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EN-MC21320 Magnesium vs. SAE-AISI 1005 Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while SAE-AISI 1005 steel belongs to the iron alloys. 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 EN-MC21320 magnesium and the bottom bar is SAE-AISI 1005 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 68
95
Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 7.5
23
Fatigue Strength, MPa 95
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
73
Shear Strength, MPa 130
210
Tensile Strength: Ultimate (UTS), MPa 230
330
Tensile Strength: Yield (Proof), MPa 140
260

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Maximum Temperature: Mechanical, °C 110
400
Melting Completion (Liquidus), °C 600
1470
Melting Onset (Solidus), °C 530
1430
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 66
53
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 91
7.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.8
Density, g/cm3 1.6
7.9
Embodied Carbon, kg CO2/kg material 23
1.4
Embodied Energy, MJ/kg 160
18
Embodied Water, L/kg 980
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
70
Resilience: Unit (Modulus of Resilience), kJ/m3 200
180
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 38
12
Strength to Weight: Bending, points 50
13
Thermal Diffusivity, mm2/s 40
14
Thermal Shock Resistance, points 13
10

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0 to 0.060
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
99.5 to 100
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0 to 0.35
Nickel (Ni), % 0 to 0.0020
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.5 to 1.5
0
Sulfur (S), % 0
0 to 0.050
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0