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AS41B Magnesium vs. EN 1.7703 Steel

AS41B magnesium belongs to the magnesium alloys classification, while EN 1.7703 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 AS41B magnesium and the bottom bar is EN 1.7703 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 6.0
20
Fatigue Strength, MPa 97
320 to 340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
74
Shear Strength, MPa 120
420 to 430
Tensile Strength: Ultimate (UTS), MPa 210
670 to 690
Tensile Strength: Yield (Proof), MPa 140
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Maximum Temperature: Mechanical, °C 110
460
Melting Completion (Liquidus), °C 620
1470
Melting Onset (Solidus), °C 570
1430
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 68
39
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 92
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
4.2
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 23
2.5
Embodied Energy, MJ/kg 160
35
Embodied Water, L/kg 980
61

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 220
570 to 650
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 35
24
Strength to Weight: Bending, points 47
22
Thermal Diffusivity, mm2/s 41
11
Thermal Shock Resistance, points 13
19 to 20

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0.11 to 0.15
Chromium (Cr), % 0
2.0 to 2.5
Copper (Cu), % 0 to 0.020
0 to 0.2
Iron (Fe), % 0 to 0.0035
94.6 to 96.4
Magnesium (Mg), % 92.7 to 95.7
0
Manganese (Mn), % 0.35 to 0.7
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0 to 0.0020
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0.5 to 1.5
0 to 0.1
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0.25 to 0.35
Zinc (Zn), % 0 to 0.12
0