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ASTM A204 Steel vs. Type 4 Niobium

ASTM A204 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 (10, in this case) are not shown.

For each property being compared, the top bar is ASTM A204 steel and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
120
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 18 to 22
23
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 73
38
Tensile Strength: Ultimate (UTS), MPa 520 to 590
220
Tensile Strength: Yield (Proof), MPa 290 to 330
140

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 52
42
Thermal Expansion, µm/m-K 13
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.6
Embodied Water, L/kg 47
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 95
44
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 290
93
Stiffness to Weight: Axial, points 13
6.8
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 18 to 21
7.2
Strength to Weight: Bending, points 18 to 20
9.5
Thermal Diffusivity, mm2/s 14
18
Thermal Shock Resistance, points 15 to 17
21