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ISO-WD32350 Magnesium vs. SAE-AISI 1151 Steel

ISO-WD32350 magnesium belongs to the magnesium alloys classification, while SAE-AISI 1151 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 ISO-WD32350 magnesium and the bottom bar is SAE-AISI 1151 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 5.7 to 10
11 to 17
Fatigue Strength, MPa 120 to 130
260 to 410
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
72
Shear Strength, MPa 150 to 170
430 to 480
Tensile Strength: Ultimate (UTS), MPa 250 to 290
710 to 800
Tensile Strength: Yield (Proof), MPa 140 to 180
390 to 660

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 95
400
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 560
1420
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 130
51
Thermal Expansion, µm/m-K 25
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
10
Electrical Conductivity: Equal Weight (Specific), % IACS 130
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.8
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
1.4
Embodied Energy, MJ/kg 160
18
Embodied Water, L/kg 960
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 23
86 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 380
400 to 1170
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 68
24
Strength to Weight: Axial, points 39 to 46
25 to 28
Strength to Weight: Bending, points 50 to 55
22 to 24
Thermal Diffusivity, mm2/s 73
14
Thermal Shock Resistance, points 16 to 18
22 to 25

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Carbon (C), % 0
0.48 to 0.55
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.060
98.3 to 98.7
Magnesium (Mg), % 95.7 to 97.7
0
Manganese (Mn), % 0.6 to 1.3
0.7 to 1.0
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0
Sulfur (S), % 0
0.080 to 0.13
Zinc (Zn), % 1.8 to 2.3
0
Residuals, % 0 to 0.3
0