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AISI 414 Stainless Steel vs. R31233 Cobalt

AISI 414 stainless steel belongs to the iron alloys classification, while R31233 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AISI 414 stainless steel and the bottom bar is R31233 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 17
17
Fatigue Strength, MPa 430 to 480
220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
85
Tensile Strength: Ultimate (UTS), MPa 900 to 960
1020
Tensile Strength: Yield (Proof), MPa 700 to 790
420

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Melting Completion (Liquidus), °C 1440
1350
Melting Onset (Solidus), °C 1400
1330
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 25
12
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.6
Embodied Carbon, kg CO2/kg material 2.1
8.4
Embodied Energy, MJ/kg 29
110
Embodied Water, L/kg 100
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
140
Resilience: Unit (Modulus of Resilience), kJ/m3 1260 to 1590
410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 32 to 34
33
Strength to Weight: Bending, points 27 to 28
26
Thermal Diffusivity, mm2/s 6.7
3.2
Thermal Shock Resistance, points 33 to 35
25

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.15
0.020 to 0.1
Chromium (Cr), % 11.5 to 13.5
23.5 to 27.5
Cobalt (Co), % 0
44.7 to 63.3
Iron (Fe), % 81.8 to 87.3
1.0 to 5.0
Manganese (Mn), % 0 to 1.0
0.1 to 1.5
Molybdenum (Mo), % 0
4.0 to 6.0
Nickel (Ni), % 1.3 to 2.5
7.0 to 11
Nitrogen (N), % 0
0.030 to 0.12
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.050 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0
1.0 to 3.0