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ACI-ASTM CK20 Steel vs. Grade 702C Zirconium

ACI-ASTM CK20 steel belongs to the iron alloys classification, while grade 702C zirconium belongs to the otherwise unclassified metals. There are 21 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 ACI-ASTM CK20 steel and the bottom bar is grade 702C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
180
Elastic (Young's, Tensile) Modulus, GPa 200
97
Elongation at Break, % 37
13
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
310

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
5.7

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
52
Resilience: Unit (Modulus of Resilience), kJ/m3 170
510
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
55

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.1
Chromium (Cr), % 23 to 27
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 46.7 to 58
0 to 0.3
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 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Zirconium (Zr), % 0
94.8 to 100