AWS ERTi-7 vs. Commercially Pure Zirconium

AWS ERTi-7 belongs to the titanium alloys classification, while commercially pure zirconium belongs to the otherwise unclassified metals. There are 21 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 AWS ERTi-7 and the bottom bar is commercially pure zirconium.

AWS ERTi-7 Weld Metal Commercially Pure (Unalloyed, R60702) Zirconium

Metric UnitsUS Customary Units

Mechanical Properties

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

Elongation at Break, %		20
Elongation at Break, %		18

Fatigue Strength, MPa		190
Fatigue Strength, MPa		60

Poisson's Ratio		0.32
Poisson's Ratio		0.34

Shear Modulus, GPa		40
Shear Modulus, GPa		36

Tensile Strength: Ultimate (UTS), MPa		340
Tensile Strength: Ultimate (UTS), MPa		430

Tensile Strength: Yield (Proof), MPa		280
Tensile Strength: Yield (Proof), MPa		240

Thermal Properties

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

Specific Heat Capacity, J/kg-K		540
Specific Heat Capacity, J/kg-K		270

Thermal Conductivity, W/m-K		21
Thermal Conductivity, W/m-K		22

Thermal Expansion, µm/m-K		8.7
Thermal Expansion, µm/m-K		5.5

Otherwise Unclassified Properties

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

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		64
Resilience: Ultimate (Unit Rupture Work), MJ/m³		65

Resilience: Unit (Modulus of Resilience), kJ/m³		360
Resilience: Unit (Modulus of Resilience), kJ/m³		290

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

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

Strength to Weight: Axial, points		21
Strength to Weight: Axial, points		18

Strength to Weight: Bending, points		24
Strength to Weight: Bending, points		19

Thermal Diffusivity, mm²/s		8.8
Thermal Diffusivity, mm²/s		12

Thermal Shock Resistance, points		26
Thermal Shock Resistance, points		56

Alloy Composition

Carbon (C), %		0 to 0.030
Carbon (C), %		0 to 0.050

Chromium (Cr), %		0
Chromium (Cr), %		0 to 0.2

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

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

Iron (Fe), %		0 to 0.12
Iron (Fe), %		0 to 0.2

Nitrogen (N), %		0 to 0.015
Nitrogen (N), %		0 to 0.025

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

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

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

Zirconium (Zr), %		0
Zirconium (Zr), %		94.7 to 100