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EN 1.4903 Stainless Steel vs. ISO-WD43150 Magnesium

EN 1.4903 stainless steel belongs to the iron alloys classification, while ISO-WD43150 magnesium belongs to the magnesium 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 EN 1.4903 stainless steel and the bottom bar is ISO-WD43150 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 20 to 21
2.8
Fatigue Strength, MPa 320 to 330
100
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
18
Shear Strength, MPa 420
140
Tensile Strength: Ultimate (UTS), MPa 670 to 680
250
Tensile Strength: Yield (Proof), MPa 500
150

Thermal Properties

Latent Heat of Fusion, J/g 270
350
Maximum Temperature: Mechanical, °C 650
95
Melting Completion (Liquidus), °C 1460
610
Melting Onset (Solidus), °C 1420
590
Specific Heat Capacity, J/kg-K 470
990
Thermal Conductivity, W/m-K 26
140
Thermal Expansion, µm/m-K 11
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
31
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
170

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
12
Density, g/cm3 7.8
1.7
Embodied Carbon, kg CO2/kg material 2.6
24
Embodied Energy, MJ/kg 36
160
Embodied Water, L/kg 88
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
6.1
Resilience: Unit (Modulus of Resilience), kJ/m3 650
250
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 24
41
Strength to Weight: Bending, points 22
52
Thermal Diffusivity, mm2/s 7.0
81
Thermal Shock Resistance, points 23
14

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.080 to 0.12
0
Chromium (Cr), % 8.0 to 9.5
0
Copper (Cu), % 0 to 0.3
0 to 0.050
Iron (Fe), % 87.1 to 90.5
0
Magnesium (Mg), % 0
97.5 to 98.8
Manganese (Mn), % 0.3 to 0.6
1.2 to 2.0
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0 to 0.010
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 0.1
Sulfur (S), % 0 to 0.015
0
Vanadium (V), % 0.18 to 0.25
0
Residuals, % 0
0 to 0.3