K93603 Alloy vs. R30012 Cobalt

K93603 alloy belongs to the iron alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is K93603 alloy and the bottom bar is R30012 cobalt.

UNS K93603 Low Expansion Alloy UNS R30012 Co-Cr-W Alloy

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.3
Poisson's Ratio		0.28

Shear Modulus, GPa		72
Shear Modulus, GPa		86

Tensile Strength: Ultimate (UTS), MPa		490 to 810
Tensile Strength: Ultimate (UTS), MPa		830

Thermal Properties

Latent Heat of Fusion, J/g		270
Latent Heat of Fusion, J/g		320

Melting Completion (Liquidus), °C		1430
Melting Completion (Liquidus), °C		1470

Melting Onset (Solidus), °C		1380
Melting Onset (Solidus), °C		1280

Specific Heat Capacity, J/kg-K		460
Specific Heat Capacity, J/kg-K		440

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Density, g/cm³		8.2
Density, g/cm³		8.8

Embodied Carbon, kg CO₂/kg material		4.8
Embodied Carbon, kg CO₂/kg material		8.3

Embodied Energy, MJ/kg		66
Embodied Energy, MJ/kg		120

Embodied Water, L/kg		120
Embodied Water, L/kg		480

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		23
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		17 to 27
Strength to Weight: Axial, points		26

Strength to Weight: Bending, points		17 to 24
Strength to Weight: Bending, points		22

Thermal Shock Resistance, points		15 to 25
Thermal Shock Resistance, points		23

Alloy Composition

Aluminum (Al), %		0 to 0.1
Aluminum (Al), %		0

Carbon (C), %		0 to 0.050
Carbon (C), %		1.4 to 2.0

Chromium (Cr), %		0 to 0.25
Chromium (Cr), %		27 to 32

Cobalt (Co), %		0 to 0.5
Cobalt (Co), %		47.5 to 64.1

Iron (Fe), %		61.8 to 64
Iron (Fe), %		0 to 3.0

Magnesium (Mg), %		0 to 0.1
Magnesium (Mg), %		0

Manganese (Mn), %		0 to 0.6
Manganese (Mn), %		0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		0 to 1.0

Nickel (Ni), %		36
Nickel (Ni), %		0 to 3.0

Phosphorus (P), %		0 to 0.015
Phosphorus (P), %		0

Silicon (Si), %		0 to 0.4
Silicon (Si), %		0 to 2.0

Sulfur (S), %		0 to 0.015
Sulfur (S), %		0

Titanium (Ti), %		0 to 0.1
Titanium (Ti), %		0

Tungsten (W), %		0
Tungsten (W), %		7.5 to 9.5

Zirconium (Zr), %		0 to 0.1
Zirconium (Zr), %		0