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Type 3 Niobium vs. SAE-AISI H25 Steel

Type 3 niobium belongs to the otherwise unclassified metals classification, while SAE-AISI H25 steel belongs to the iron alloys. There are 16 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is Type 3 niobium and the bottom bar is SAE-AISI H25 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Poisson's Ratio 0.4
0.29
Shear Modulus, GPa 38
79
Tensile Strength: Ultimate (UTS), MPa 220
710 to 1620

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Specific Heat Capacity, J/kg-K 270
420
Thermal Conductivity, W/m-K 42
26
Thermal Expansion, µm/m-K 7.3
12

Otherwise Unclassified Properties

Density, g/cm3 8.6
9.1
Embodied Water, L/kg 160
83

Common Calculations

Stiffness to Weight: Axial, points 6.8
12
Stiffness to Weight: Bending, points 18
22
Strength to Weight: Axial, points 7.2
22 to 50
Strength to Weight: Bending, points 9.5
20 to 34
Thermal Diffusivity, mm2/s 18
6.7
Thermal Shock Resistance, points 21
22 to 49

Alloy Composition

Carbon (C), % 0 to 0.010
0.22 to 0.32
Chromium (Cr), % 0
3.8 to 4.5
Copper (Cu), % 0
0 to 0.25
Hafnium (Hf), % 0 to 0.020
0
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.0050
77.2 to 81.3
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0 to 0.010
0
Nickel (Ni), % 0 to 0.0050
0 to 0.3
Niobium (Nb), % 98.6 to 99.2
0
Nitrogen (N), % 0 to 0.010
0
Oxygen (O), % 0 to 0.015
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.0050
0.15 to 0.4
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0 to 0.1
0
Titanium (Ti), % 0 to 0.020
0
Tungsten (W), % 0 to 0.030
14 to 16
Vanadium (V), % 0
0.4 to 0.6
Zirconium (Zr), % 0.8 to 1.2
0