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AS41A Magnesium vs. S44627 Stainless Steel

AS41A magnesium belongs to the magnesium alloys classification, while S44627 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 S44627 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
24
Fatigue Strength, MPa 100
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 17
80
Shear Strength, MPa 130
310
Tensile Strength: Ultimate (UTS), MPa 230
490
Tensile Strength: Yield (Proof), MPa 140
300

Thermal Properties

Latent Heat of Fusion, J/g 370
290
Maximum Temperature: Mechanical, °C 110
1100
Melting Completion (Liquidus), °C 620
1440
Melting Onset (Solidus), °C 570
1400
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
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 12
14
Density, g/cm3 1.6
7.7
Embodied Carbon, kg CO2/kg material 23
2.9
Embodied Energy, MJ/kg 160
41
Embodied Water, L/kg 980
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
100
Resilience: Unit (Modulus of Resilience), kJ/m3 220
220
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
18
Strength to Weight: Bending, points 50
18
Thermal Diffusivity, mm2/s 41
4.6
Thermal Shock Resistance, points 14
16

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0
25 to 27.5
Copper (Cu), % 0 to 0.060
0 to 0.2
Iron (Fe), % 0
69.2 to 74.2
Magnesium (Mg), % 92.8 to 95.8
0
Manganese (Mn), % 0.2 to 0.5
0 to 0.4
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 0 to 0.030
0 to 0.5
Niobium (Nb), % 0
0.050 to 0.2
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0.5 to 1.5
0 to 0.4
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 0 to 0.12
0