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ACI-ASTM CE8MN Steel vs. Type 4 Niobium

ACI-ASTM CE8MN steel belongs to the iron alloys classification, while Type 4 niobium belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CE8MN steel and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 29
23
Poisson's Ratio 0.27
0.4
Shear Modulus, GPa 80
38
Tensile Strength: Ultimate (UTS), MPa 750
220
Tensile Strength: Yield (Proof), MPa 500
140

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Specific Heat Capacity, J/kg-K 480
270
Thermal Conductivity, W/m-K 16
42
Thermal Expansion, µm/m-K 13
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.6
Embodied Water, L/kg 180
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
44
Resilience: Unit (Modulus of Resilience), kJ/m3 620
93
Stiffness to Weight: Axial, points 15
6.8
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 27
7.2
Strength to Weight: Bending, points 23
9.5
Thermal Diffusivity, mm2/s 4.2
18
Thermal Shock Resistance, points 21
21

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.010
Chromium (Cr), % 22.5 to 25.5
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 56 to 66.4
0 to 0.010
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 3.0 to 4.5
0 to 0.050
Nickel (Ni), % 8.0 to 11
0 to 0.0050
Niobium (Nb), % 0
98.1 to 99.2
Nitrogen (N), % 0.1 to 0.3
0 to 0.010
Oxygen (O), % 0
0 to 0.025
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.5
0 to 0.0050
Sulfur (S), % 0 to 0.040
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