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AISI 201LN Stainless Steel vs. AZ91B Magnesium

AISI 201LN stainless steel belongs to the iron alloys classification, while AZ91B magnesium belongs to the magnesium alloys. There are 31 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 AISI 201LN stainless steel and the bottom bar is AZ91B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 320
63
Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 25 to 51
5.0
Fatigue Strength, MPa 340 to 540
79
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
18
Shear Strength, MPa 530 to 680
140
Tensile Strength: Ultimate (UTS), MPa 740 to 1060
240
Tensile Strength: Yield (Proof), MPa 350 to 770
160

Thermal Properties

Latent Heat of Fusion, J/g 280
360
Maximum Temperature: Mechanical, °C 880
130
Melting Completion (Liquidus), °C 1410
600
Melting Onset (Solidus), °C 1370
470
Specific Heat Capacity, J/kg-K 480
990
Thermal Conductivity, W/m-K 15
73
Thermal Expansion, µm/m-K 17
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
11
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
58

Otherwise Unclassified Properties

Base Metal Price, % relative 12
12
Density, g/cm3 7.7
1.7
Embodied Carbon, kg CO2/kg material 2.6
22
Embodied Energy, MJ/kg 38
160
Embodied Water, L/kg 140
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230 to 310
11
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 1520
280
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
69
Strength to Weight: Axial, points 27 to 38
38
Strength to Weight: Bending, points 24 to 30
49
Thermal Diffusivity, mm2/s 4.0
42
Thermal Shock Resistance, points 16 to 23
14

Alloy Composition

Aluminum (Al), % 0
8.3 to 9.7
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 16 to 17.5
0
Copper (Cu), % 0 to 1.0
0 to 0.35
Iron (Fe), % 67.9 to 73.5
0
Magnesium (Mg), % 0
87.9 to 91.2
Manganese (Mn), % 6.4 to 7.5
0.13 to 0.5
Nickel (Ni), % 4.0 to 5.0
0 to 0.030
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0 to 0.5
Sulfur (S), % 0 to 0.015
0
Zinc (Zn), % 0
0.35 to 1.0