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S35125 Stainless Steel vs. ZE63A Magnesium

S35125 stainless steel belongs to the iron alloys classification, while ZE63A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, 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 S35125 stainless steel and the bottom bar is ZE63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 39
7.7
Fatigue Strength, MPa 200
120
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
17
Shear Strength, MPa 370
170
Tensile Strength: Ultimate (UTS), MPa 540
300
Tensile Strength: Yield (Proof), MPa 230
190

Thermal Properties

Latent Heat of Fusion, J/g 300
330
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1430
510
Melting Onset (Solidus), °C 1380
390
Specific Heat Capacity, J/kg-K 470
950
Thermal Conductivity, W/m-K 12
110
Thermal Expansion, µm/m-K 16
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
31
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
140

Otherwise Unclassified Properties

Base Metal Price, % relative 36
22
Density, g/cm3 8.1
2.0
Embodied Carbon, kg CO2/kg material 6.4
24
Embodied Energy, MJ/kg 89
180
Embodied Water, L/kg 210
920

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
20
Resilience: Unit (Modulus of Resilience), kJ/m3 140
400
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 24
58
Strength to Weight: Axial, points 19
40
Strength to Weight: Bending, points 18
48
Thermal Diffusivity, mm2/s 3.1
57
Thermal Shock Resistance, points 12
17

Alloy Composition

Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 20 to 23
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 36.2 to 45.8
0
Magnesium (Mg), % 0
89.6 to 92
Manganese (Mn), % 1.0 to 1.5
0
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 31 to 35
0 to 0.010
Niobium (Nb), % 0.25 to 0.6
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.015
0
Unspecified Rare Earths, % 0
2.1 to 3.0
Zinc (Zn), % 0
5.5 to 6.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3