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AS41B Magnesium vs. AISI 430 Stainless Steel

AS41B magnesium belongs to the magnesium alloys classification, while AISI 430 stainless steel belongs to the iron alloys. There are 30 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 AS41B magnesium and the bottom bar is AISI 430 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 6.0
24
Fatigue Strength, MPa 97
180
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 120
320
Tensile Strength: Ultimate (UTS), MPa 210
500
Tensile Strength: Yield (Proof), MPa 140
260

Thermal Properties

Latent Heat of Fusion, J/g 370
280
Maximum Temperature: Mechanical, °C 110
870
Melting Completion (Liquidus), °C 620
1510
Melting Onset (Solidus), °C 570
1430
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 68
25
Thermal Expansion, µm/m-K 26
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 92
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
8.5
Density, g/cm3 1.7
7.7
Embodied Carbon, kg CO2/kg material 23
2.1
Embodied Energy, MJ/kg 160
30
Embodied Water, L/kg 980
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
100
Resilience: Unit (Modulus of Resilience), kJ/m3 220
170
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 35
18
Strength to Weight: Bending, points 47
18
Thermal Diffusivity, mm2/s 41
6.7
Thermal Shock Resistance, points 13
18

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 0 to 0.020
0
Iron (Fe), % 0 to 0.0035
79.1 to 84
Magnesium (Mg), % 92.7 to 95.7
0
Manganese (Mn), % 0.35 to 0.7
0 to 1.0
Nickel (Ni), % 0 to 0.0020
0 to 0.75
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