Grade 704C Zirconium vs. Grade 705C Zirconium

Both grade 704C zirconium and grade 705C zirconium are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is grade 704C zirconium and the bottom bar is grade 705C zirconium.

Grade 704C Cast Zirconium Grade 705C Cast Zirconium

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness		210
Brinell Hardness		200

Elastic (Young's, Tensile) Modulus, GPa		97
Elastic (Young's, Tensile) Modulus, GPa		98

Elongation at Break, %		11
Elongation at Break, %		13

Poisson's Ratio		0.34
Poisson's Ratio		0.34

Rockwell B Hardness		85
Rockwell B Hardness		87

Shear Modulus, GPa		36
Shear Modulus, GPa		36

Tensile Strength: Ultimate (UTS), MPa		470
Tensile Strength: Ultimate (UTS), MPa		540

Tensile Strength: Yield (Proof), MPa		310
Tensile Strength: Yield (Proof), MPa		390

Thermal Properties

Latent Heat of Fusion, J/g		240
Latent Heat of Fusion, J/g		250

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

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

Thermal Expansion, µm/m-K		5.9
Thermal Expansion, µm/m-K		5.7

Otherwise Unclassified Properties

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

Embodied Water, L/kg		460
Embodied Water, L/kg		450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		48
Resilience: Ultimate (Unit Rupture Work), MJ/m³		66

Resilience: Unit (Modulus of Resilience), kJ/m³		490
Resilience: Unit (Modulus of Resilience), kJ/m³		790

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

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

Strength to Weight: Axial, points		20
Strength to Weight: Axial, points		22

Strength to Weight: Bending, points		20
Strength to Weight: Bending, points		22

Thermal Diffusivity, mm²/s		12
Thermal Diffusivity, mm²/s		9.9

Thermal Shock Resistance, points		58
Thermal Shock Resistance, points		69

Alloy Composition

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

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

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

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

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

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

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

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

Tin (Sn), %		1.0 to 2.0
Tin (Sn), %		0

Zirconium (Zr), %		92.9 to 99
Zirconium (Zr), %		91.9 to 98