SAE-AISI H43 Steel vs. R30006 Cobalt

SAE-AISI H43 steel belongs to the iron alloys classification, while R30006 cobalt belongs to the cobalt alloys. There are 20 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 SAE-AISI H43 steel and the bottom bar is R30006 cobalt.

SAE-AISI H43 (T20843) Molybdenum Hot-Work Steel UNS R30006 Co-Cr-W Alloy

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.29
Poisson's Ratio		0.28

Shear Modulus, GPa		77
Shear Modulus, GPa		85

Tensile Strength: Ultimate (UTS), MPa		710 to 2140
Tensile Strength: Ultimate (UTS), MPa		900

Thermal Properties

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

Melting Completion (Liquidus), °C		1530
Melting Completion (Liquidus), °C		1400

Melting Onset (Solidus), °C		1480
Melting Onset (Solidus), °C		1290

Specific Heat Capacity, J/kg-K		460
Specific Heat Capacity, J/kg-K		450

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

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

Otherwise Unclassified Properties

Density, g/cm³		7.9
Density, g/cm³		8.6

Embodied Carbon, kg CO₂/kg material		8.2
Embodied Carbon, kg CO₂/kg material		7.8

Embodied Energy, MJ/kg		120
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		100
Embodied Water, L/kg		500

Common Calculations

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

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		25 to 75
Strength to Weight: Axial, points		29

Strength to Weight: Bending, points		22 to 46
Strength to Weight: Bending, points		24

Thermal Diffusivity, mm²/s		8.3
Thermal Diffusivity, mm²/s		3.9

Thermal Shock Resistance, points		21 to 62
Thermal Shock Resistance, points		26

Alloy Composition

Carbon (C), %		0.5 to 0.65
Carbon (C), %		0.9 to 1.4

Chromium (Cr), %		3.8 to 4.5
Chromium (Cr), %		27 to 32

Cobalt (Co), %		0
Cobalt (Co), %		48.6 to 68.1

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

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

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

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

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

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

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

Tungsten (W), %		0
Tungsten (W), %		4.0 to 6.0

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