R30001 Cobalt vs. SAE-AISI H43 Steel

R30001 cobalt belongs to the cobalt alloys classification, while SAE-AISI H43 steel belongs to the iron alloys. There are 20 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 R30001 cobalt and the bottom bar is SAE-AISI H43 steel.

UNS R30001 Co-Cr-W Alloy SAE-AISI H43 (T20843) Molybdenum Hot-Work Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		220
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		86
Shear Modulus, GPa		77

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		710 to 2140

Thermal Properties

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

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

Melting Onset (Solidus), °C		1260
Melting Onset (Solidus), °C		1480

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

Thermal Conductivity, W/m-K		15
Thermal Conductivity, W/m-K		30

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

Otherwise Unclassified Properties

Density, g/cm³		9.0
Density, g/cm³		7.9

Embodied Carbon, kg CO₂/kg material		8.9
Embodied Carbon, kg CO₂/kg material		8.2

Embodied Energy, MJ/kg		130
Embodied Energy, MJ/kg		120

Embodied Water, L/kg		460
Embodied Water, L/kg		100

Common Calculations

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

Stiffness to Weight: Bending, points		22
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		25 to 75

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		22 to 46

Thermal Diffusivity, mm²/s		3.7
Thermal Diffusivity, mm²/s		8.3

Thermal Shock Resistance, points		19
Thermal Shock Resistance, points		21 to 62

Alloy Composition

Carbon (C), %		2.0 to 3.0
Carbon (C), %		0.5 to 0.65

Chromium (Cr), %		28 to 32
Chromium (Cr), %		3.8 to 4.5

Cobalt (Co), %		43 to 59
Cobalt (Co), %		0

Iron (Fe), %		0 to 3.0
Iron (Fe), %		83.2 to 85.9

Manganese (Mn), %		0
Manganese (Mn), %		0.15 to 0.4

Molybdenum (Mo), %		0 to 1.0
Molybdenum (Mo), %		7.8 to 8.5

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

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		0 to 2.0
Silicon (Si), %		0.2 to 0.45

Sulfur (S), %		0
Sulfur (S), %		0 to 0.030

Tungsten (W), %		11 to 13
Tungsten (W), %		0

Vanadium (V), %		0
Vanadium (V), %		1.8 to 2.2