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SAE-AISI 1151 Steel vs. ZE41A Magnesium

SAE-AISI 1151 steel belongs to the iron alloys classification, while ZE41A magnesium belongs to the magnesium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, 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 SAE-AISI 1151 steel and the bottom bar is ZE41A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 220
63
Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 11 to 17
3.3
Fatigue Strength, MPa 260 to 410
98
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
18
Shear Strength, MPa 430 to 480
150
Tensile Strength: Ultimate (UTS), MPa 710 to 800
210
Tensile Strength: Yield (Proof), MPa 390 to 660
140

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Maximum Temperature: Mechanical, °C 400
150
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
540
Specific Heat Capacity, J/kg-K 470
970
Thermal Conductivity, W/m-K 51
110
Thermal Expansion, µm/m-K 12
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
27
Electrical Conductivity: Equal Weight (Specific), % IACS 12
130

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
18
Density, g/cm3 7.8
1.9
Embodied Carbon, kg CO2/kg material 1.4
24
Embodied Energy, MJ/kg 18
170
Embodied Water, L/kg 46
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 100
6.1
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1170
220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
63
Strength to Weight: Axial, points 25 to 28
31
Strength to Weight: Bending, points 22 to 24
41
Thermal Diffusivity, mm2/s 14
59
Thermal Shock Resistance, points 22 to 25
12

Alloy Composition

Carbon (C), % 0.48 to 0.55
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 98.3 to 98.7
0
Magnesium (Mg), % 0
91.7 to 95.4
Manganese (Mn), % 0.7 to 1.0
0 to 0.15
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Sulfur (S), % 0.080 to 0.13
0
Unspecified Rare Earths, % 0
0.75 to 1.8
Zinc (Zn), % 0
3.5 to 5.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3