Grade 705C Zirconium vs. AWS BCo-1

Grade 705C zirconium belongs to the otherwise unclassified metals classification, while AWS BCo-1 belongs to the cobalt alloys. There are 14 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is grade 705C zirconium and the bottom bar is AWS BCo-1.

Grade 705C Cast Zirconium AWS BCo-1 (R39001) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		98
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.34
Poisson's Ratio		0.3

Shear Modulus, GPa		36
Shear Modulus, GPa		78

Tensile Strength: Ultimate (UTS), MPa		540
Tensile Strength: Ultimate (UTS), MPa		700

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		420

Specific Heat Capacity, J/kg-K		270
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		5.7
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Density, g/cm³		6.7
Density, g/cm³		8.1

Embodied Water, L/kg		450
Embodied Water, L/kg		430

Common Calculations

Stiffness to Weight: Axial, points		8.1
Stiffness to Weight: Axial, points		14

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

Strength to Weight: Axial, points		22
Strength to Weight: Axial, points		24

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

Thermal Shock Resistance, points		69
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), %		0 to 0.1
Carbon (C), %		0.35 to 0.45

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

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

Hafnium (Hf), %		0 to 4.5
Hafnium (Hf), %		0

Hydrogen (H), %		0 to 0.0050
Hydrogen (H), %		0

Iron (Fe), %		0 to 0.3
Iron (Fe), %		0 to 1.0

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

Niobium (Nb), %		2.0 to 3.0
Niobium (Nb), %		0

Nitrogen (N), %		0 to 0.030
Nitrogen (N), %		0

Oxygen (O), %		0 to 0.3
Oxygen (O), %		0

Phosphorus (P), %		0 to 0.010
Phosphorus (P), %		0 to 0.020

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

Silicon (Si), %		0
Silicon (Si), %		7.5 to 8.5

Sulfur (S), %		0
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), %		91.9 to 98
Zirconium (Zr), %		0 to 0.050

Residuals, %		0
Residuals, %		0 to 0.5