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S17700 Stainless Steel vs. WE54A Magnesium

S17700 stainless 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 (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 S17700 stainless steel and the bottom bar is WE54A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 430
85
Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 1.0 to 23
4.3 to 5.6
Fatigue Strength, MPa 290 to 560
98 to 130
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Shear Strength, MPa 740 to 940
150 to 170
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
270 to 300
Tensile Strength: Yield (Proof), MPa 430 to 1210
180

Thermal Properties

Latent Heat of Fusion, J/g 290
330
Maximum Temperature: Mechanical, °C 890
170
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
570
Specific Heat Capacity, J/kg-K 480
960
Thermal Conductivity, W/m-K 15
52
Thermal Expansion, µm/m-K 11
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
10
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
47

Otherwise Unclassified Properties

Base Metal Price, % relative 13
34
Density, g/cm3 7.7
1.9
Embodied Carbon, kg CO2/kg material 2.8
29
Embodied Energy, MJ/kg 40
260
Embodied Water, L/kg 150
900

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
10 to 14
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
360 to 380
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
62
Strength to Weight: Axial, points 42 to 59
39 to 43
Strength to Weight: Bending, points 32 to 40
49 to 51
Thermal Diffusivity, mm2/s 4.1
28
Thermal Shock Resistance, points 39 to 54
18 to 19

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
0
Carbon (C), % 0 to 0.090
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
0 to 0.030
Iron (Fe), % 70.5 to 76.8
0 to 0.010
Lithium (Li), % 0
0 to 0.2
Magnesium (Mg), % 0
88.7 to 93.4
Manganese (Mn), % 0 to 1.0
0 to 0.030
Nickel (Ni), % 6.5 to 7.8
0 to 0.0050
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.010
Sulfur (S), % 0 to 0.030
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