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AZ61A Magnesium vs. S35115 Stainless Steel

AZ61A magnesium belongs to the magnesium alloys classification, while S35115 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 S35115 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
46
Fatigue Strength, MPa 130
280
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
79
Shear Strength, MPa 150
470
Tensile Strength: Ultimate (UTS), MPa 280
670
Tensile Strength: Yield (Proof), MPa 170
310

Thermal Properties

Latent Heat of Fusion, J/g 350
310
Maximum Temperature: Mechanical, °C 120
1100
Melting Completion (Liquidus), °C 600
1420
Melting Onset (Solidus), °C 530
1370
Specific Heat Capacity, J/kg-K 990
480
Thermal Conductivity, W/m-K 79
15
Thermal Expansion, µm/m-K 27
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 62
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
26
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 23
4.8
Embodied Energy, MJ/kg 160
67
Embodied Water, L/kg 980
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
250
Resilience: Unit (Modulus of Resilience), kJ/m3 310
240
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 46
24
Strength to Weight: Bending, points 56
22
Thermal Diffusivity, mm2/s 47
3.9
Thermal Shock Resistance, points 17
15

Alloy Composition


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Aluminum (Al), % 5.5 to 7.2
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
23 to 25
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
47.6 to 55.8
Magnesium (Mg), % 90.3 to 93.9
0
Manganese (Mn), % 0.15 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
1.5 to 2.5
Nickel (Ni), % 0 to 0.0050
19 to 22
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.1
0.5 to 1.5
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0.4 to 1.5
0
Residuals, % 0 to 0.3
0