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R30021 Cobalt vs. EN 1.4913 Stainless Steel

R30021 cobalt belongs to the cobalt alloys classification, while EN 1.4913 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is EN 1.4913 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 9.0
14 to 22
Fatigue Strength, MPa 250
320 to 480
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
75
Tensile Strength: Ultimate (UTS), MPa 700
870 to 980
Tensile Strength: Yield (Proof), MPa 500
480 to 850

Thermal Properties

Latent Heat of Fusion, J/g 330
270
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1190
1410
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 15
24
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
3.3

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.9
Embodied Energy, MJ/kg 110
41
Embodied Water, L/kg 520
97

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 570
600 to 1860
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23
31 to 35
Strength to Weight: Bending, points 21
26 to 28
Thermal Diffusivity, mm2/s 3.8
6.5
Thermal Shock Resistance, points 21
31 to 34

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0 to 0.0015
Carbon (C), % 0.2 to 0.35
0.17 to 0.23
Chromium (Cr), % 26 to 29
10 to 11.5
Cobalt (Co), % 61.7 to 67.3
0
Iron (Fe), % 0 to 3.0
84.5 to 88.3
Manganese (Mn), % 0
0.4 to 0.9
Molybdenum (Mo), % 4.5 to 6.0
0.5 to 0.8
Nickel (Ni), % 2.0 to 3.0
0.2 to 0.6
Niobium (Nb), % 0
0.25 to 0.55
Nitrogen (N), % 0
0.050 to 0.1
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 1.5
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Vanadium (V), % 0
0.1 to 0.3