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AS41A Magnesium vs. S45000 Stainless Steel

AS41A magnesium belongs to the magnesium alloys classification, while S45000 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 AS41A magnesium and the bottom bar is S45000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
6.8 to 14
Fatigue Strength, MPa 100
330 to 650
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
76
Shear Strength, MPa 130
590 to 830
Tensile Strength: Ultimate (UTS), MPa 230
980 to 1410
Tensile Strength: Yield (Proof), MPa 140
580 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 370
280
Maximum Temperature: Mechanical, °C 110
840
Melting Completion (Liquidus), °C 620
1440
Melting Onset (Solidus), °C 570
1390
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 68
17
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 92
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
13
Density, g/cm3 1.6
7.8
Embodied Carbon, kg CO2/kg material 23
2.8
Embodied Energy, MJ/kg 160
39
Embodied Water, L/kg 980
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
94 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 220
850 to 4400
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
35 to 50
Strength to Weight: Bending, points 50
28 to 36
Thermal Diffusivity, mm2/s 41
4.5
Thermal Shock Resistance, points 14
33 to 47

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
14 to 16
Copper (Cu), % 0 to 0.060
1.3 to 1.8
Iron (Fe), % 0
72.1 to 79.3
Magnesium (Mg), % 92.8 to 95.8
0
Manganese (Mn), % 0.2 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
0.5 to 1.0
Nickel (Ni), % 0 to 0.030
5.0 to 7.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.5 to 1.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.12
0