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AISI 441 Stainless Steel vs. AS41B Magnesium

AISI 441 stainless steel belongs to the iron alloys classification, while AS41B magnesium belongs to the magnesium alloys. There are 30 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 441 stainless steel and the bottom bar is AS41B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 23
6.0
Fatigue Strength, MPa 180
97
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
18
Shear Strength, MPa 300
120
Tensile Strength: Ultimate (UTS), MPa 470
210
Tensile Strength: Yield (Proof), MPa 270
140

Thermal Properties

Latent Heat of Fusion, J/g 280
370
Maximum Temperature: Mechanical, °C 910
110
Melting Completion (Liquidus), °C 1440
620
Melting Onset (Solidus), °C 1400
570
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 23
68
Thermal Expansion, µm/m-K 10
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
17
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
92

Otherwise Unclassified Properties

Base Metal Price, % relative 13
12
Density, g/cm3 7.7
1.7
Embodied Carbon, kg CO2/kg material 2.8
23
Embodied Energy, MJ/kg 41
160
Embodied Water, L/kg 130
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
11
Resilience: Unit (Modulus of Resilience), kJ/m3 190
220
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
72
Strength to Weight: Axial, points 17
35
Strength to Weight: Bending, points 17
47
Thermal Diffusivity, mm2/s 6.1
41
Thermal Shock Resistance, points 16
13

Alloy Composition

Aluminum (Al), % 0
3.5 to 5.0
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17.5 to 19.5
0
Copper (Cu), % 0
0 to 0.020
Iron (Fe), % 76 to 82.2
0 to 0.0035
Magnesium (Mg), % 0
92.7 to 95.7
Manganese (Mn), % 0 to 1.0
0.35 to 0.7
Nickel (Ni), % 0 to 1.0
0 to 0.0020
Niobium (Nb), % 0.3 to 0.9
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.5 to 1.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0.1 to 0.5
0
Zinc (Zn), % 0
0 to 0.12