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S66286 Stainless Steel vs. Type 3 Niobium

S66286 stainless steel belongs to the iron alloys classification, while Type 3 niobium belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is S66286 stainless steel and the bottom bar is Type 3 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
100
Elongation at Break, % 17 to 40
23
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 75
38
Tensile Strength: Ultimate (UTS), MPa 620 to 1020
220
Tensile Strength: Yield (Proof), MPa 280 to 670
140

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 15
42
Thermal Expansion, µm/m-K 17
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.6
Embodied Water, L/kg 170
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 200
44
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 1150
93
Stiffness to Weight: Axial, points 14
6.8
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 22 to 36
7.2
Strength to Weight: Bending, points 20 to 28
9.5
Thermal Diffusivity, mm2/s 4.0
18
Thermal Shock Resistance, points 13 to 22
21

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Boron (B), % 0.0010 to 0.010
0
Carbon (C), % 0 to 0.080
0 to 0.010
Chromium (Cr), % 13.5 to 16
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 49.1 to 59.5
0 to 0.0050
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 1.0 to 1.5
0 to 0.010
Nickel (Ni), % 24 to 27
0 to 0.0050
Niobium (Nb), % 0
98.6 to 99.2
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.0050
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0
0 to 0.1
Titanium (Ti), % 1.9 to 2.4
0 to 0.020
Tungsten (W), % 0
0 to 0.030
Vanadium (V), % 0.1 to 0.5
0
Zirconium (Zr), % 0
0.8 to 1.2