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S30415 Stainless Steel vs. Type 4 Niobium

S30415 stainless steel belongs to the iron alloys classification, while Type 4 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 S30415 stainless steel and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
120
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 45
23
Poisson's Ratio 0.28
0.4
Shear Modulus, GPa 77
38
Tensile Strength: Ultimate (UTS), MPa 670
220
Tensile Strength: Yield (Proof), MPa 330
140

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Specific Heat Capacity, J/kg-K 480
270
Thermal Conductivity, W/m-K 21
42
Thermal Expansion, µm/m-K 17
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.7
8.6
Embodied Water, L/kg 140
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
44
Resilience: Unit (Modulus of Resilience), kJ/m3 280
93
Stiffness to Weight: Axial, points 14
6.8
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 24
7.2
Strength to Weight: Bending, points 22
9.5
Thermal Diffusivity, mm2/s 5.6
18
Thermal Shock Resistance, points 15
21

Alloy Composition

Carbon (C), % 0.040 to 0.060
0 to 0.010
Cerium (Ce), % 0.030 to 0.080
0
Chromium (Cr), % 18 to 19
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 67.8 to 71.8
0 to 0.010
Manganese (Mn), % 0 to 0.8
0
Molybdenum (Mo), % 0
0 to 0.050
Nickel (Ni), % 9.0 to 10
0 to 0.0050
Niobium (Nb), % 0
98.1 to 99.2
Nitrogen (N), % 0.12 to 0.18
0 to 0.010
Oxygen (O), % 0
0 to 0.025
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 1.0 to 2.0
0 to 0.0050
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
0 to 0.020
Tungsten (W), % 0
0 to 0.050
Zirconium (Zr), % 0
0.8 to 1.2