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S17400 Stainless Steel vs. ZE41A Magnesium

S17400 stainless 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 (8, 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 S17400 stainless steel and the bottom bar is ZE41A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 440
63
Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 11 to 21
3.3
Fatigue Strength, MPa 380 to 670
98
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
18
Shear Strength, MPa 570 to 830
150
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
210
Tensile Strength: Yield (Proof), MPa 580 to 1250
140

Thermal Properties

Latent Heat of Fusion, J/g 280
330
Maximum Temperature: Mechanical, °C 850
150
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
540
Specific Heat Capacity, J/kg-K 480
970
Thermal Conductivity, W/m-K 17
110
Thermal Expansion, µm/m-K 11
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
130

Otherwise Unclassified Properties

Base Metal Price, % relative 14
18
Density, g/cm3 7.8
1.9
Embodied Carbon, kg CO2/kg material 2.7
24
Embodied Energy, MJ/kg 39
170
Embodied Water, L/kg 130
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
6.1
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
63
Strength to Weight: Axial, points 32 to 49
31
Strength to Weight: Bending, points 27 to 35
41
Thermal Diffusivity, mm2/s 4.5
59
Thermal Shock Resistance, points 30 to 46
12

Alloy Composition

Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 3.0 to 5.0
0 to 0.1
Iron (Fe), % 70.4 to 78.9
0
Magnesium (Mg), % 0
91.7 to 95.4
Manganese (Mn), % 0 to 1.0
0 to 0.15
Nickel (Ni), % 3.0 to 5.0
0 to 0.010
Niobium (Nb), % 0.15 to 0.45
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
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