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AZ61A Magnesium vs. S41045 Stainless Steel

AZ61A magnesium belongs to the magnesium alloys classification, while S41045 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 AZ61A magnesium and the bottom bar is S41045 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 11
25
Fatigue Strength, MPa 130
160
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
76
Shear Strength, MPa 150
280
Tensile Strength: Ultimate (UTS), MPa 280
430
Tensile Strength: Yield (Proof), MPa 170
230

Thermal Properties

Latent Heat of Fusion, J/g 350
270
Maximum Temperature: Mechanical, °C 120
740
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 530
1400
Specific Heat Capacity, J/kg-K 990
480
Thermal Conductivity, W/m-K 79
29
Thermal Expansion, µm/m-K 27
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 62
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
8.5
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
2.2
Embodied Energy, MJ/kg 160
31
Embodied Water, L/kg 980
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
92
Resilience: Unit (Modulus of Resilience), kJ/m3 310
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 46
16
Strength to Weight: Bending, points 56
16
Thermal Diffusivity, mm2/s 47
7.8
Thermal Shock Resistance, points 17
16

Alloy Composition


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Aluminum (Al), % 5.5 to 7.2
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
12 to 13
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
83.8 to 88
Magnesium (Mg), % 90.3 to 93.9
0
Manganese (Mn), % 0.15 to 0.5
0 to 1.0
Nickel (Ni), % 0 to 0.0050
0 to 0.5
Niobium (Nb), % 0
0 to 0.6
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.4 to 1.5
0
Residuals, % 0 to 0.3
0