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EN 1.4031 Stainless Steel vs. M1A Magnesium

EN 1.4031 stainless steel belongs to the iron alloys classification, while M1A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 1.4031 stainless steel and the bottom bar is M1A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 11 to 13
5.5
Fatigue Strength, MPa 220 to 400
88
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
18
Shear Strength, MPa 400 to 540
120
Tensile Strength: Ultimate (UTS), MPa 670 to 900
230
Tensile Strength: Yield (Proof), MPa 390 to 730
130

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Maximum Temperature: Mechanical, °C 770
95
Melting Completion (Liquidus), °C 1440
610
Melting Onset (Solidus), °C 1400
580
Specific Heat Capacity, J/kg-K 480
990
Thermal Conductivity, W/m-K 30
150
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
35
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
190

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
12
Density, g/cm3 7.7
1.7
Embodied Carbon, kg CO2/kg material 1.9
24
Embodied Energy, MJ/kg 27
160
Embodied Water, L/kg 100
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 94
11
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1360
180
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 24 to 32
38
Strength to Weight: Bending, points 22 to 27
49
Thermal Diffusivity, mm2/s 8.1
88
Thermal Shock Resistance, points 23 to 32
13

Alloy Composition

Calcium (Ca), % 0
0 to 0.3
Carbon (C), % 0.36 to 0.42
0
Chromium (Cr), % 12.5 to 14.5
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 83 to 87.1
0
Magnesium (Mg), % 0
97.2 to 98.8
Manganese (Mn), % 0 to 1.0
1.2 to 2.0
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.015
0
Residuals, % 0
0 to 0.3