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AZ91A Magnesium vs. AISI 201L Stainless Steel

AZ91A magnesium belongs to the magnesium alloys classification, while AISI 201L stainless steel belongs to the iron 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 AZ91A magnesium and the bottom bar is AISI 201L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
190 to 320
Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 5.0
22 to 46
Fatigue Strength, MPa 99
270 to 530
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 140
520 to 660
Tensile Strength: Ultimate (UTS), MPa 240
740 to 1040
Tensile Strength: Yield (Proof), MPa 160
290 to 790

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 52
2.9

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
210 to 300
Resilience: Unit (Modulus of Resilience), kJ/m3 280
220 to 1570
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 38
27 to 37
Strength to Weight: Bending, points 49
24 to 30
Thermal Diffusivity, mm2/s 42
4.0
Thermal Shock Resistance, points 14
16 to 23

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
67.9 to 75
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
5.5 to 7.5
Nickel (Ni), % 0 to 0.030
3.5 to 5.5
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0