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Commercially Pure Zirconium vs. SAE-AISI 8645 Steel

Commercially pure zirconium belongs to the otherwise unclassified metals classification, while SAE-AISI 8645 steel belongs to the iron alloys. There are 21 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 commercially pure zirconium and the bottom bar is SAE-AISI 8645 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 98
190
Elongation at Break, % 18
12 to 23
Fatigue Strength, MPa 60
280 to 350
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 36
73
Tensile Strength: Ultimate (UTS), MPa 430
600 to 670
Tensile Strength: Yield (Proof), MPa 240
390 to 560

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Specific Heat Capacity, J/kg-K 270
470
Thermal Conductivity, W/m-K 22
39
Thermal Expansion, µm/m-K 5.5
13

Otherwise Unclassified Properties

Density, g/cm3 6.7
7.8
Embodied Water, L/kg 450
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65
77 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 290
420 to 840
Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 18
21 to 24
Strength to Weight: Bending, points 19
20 to 22
Thermal Diffusivity, mm2/s 12
10
Thermal Shock Resistance, points 56
18 to 20

Alloy Composition

Carbon (C), % 0 to 0.050
0.43 to 0.48
Chromium (Cr), % 0 to 0.2
0.4 to 0.6
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.2
96.5 to 97.7
Manganese (Mn), % 0
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0
0.4 to 0.7
Nitrogen (N), % 0 to 0.025
0
Oxygen (O), % 0 to 0.16
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Zirconium (Zr), % 94.7 to 100
0