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AS41A Magnesium vs. S15700 Stainless Steel

AS41A magnesium belongs to the magnesium alloys classification, while S15700 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 S15700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
1.1 to 29
Fatigue Strength, MPa 100
370 to 770
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
77
Shear Strength, MPa 130
770 to 1070
Tensile Strength: Ultimate (UTS), MPa 230
1180 to 1890
Tensile Strength: Yield (Proof), MPa 140
500 to 1770

Thermal Properties

Latent Heat of Fusion, J/g 370
290
Maximum Temperature: Mechanical, °C 110
870
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
16
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 92
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 1.6
7.8
Embodied Carbon, kg CO2/kg material 23
3.4
Embodied Energy, MJ/kg 160
47
Embodied Water, L/kg 980
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
17 to 270
Resilience: Unit (Modulus of Resilience), kJ/m3 220
640 to 4660
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
42 to 67
Strength to Weight: Bending, points 50
32 to 43
Thermal Diffusivity, mm2/s 41
4.2
Thermal Shock Resistance, points 14
39 to 63

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0.75 to 1.5
Carbon (C), % 0
0 to 0.090
Chromium (Cr), % 0
14 to 16
Copper (Cu), % 0 to 0.060
0
Iron (Fe), % 0
69.6 to 76.8
Magnesium (Mg), % 92.8 to 95.8
0
Manganese (Mn), % 0.2 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0 to 0.030
6.5 to 7.7
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