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EN 1.7221 Steel vs. Grade 702C Zirconium

EN 1.7221 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 (11, in this case) are not shown.

For each property being compared, the top bar is EN 1.7221 steel and the bottom bar is grade 702C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 230
180
Elastic (Young's, Tensile) Modulus, GPa 190
97
Elongation at Break, % 11 to 17
13
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 73
36
Tensile Strength: Ultimate (UTS), MPa 650 to 780
430
Tensile Strength: Yield (Proof), MPa 430 to 630
310

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 44
22
Thermal Expansion, µm/m-K 13
5.7

Otherwise Unclassified Properties

Density, g/cm3 7.8
6.7
Embodied Water, L/kg 51
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 98
52
Resilience: Unit (Modulus of Resilience), kJ/m3 490 to 1050
510
Stiffness to Weight: Axial, points 13
8.1
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 23 to 27
18
Strength to Weight: Bending, points 21 to 24
19
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 19 to 23
55

Alloy Composition

Carbon (C), % 0.22 to 0.29
0 to 0.1
Chromium (Cr), % 0.8 to 1.2
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 96.8 to 98.3
0 to 0.3
Manganese (Mn), % 0.5 to 0.8
0
Molybdenum (Mo), % 0.15 to 0.3
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.010
Silicon (Si), % 0 to 0.6
0
Sulfur (S), % 0 to 0.030
0
Zirconium (Zr), % 0
94.8 to 100