Grade 705C Zirconium vs. AWS ERTi-7

Grade 705C zirconium belongs to the otherwise unclassified metals classification, while AWS ERTi-7 belongs to the titanium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is grade 705C zirconium and the bottom bar is AWS ERTi-7.

Grade 705C Cast Zirconium AWS ERTi-7 Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		98
Elastic (Young's, Tensile) Modulus, GPa		110

Elongation at Break, %		13
Elongation at Break, %		20

Poisson's Ratio		0.34
Poisson's Ratio		0.32

Shear Modulus, GPa		36
Shear Modulus, GPa		40

Tensile Strength: Ultimate (UTS), MPa		540
Tensile Strength: Ultimate (UTS), MPa		340

Tensile Strength: Yield (Proof), MPa		390
Tensile Strength: Yield (Proof), MPa		280

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		540

Thermal Conductivity, W/m-K		18
Thermal Conductivity, W/m-K		21

Thermal Expansion, µm/m-K		5.7
Thermal Expansion, µm/m-K		8.7

Otherwise Unclassified Properties

Density, g/cm³		6.7
Density, g/cm³		4.5

Embodied Water, L/kg		450
Embodied Water, L/kg		470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		66
Resilience: Ultimate (Unit Rupture Work), MJ/m³		64

Resilience: Unit (Modulus of Resilience), kJ/m³		790
Resilience: Unit (Modulus of Resilience), kJ/m³		360

Stiffness to Weight: Axial, points		8.1
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		23
Stiffness to Weight: Bending, points		35

Strength to Weight: Axial, points		22
Strength to Weight: Axial, points		21

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

Thermal Diffusivity, mm²/s		9.9
Thermal Diffusivity, mm²/s		8.8

Thermal Shock Resistance, points		69
Thermal Shock Resistance, points		26

Alloy Composition

Carbon (C), %		0 to 0.1
Carbon (C), %		0 to 0.030

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

Hydrogen (H), %		0 to 0.0050
Hydrogen (H), %		0 to 0.0080

Iron (Fe), %		0 to 0.3
Iron (Fe), %		0 to 0.12

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

Nitrogen (N), %		0 to 0.030
Nitrogen (N), %		0 to 0.015

Oxygen (O), %		0 to 0.3
Oxygen (O), %		0.080 to 0.16

Palladium (Pd), %		0
Palladium (Pd), %		0.12 to 0.25

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

Titanium (Ti), %		0
Titanium (Ti), %		99.417 to 99.8

Zirconium (Zr), %		91.9 to 98
Zirconium (Zr), %		0