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SAE-AISI 94B17 Steel vs. WE54A Magnesium

SAE-AISI 94B17 steel belongs to the iron alloys classification, while WE54A magnesium belongs to the magnesium alloys. There are 31 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 SAE-AISI 94B17 steel and the bottom bar is WE54A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
85
Elastic (Young's, Tensile) Modulus, GPa 190
44
Elongation at Break, % 25
4.3 to 5.6
Fatigue Strength, MPa 200
98 to 130
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
17
Shear Strength, MPa 280
150 to 170
Tensile Strength: Ultimate (UTS), MPa 440
270 to 300
Tensile Strength: Yield (Proof), MPa 270
180

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Maximum Temperature: Mechanical, °C 410
170
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
570
Specific Heat Capacity, J/kg-K 470
960
Thermal Conductivity, W/m-K 39
52
Thermal Expansion, µm/m-K 13
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
10
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
47

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
34
Density, g/cm3 7.8
1.9
Embodied Carbon, kg CO2/kg material 1.5
29
Embodied Energy, MJ/kg 20
260
Embodied Water, L/kg 49
900

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 96
10 to 14
Resilience: Unit (Modulus of Resilience), kJ/m3 200
360 to 380
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
62
Strength to Weight: Axial, points 16
39 to 43
Strength to Weight: Bending, points 16
49 to 51
Thermal Diffusivity, mm2/s 10
28
Thermal Shock Resistance, points 13
18 to 19

Alloy Composition

Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.15 to 0.2
0
Chromium (Cr), % 0.3 to 0.5
0
Copper (Cu), % 0
0 to 0.030
Iron (Fe), % 97.1 to 98.3
0 to 0.010
Lithium (Li), % 0
0 to 0.2
Magnesium (Mg), % 0
88.7 to 93.4
Manganese (Mn), % 0.75 to 1.0
0 to 0.030
Molybdenum (Mo), % 0.080 to 0.15
0
Nickel (Ni), % 0.3 to 0.6
0 to 0.0050
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.010
Sulfur (S), % 0 to 0.040
0
Unspecified Rare Earths, % 0
1.5 to 4.0
Yttrium (Y), % 0
4.8 to 5.5
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3