K93500 Alloy vs. R30001 Cobalt

K93500 alloy belongs to the iron alloys classification, while R30001 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is K93500 alloy and the bottom bar is R30001 cobalt.

UNS K93500 Low Expansion Alloy UNS R30001 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		620

Thermal Properties

Latent Heat of Fusion, J/g		270
Latent Heat of Fusion, J/g		310

Melting Completion (Liquidus), °C		1430
Melting Completion (Liquidus), °C		1530

Melting Onset (Solidus), °C		1380
Melting Onset (Solidus), °C		1260

Specific Heat Capacity, J/kg-K		460
Specific Heat Capacity, J/kg-K		430

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		11

Otherwise Unclassified Properties

Density, g/cm³		8.2
Density, g/cm³		9.0

Embodied Carbon, kg CO₂/kg material		4.7
Embodied Carbon, kg CO₂/kg material		8.9

Embodied Energy, MJ/kg		65
Embodied Energy, MJ/kg		130

Embodied Water, L/kg		130
Embodied Water, L/kg		460

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		22

Strength to Weight: Axial, points		17 to 27
Strength to Weight: Axial, points		19

Strength to Weight: Bending, points		17 to 23
Strength to Weight: Bending, points		18

Thermal Shock Resistance, points		15 to 25
Thermal Shock Resistance, points		19

Alloy Composition

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

Carbon (C), %		0 to 0.050
Carbon (C), %		2.0 to 3.0

Chromium (Cr), %		0 to 0.25
Chromium (Cr), %		28 to 32

Cobalt (Co), %		5.0
Cobalt (Co), %		43 to 59

Iron (Fe), %		61.4 to 63
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), %		32
Nickel (Ni), %		0 to 3.0

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

Silicon (Si), %		0 to 0.25
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), %		11 to 13

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