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AS41B Magnesium vs. ASTM A514 Steel

AS41B magnesium belongs to the magnesium alloys classification, while ASTM A514 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 ASTM A514 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 6.0
18 to 21
Fatigue Strength, MPa 97
470 to 540
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
73
Shear Strength, MPa 120
490 to 520
Tensile Strength: Ultimate (UTS), MPa 210
790 to 830
Tensile Strength: Yield (Proof), MPa 140
690 to 770

Thermal Properties

Latent Heat of Fusion, J/g 370
250 to 260
Maximum Temperature: Mechanical, °C 110
400 to 440
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 570
1420
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 68
37 to 51
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
7.2 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 92
8.3 to 8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 12
2.3 to 3.8
Density, g/cm3 1.7
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 23
1.6 to 1.8
Embodied Energy, MJ/kg 160
21 to 25
Embodied Water, L/kg 980
48 to 57

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
140 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 220
1280 to 1590
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 35
28 to 29
Strength to Weight: Bending, points 47
24 to 25
Thermal Diffusivity, mm2/s 41
10 to 14
Thermal Shock Resistance, points 13
23 to 24