MakeItFrom.com
Menu (ESC)

AISI 422 Stainless Steel vs. R31539 Cobalt

AISI 422 stainless steel belongs to the iron alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 29 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 422 stainless steel and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 15 to 17
13 to 22
Fatigue Strength, MPa 410 to 500
310 to 480
Poisson's Ratio 0.28
0.29
Reduction in Area, % 34 to 40
13 to 23
Rockwell C Hardness 21
25 to 35
Shear Modulus, GPa 76
86
Tensile Strength: Ultimate (UTS), MPa 910 to 1080
1000 to 1340
Tensile Strength: Yield (Proof), MPa 670 to 870
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1480
1360
Melting Onset (Solidus), °C 1470
1290
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 24
13
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.7
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 5.3
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 3.1
8.2
Embodied Energy, MJ/kg 44
110
Embodied Water, L/kg 100
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 1140 to 1910
780 to 2000
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 38
33 to 44
Strength to Weight: Bending, points 26 to 30
27 to 32
Thermal Diffusivity, mm2/s 6.4
3.5
Thermal Shock Resistance, points 33 to 39
24 to 32

Alloy Composition

Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0.2 to 0.25
0 to 0.14
Chromium (Cr), % 11 to 12.5
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Iron (Fe), % 81.9 to 85.8
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 0.5 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.3
5.0 to 7.0
Nickel (Ni), % 0.5 to 1.0
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0
Tungsten (W), % 0.9 to 1.3
0
Vanadium (V), % 0.2 to 0.3
0