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S35000 Stainless Steel vs. ZK51A Magnesium

S35000 stainless steel belongs to the iron alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 S35000 stainless steel and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 2.3 to 14
4.7
Fatigue Strength, MPa 380 to 520
62
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
18
Shear Strength, MPa 740 to 950
160
Tensile Strength: Ultimate (UTS), MPa 1300 to 1570
240
Tensile Strength: Yield (Proof), MPa 660 to 1160
150

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Maximum Temperature: Mechanical, °C 900
120
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1410
550
Specific Heat Capacity, J/kg-K 470
970
Thermal Conductivity, W/m-K 16
110
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
28
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
140

Otherwise Unclassified Properties

Base Metal Price, % relative 14
13
Density, g/cm3 7.8
1.8
Embodied Carbon, kg CO2/kg material 3.2
24
Embodied Energy, MJ/kg 44
160
Embodied Water, L/kg 130
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28 to 170
10
Resilience: Unit (Modulus of Resilience), kJ/m3 1070 to 3360
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
64
Strength to Weight: Axial, points 46 to 56
36
Strength to Weight: Bending, points 34 to 38
47
Thermal Diffusivity, mm2/s 4.4
61
Thermal Shock Resistance, points 42 to 51
15

Alloy Composition

Carbon (C), % 0.070 to 0.11
0
Chromium (Cr), % 16 to 17
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 72.7 to 76.9
0
Magnesium (Mg), % 0
93.1 to 95.9
Manganese (Mn), % 0.5 to 1.3
0
Molybdenum (Mo), % 2.5 to 3.2
0
Nickel (Ni), % 4.0 to 5.0
0 to 0.010
Nitrogen (N), % 0.070 to 0.13
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3