Grade 704C Zirconium vs. SAE-AISI H21 Steel

Grade 704C zirconium belongs to the otherwise unclassified metals classification, while SAE-AISI H21 steel belongs to the iron alloys. There are 16 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is grade 704C zirconium and the bottom bar is SAE-AISI H21 steel.

Grade 704C Cast Zirconium SAE-AISI H21 (T20821) Tungsten Hot-Work Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		97
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.34
Poisson's Ratio		0.29

Shear Modulus, GPa		36
Shear Modulus, GPa		76

Tensile Strength: Ultimate (UTS), MPa		470
Tensile Strength: Ultimate (UTS), MPa		720 to 1790

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		440

Thermal Conductivity, W/m-K		21
Thermal Conductivity, W/m-K		27

Thermal Expansion, µm/m-K		5.9
Thermal Expansion, µm/m-K		11

Otherwise Unclassified Properties

Density, g/cm³		6.7
Density, g/cm³		8.5

Embodied Water, L/kg		460
Embodied Water, L/kg		72

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		23

Strength to Weight: Axial, points		20
Strength to Weight: Axial, points		23 to 58

Strength to Weight: Bending, points		20
Strength to Weight: Bending, points		21 to 38

Thermal Diffusivity, mm²/s		12
Thermal Diffusivity, mm²/s		7.1

Thermal Shock Resistance, points		58
Thermal Shock Resistance, points		24 to 59

Alloy Composition

Carbon (C), %		0 to 0.1
Carbon (C), %		0.28 to 0.36

Chromium (Cr), %		0
Chromium (Cr), %		3.0 to 3.8

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), %		87.6 to 93.8

Manganese (Mn), %		0
Manganese (Mn), %		0.15 to 0.4

Nickel (Ni), %		0
Nickel (Ni), %		0 to 0.3

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), %		0.15 to 0.5

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

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

Tungsten (W), %		0
Tungsten (W), %		8.5 to 10

Vanadium (V), %		0
Vanadium (V), %		0.3 to 0.6

Zirconium (Zr), %		92.9 to 99
Zirconium (Zr), %		0