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ACI-ASTM CK20 Steel vs. Commercially Pure Zirconium

ACI-ASTM CK20 steel belongs to the iron 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 (11, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CK20 steel and the bottom bar is commercially pure zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
98
Elongation at Break, % 37
18
Fatigue Strength, MPa 220
60
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 78
36
Tensile Strength: Ultimate (UTS), MPa 530
430
Tensile Strength: Yield (Proof), MPa 260
240

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Specific Heat Capacity, J/kg-K 480
270
Thermal Conductivity, W/m-K 14
22
Thermal Expansion, µm/m-K 15
5.5

Otherwise Unclassified Properties

Density, g/cm3 7.8
6.7
Embodied Water, L/kg 190
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
65
Resilience: Unit (Modulus of Resilience), kJ/m3 170
290
Stiffness to Weight: Axial, points 14
8.1
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 19
19
Thermal Diffusivity, mm2/s 3.7
12
Thermal Shock Resistance, points 13
56

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.050
Chromium (Cr), % 23 to 27
0 to 0.2
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 46.7 to 58
0 to 0.2
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 19 to 22
0
Nitrogen (N), % 0
0 to 0.025
Oxygen (O), % 0
0 to 0.16
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Zirconium (Zr), % 0
94.7 to 100