R30021 Cobalt vs. EN 1.8062 Steel

R30021 cobalt belongs to the cobalt alloys classification, while EN 1.8062 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is EN 1.8062 steel.

UNS R30021 Co-Cr-W Alloy EN 1.8062 (46SiCrMo6) Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		220
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.29
Poisson's Ratio		0.29

Shear Modulus, GPa		86
Shear Modulus, GPa		72

Tensile Strength: Ultimate (UTS), MPa		700
Tensile Strength: Ultimate (UTS), MPa		660 to 1910

Thermal Properties

Latent Heat of Fusion, J/g		330
Latent Heat of Fusion, J/g		270

Melting Completion (Liquidus), °C		1350
Melting Completion (Liquidus), °C		1440

Melting Onset (Solidus), °C		1190
Melting Onset (Solidus), °C		1400

Specific Heat Capacity, J/kg-K		450
Specific Heat Capacity, J/kg-K		480

Thermal Conductivity, W/m-K		15
Thermal Conductivity, W/m-K		43

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		1.9
Electrical Conductivity: Equal Volume, % IACS		7.4

Electrical Conductivity: Equal Weight (Specific), % IACS		2.1
Electrical Conductivity: Equal Weight (Specific), % IACS		8.6

Otherwise Unclassified Properties

Density, g/cm³		8.4
Density, g/cm³		7.7

Embodied Carbon, kg CO₂/kg material		8.0
Embodied Carbon, kg CO₂/kg material		1.5

Embodied Energy, MJ/kg		110
Embodied Energy, MJ/kg		20

Embodied Water, L/kg		520
Embodied Water, L/kg		49

Common Calculations

Stiffness to Weight: Axial, points		15
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		23
Strength to Weight: Axial, points		24 to 69

Strength to Weight: Bending, points		21
Strength to Weight: Bending, points		22 to 44

Thermal Diffusivity, mm²/s		3.8
Thermal Diffusivity, mm²/s		12

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		20 to 57

Alloy Composition

Carbon (C), %		0.2 to 0.35
Carbon (C), %		0.42 to 0.5

Chromium (Cr), %		26 to 29
Chromium (Cr), %		0.5 to 0.8

Cobalt (Co), %		61.7 to 67.3
Cobalt (Co), %		0

Iron (Fe), %		0 to 3.0
Iron (Fe), %		95.9 to 97.1

Manganese (Mn), %		0
Manganese (Mn), %		0.5 to 0.8

Molybdenum (Mo), %		4.5 to 6.0
Molybdenum (Mo), %		0.2 to 0.3

Nickel (Ni), %		2.0 to 3.0
Nickel (Ni), %		0

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.025

Silicon (Si), %		0 to 1.5
Silicon (Si), %		1.3 to 1.7

Sulfur (S), %		0
Sulfur (S), %		0 to 0.025