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AZ91D Magnesium vs. N08535 Stainless Steel

AZ91D magnesium belongs to the magnesium alloys classification, while N08535 stainless steel belongs to the iron 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 AZ91D magnesium and the bottom bar is N08535 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 2.3 to 4.5
46
Fatigue Strength, MPa 74 to 85
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
80
Shear Strength, MPa 120 to 140
400
Tensile Strength: Ultimate (UTS), MPa 160 to 220
570
Tensile Strength: Yield (Proof), MPa 80 to 130
240

Thermal Properties

Latent Heat of Fusion, J/g 350
310
Maximum Temperature: Mechanical, °C 130
1100
Melting Completion (Liquidus), °C 600
1420
Melting Onset (Solidus), °C 490
1370
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 78
13
Thermal Expansion, µm/m-K 27
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 58
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
36
Density, g/cm3 1.7
8.1
Embodied Carbon, kg CO2/kg material 22
6.3
Embodied Energy, MJ/kg 160
87
Embodied Water, L/kg 990
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
210
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 26 to 34
20
Strength to Weight: Bending, points 38 to 46
19
Thermal Diffusivity, mm2/s 45
3.3
Thermal Shock Resistance, points 9.5 to 13
13

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
24 to 27
Copper (Cu), % 0 to 0.030
0 to 1.5
Iron (Fe), % 0 to 0.0050
29.4 to 44.5
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
2.5 to 4.0
Nickel (Ni), % 0 to 0.0020
29 to 36.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.1
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0