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Grade 702C Zirconium vs. S44725 Stainless Steel

Grade 702C zirconium belongs to the otherwise unclassified metals classification, while S44725 stainless steel belongs to the iron alloys. There are 22 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 702C zirconium and the bottom bar is S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
180
Elastic (Young's, Tensile) Modulus, GPa 97
200
Elongation at Break, % 13
22
Poisson's Ratio 0.34
0.27
Rockwell B Hardness 84
84
Shear Modulus, GPa 36
81
Tensile Strength: Ultimate (UTS), MPa 430
500
Tensile Strength: Yield (Proof), MPa 310
310

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Specific Heat Capacity, J/kg-K 270
480
Thermal Conductivity, W/m-K 22
17
Thermal Expansion, µm/m-K 5.7
11

Otherwise Unclassified Properties

Density, g/cm3 6.7
7.7
Embodied Water, L/kg 450
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
99
Resilience: Unit (Modulus of Resilience), kJ/m3 510
240
Stiffness to Weight: Axial, points 8.1
15
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 18
18
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 12
4.6
Thermal Shock Resistance, points 55
16

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.015
Chromium (Cr), % 0
25 to 28.5
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.3
67.6 to 73.5
Manganese (Mn), % 0
0 to 0.4
Molybdenum (Mo), % 0
1.5 to 2.5
Nickel (Ni), % 0
0 to 0.3
Niobium (Nb), % 0
0 to 0.26
Nitrogen (N), % 0 to 0.030
0 to 0.018
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.010
0 to 0.040
Silicon (Si), % 0
0 to 0.040
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.26
Zirconium (Zr), % 94.8 to 100
0