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AISI 204 Stainless Steel vs. Type 4 Niobium

AISI 204 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 (12, in this case) are not shown.

For each property being compared, the top bar is AISI 204 stainless steel and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 330
120
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 23 to 39
23
Poisson's Ratio 0.28
0.4
Shear Modulus, GPa 77
38
Tensile Strength: Ultimate (UTS), MPa 730 to 1100
220
Tensile Strength: Yield (Proof), MPa 380 to 1080
140

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Specific Heat Capacity, J/kg-K 480
270
Thermal Conductivity, W/m-K 15
42
Thermal Expansion, µm/m-K 17
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.7
8.6
Embodied Water, L/kg 130
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240 to 250
44
Resilience: Unit (Modulus of Resilience), kJ/m3 360 to 2940
93
Stiffness to Weight: Axial, points 14
6.8
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 27 to 40
7.2
Strength to Weight: Bending, points 24 to 31
9.5
Thermal Diffusivity, mm2/s 4.1
18
Thermal Shock Resistance, points 16 to 24
21

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.010
Chromium (Cr), % 15 to 17
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 69.6 to 76.4
0 to 0.010
Manganese (Mn), % 7.0 to 9.0
0
Molybdenum (Mo), % 0
0 to 0.050
Nickel (Ni), % 1.5 to 3.0
0 to 0.0050
Niobium (Nb), % 0
98.1 to 99.2
Nitrogen (N), % 0.15 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 1.0
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