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AS41A Magnesium vs. S30615 Stainless Steel

AS41A magnesium belongs to the magnesium alloys classification, while S30615 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 S30615 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 11
39
Fatigue Strength, MPa 100
270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
75
Shear Strength, MPa 130
470
Tensile Strength: Ultimate (UTS), MPa 230
690
Tensile Strength: Yield (Proof), MPa 140
310

Thermal Properties

Latent Heat of Fusion, J/g 370
340
Maximum Temperature: Mechanical, °C 110
960
Melting Completion (Liquidus), °C 620
1370
Melting Onset (Solidus), °C 570
1320
Specific Heat Capacity, J/kg-K 1000
500
Thermal Conductivity, W/m-K 68
14
Thermal Expansion, µm/m-K 26
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
19
Density, g/cm3 1.6
7.6
Embodied Carbon, kg CO2/kg material 23
3.7
Embodied Energy, MJ/kg 160
53
Embodied Water, L/kg 980
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
220
Resilience: Unit (Modulus of Resilience), kJ/m3 220
260
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
25
Strength to Weight: Bending, points 50
23
Thermal Diffusivity, mm2/s 41
3.7
Thermal Shock Resistance, points 14
16

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0.8 to 1.5
Carbon (C), % 0
0.16 to 0.24
Chromium (Cr), % 0
17 to 19.5
Copper (Cu), % 0 to 0.060
0
Iron (Fe), % 0
56.7 to 65.3
Magnesium (Mg), % 92.8 to 95.8
0
Manganese (Mn), % 0.2 to 0.5
0 to 2.0
Nickel (Ni), % 0 to 0.030
13.5 to 16
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.5 to 1.5
3.2 to 4.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.12
0