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S44635 Stainless Steel vs. Type 1 Niobium

S44635 stainless steel belongs to the iron alloys classification, while Type 1 niobium belongs to the otherwise unclassified metals. There are 21 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 S44635 stainless steel and the bottom bar is Type 1 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
79
Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 23
29
Poisson's Ratio 0.27
0.4
Shear Modulus, GPa 81
38
Tensile Strength: Ultimate (UTS), MPa 710
140
Tensile Strength: Yield (Proof), MPa 580
82

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 16
52
Thermal Expansion, µm/m-K 11
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.6
Embodied Water, L/kg 170
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
35
Resilience: Unit (Modulus of Resilience), kJ/m3 810
32
Stiffness to Weight: Axial, points 15
6.8
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 25
4.6
Strength to Weight: Bending, points 23
7.1
Thermal Diffusivity, mm2/s 4.4
23
Thermal Shock Resistance, points 23
13

Alloy Composition

Carbon (C), % 0 to 0.025
0 to 0.010
Chromium (Cr), % 24.5 to 26
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 61.5 to 68.5
0 to 0.0050
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 3.5 to 4.5
0 to 0.010
Nickel (Ni), % 3.5 to 4.5
0 to 0.0050
Niobium (Nb), % 0.2 to 0.8
99.7 to 100
Nitrogen (N), % 0 to 0.035
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.75
0 to 0.0050
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0
0 to 0.1
Titanium (Ti), % 0.2 to 0.8
0 to 0.020
Tungsten (W), % 0
0 to 0.030
Zirconium (Zr), % 0
0 to 0.020