Grade 705C Zirconium vs. SAE-AISI P21 Steel

Grade 705C zirconium belongs to the otherwise unclassified metals classification, while SAE-AISI P21 steel belongs to the iron alloys. There are 16 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 grade 705C zirconium and the bottom bar is SAE-AISI P21 steel.

Grade 705C Cast Zirconium SAE-AISI P21 (T51621) Low-Carbon Mould Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		98
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.34
Poisson's Ratio		0.29

Shear Modulus, GPa		36
Shear Modulus, GPa		73

Tensile Strength: Ultimate (UTS), MPa		540
Tensile Strength: Ultimate (UTS), MPa		1130

Thermal Properties

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

Specific Heat Capacity, J/kg-K		270
Specific Heat Capacity, J/kg-K		470

Thermal Conductivity, W/m-K		18
Thermal Conductivity, W/m-K		41

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

Otherwise Unclassified Properties

Density, g/cm³		6.7
Density, g/cm³		7.9

Embodied Water, L/kg		450
Embodied Water, L/kg		62

Common Calculations

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

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

Strength to Weight: Axial, points		22
Strength to Weight: Axial, points		40

Strength to Weight: Bending, points		22
Strength to Weight: Bending, points		31

Thermal Diffusivity, mm²/s		9.9
Thermal Diffusivity, mm²/s		11

Thermal Shock Resistance, points		69
Thermal Shock Resistance, points		37

Alloy Composition

Carbon (C), %		0 to 0.1
Carbon (C), %		0.18 to 0.22

Chromium (Cr), %		0
Chromium (Cr), %		0 to 0.5

Cobalt (Co), %		0
Cobalt (Co), %		1.1 to 1.3

Copper (Cu), %		0
Copper (Cu), %		0 to 0.25

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), %		92.1 to 94.2

Manganese (Mn), %		0
Manganese (Mn), %		0.35 to 0.72

Nickel (Ni), %		0
Nickel (Ni), %		3.9 to 4.3

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 0.030

Silicon (Si), %		0
Silicon (Si), %		0.2 to 0.4

Sulfur (S), %		0
Sulfur (S), %		0 to 0.030

Vanadium (V), %		0
Vanadium (V), %		0.15 to 0.25

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