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AISI 201 Stainless Steel vs. AZ31C Magnesium

AISI 201 stainless steel belongs to the iron alloys classification, while AZ31C 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 AISI 201 stainless steel and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 4.6 to 51
12
Fatigue Strength, MPa 280 to 600
150
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
17
Shear Strength, MPa 450 to 840
130
Tensile Strength: Ultimate (UTS), MPa 650 to 1450
260
Tensile Strength: Yield (Proof), MPa 300 to 1080
200

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Maximum Temperature: Mechanical, °C 880
110
Melting Completion (Liquidus), °C 1410
600
Melting Onset (Solidus), °C 1370
550
Specific Heat Capacity, J/kg-K 480
990
Thermal Conductivity, W/m-K 15
130
Thermal Expansion, µm/m-K 17
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
19
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
98

Otherwise Unclassified Properties

Base Metal Price, % relative 12
12
Density, g/cm3 7.7
1.7
Embodied Carbon, kg CO2/kg material 2.6
23
Embodied Energy, MJ/kg 38
160
Embodied Water, L/kg 140
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 61 to 340
28
Resilience: Unit (Modulus of Resilience), kJ/m3 230 to 2970
440
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
70
Strength to Weight: Axial, points 23 to 52
42
Strength to Weight: Bending, points 22 to 37
53
Thermal Diffusivity, mm2/s 4.0
74
Thermal Shock Resistance, points 14 to 32
16

Alloy Composition

Aluminum (Al), % 0
2.4 to 3.6
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 67.5 to 75
0
Magnesium (Mg), % 0
93.4 to 97
Manganese (Mn), % 5.5 to 7.5
0.15 to 1.0
Nickel (Ni), % 3.5 to 5.5
0 to 0.030
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0.5 to 1.5
Residuals, % 0
0 to 0.3