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SAE-AISI 1140 Steel vs. Type 1 Niobium

SAE-AISI 1140 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 (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1140 steel and the bottom bar is Type 1 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
79
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 14 to 18
29
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 72
38
Tensile Strength: Ultimate (UTS), MPa 600 to 700
140
Tensile Strength: Yield (Proof), MPa 340 to 570
82

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 51
52
Thermal Expansion, µm/m-K 13
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.6
Embodied Water, L/kg 46
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 93
35
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
32
Stiffness to Weight: Axial, points 13
6.8
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 21 to 25
4.6
Strength to Weight: Bending, points 20 to 22
7.1
Thermal Diffusivity, mm2/s 14
23
Thermal Shock Resistance, points 18 to 21
13

Alloy Composition

Carbon (C), % 0.37 to 0.44
0 to 0.010
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 98.4 to 98.9
0 to 0.0050
Manganese (Mn), % 0.7 to 1.0
0
Molybdenum (Mo), % 0
0 to 0.010
Nickel (Ni), % 0
0 to 0.0050
Niobium (Nb), % 0
99.7 to 100
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0 to 0.0050
Sulfur (S), % 0.080 to 0.13
0
Tantalum (Ta), % 0
0 to 0.1
Titanium (Ti), % 0
0 to 0.020
Tungsten (W), % 0
0 to 0.030
Zirconium (Zr), % 0
0 to 0.020