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AISI 440B Stainless Steel vs. AM100A Magnesium

AISI 440B stainless steel belongs to the iron alloys classification, while AM100A magnesium belongs to the magnesium alloys. There are 29 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 440B stainless steel and the bottom bar is AM100A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 3.0 to 18
1.0 to 6.8
Fatigue Strength, MPa 260 to 850
48 to 70
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
18
Shear Strength, MPa 460 to 1110
90 to 150
Tensile Strength: Ultimate (UTS), MPa 740 to 1930
160 to 270
Tensile Strength: Yield (Proof), MPa 430 to 1860
78 to 140

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Maximum Temperature: Mechanical, °C 870
140
Melting Completion (Liquidus), °C 1480
590
Melting Onset (Solidus), °C 1370
460
Specific Heat Capacity, J/kg-K 480
990
Thermal Conductivity, W/m-K 23
73
Thermal Expansion, µm/m-K 10
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
11
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
59

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
12
Density, g/cm3 7.7
1.7
Embodied Carbon, kg CO2/kg material 2.2
22
Embodied Energy, MJ/kg 31
160
Embodied Water, L/kg 120
1000

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57 to 110
1.3 to 15
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
70
Strength to Weight: Axial, points 27 to 70
25 to 44
Strength to Weight: Bending, points 24 to 45
38 to 54
Thermal Diffusivity, mm2/s 6.1
43
Thermal Shock Resistance, points 27 to 70
9.7 to 17

Alloy Composition

Aluminum (Al), % 0
9.3 to 10.7
Carbon (C), % 0.75 to 1.0
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 78.2 to 83.3
0
Magnesium (Mg), % 0
87.9 to 90.6
Manganese (Mn), % 0 to 1.0
0.1 to 0.35
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.015
0
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.3