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R30006 Cobalt vs. EN 1.7213 Steel

R30006 cobalt belongs to the cobalt alloys classification, while EN 1.7213 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is EN 1.7213 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.28
0.29
Rockwell C Hardness 40
41 to 48
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 900
500 to 1550

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
44
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
8.4

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 7.8
1.5
Embodied Energy, MJ/kg 110
20
Embodied Water, L/kg 500
52

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 29
18 to 55
Strength to Weight: Bending, points 24
18 to 38
Thermal Diffusivity, mm2/s 3.9
12
Thermal Shock Resistance, points 26
15 to 45

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.22 to 0.29
Chromium (Cr), % 27 to 32
0.9 to 1.2
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
96.7 to 98.1
Manganese (Mn), % 0
0.6 to 0.9
Molybdenum (Mo), % 0 to 1.0
0.15 to 0.3
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 2.0
0 to 0.3
Sulfur (S), % 0
0.020 to 0.040
Tungsten (W), % 4.0 to 6.0
0