290
Maximum Temperature: Mechanical, °C 130
940
Melting Completion (Liquidus), °C 600
1420
Melting Onset (Solidus), °C 440
1380
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 76
15
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 55
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
17
Density, g/cm3 1.8
7.8
Embodied Carbon, kg CO2/kg material 22
3.2
Embodied Energy, MJ/kg 160
46
Embodied Water, L/kg 980
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
110 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 120
140 to 800
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 66
25
Strength to Weight: Axial, points 27
21 to 32
Strength to Weight: Bending, points 39
20 to 26
Thermal Diffusivity, mm2/s 43
4.0
Thermal Shock Resistance, points 10
13 to 20

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 0.060
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
64.8 to 72
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
11 to 13
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.045
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