MakeItFrom.com
Menu (ESC)

AZ91B Magnesium vs. AISI 422 Stainless Steel

AZ91B magnesium belongs to the magnesium alloys classification, while AISI 422 stainless steel belongs to the iron alloys. There are 31 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 AZ91B magnesium and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
260 to 330
Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 5.0
15 to 17
Fatigue Strength, MPa 79
410 to 500
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
76
Shear Strength, MPa 140
560 to 660
Tensile Strength: Ultimate (UTS), MPa 240
910 to 1080
Tensile Strength: Yield (Proof), MPa 160
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 360
270
Maximum Temperature: Mechanical, °C 130
650
Melting Completion (Liquidus), °C 600
1480
Melting Onset (Solidus), °C 470
1470
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 73
24
Thermal Expansion, µm/m-K 26
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 58
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
3.1
Embodied Energy, MJ/kg 160
44
Embodied Water, L/kg 990
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 280
1140 to 1910
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 38
32 to 38
Strength to Weight: Bending, points 49
26 to 30
Thermal Diffusivity, mm2/s 42
6.4
Thermal Shock Resistance, points 14
33 to 39

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0.2 to 0.25
Chromium (Cr), % 0
11 to 12.5
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 0
81.9 to 85.8
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0.5 to 1.0
Molybdenum (Mo), % 0
0.9 to 1.3
Nickel (Ni), % 0 to 0.030
0.5 to 1.0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3
Zinc (Zn), % 0.35 to 1.0
0