Grey Cast Iron vs. AWS BCo-1

Grey cast iron belongs to the iron alloys classification, while AWS BCo-1 belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is grey cast iron and the bottom bar is AWS BCo-1.

Grey Cast Iron AWS BCo-1 (R39001) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		180
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.29
Poisson's Ratio		0.3

Shear Modulus, GPa		69
Shear Modulus, GPa		78

Tensile Strength: Ultimate (UTS), MPa		160 to 450
Tensile Strength: Ultimate (UTS), MPa		700

Thermal Properties

Latent Heat of Fusion, J/g		280
Latent Heat of Fusion, J/g		420

Melting Completion (Liquidus), °C		1380
Melting Completion (Liquidus), °C		1150

Melting Onset (Solidus), °C		1180
Melting Onset (Solidus), °C		1120

Specific Heat Capacity, J/kg-K		490
Specific Heat Capacity, J/kg-K		480

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

Otherwise Unclassified Properties

Density, g/cm³		7.5
Density, g/cm³		8.1

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

Embodied Energy, MJ/kg		21
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		44
Embodied Water, L/kg		430

Common Calculations

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

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

Strength to Weight: Axial, points		5.8 to 17
Strength to Weight: Axial, points		24

Strength to Weight: Bending, points		8.7 to 17
Strength to Weight: Bending, points		22

Thermal Shock Resistance, points		6.0 to 17
Thermal Shock Resistance, points		21

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.050

Boron (B), %		0
Boron (B), %		0.7 to 0.9

Carbon (C), %		3.1 to 3.4
Carbon (C), %		0.35 to 0.45

Chromium (Cr), %		0
Chromium (Cr), %		18 to 20

Cobalt (Co), %		0
Cobalt (Co), %		46 to 54

Iron (Fe), %		92.1 to 93.9
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		0.5 to 0.7
Manganese (Mn), %		0

Nickel (Ni), %		0
Nickel (Ni), %		16 to 18

Phosphorus (P), %		0 to 0.9
Phosphorus (P), %		0 to 0.020

Selenium (Se), %		0
Selenium (Se), %		0 to 0.0050

Silicon (Si), %		2.5 to 2.8
Silicon (Si), %		7.5 to 8.5

Sulfur (S), %		0 to 0.15
Sulfur (S), %		0 to 0.020

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.050

Tungsten (W), %		0
Tungsten (W), %		3.5 to 4.5

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.050

Residuals, %		0
Residuals, %		0 to 0.5