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S44725 Stainless Steel vs. Grade 705C Zirconium

S44725 stainless steel belongs to the iron alloys classification, while grade 705C zirconium belongs to the otherwise unclassified metals. 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 S44725 stainless steel and the bottom bar is grade 705C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
200
Elastic (Young's, Tensile) Modulus, GPa 200
98
Elongation at Break, % 22
13
Poisson's Ratio 0.27
0.34
Rockwell B Hardness 84
87
Shear Modulus, GPa 81
36
Tensile Strength: Ultimate (UTS), MPa 500
540
Tensile Strength: Yield (Proof), MPa 310
390

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Specific Heat Capacity, J/kg-K 480
270
Thermal Conductivity, W/m-K 17
18
Thermal Expansion, µm/m-K 11
5.7

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
66
Resilience: Unit (Modulus of Resilience), kJ/m3 240
790
Stiffness to Weight: Axial, points 15
8.1
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 18
22
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 4.6
9.9
Thermal Shock Resistance, points 16
69

Alloy Composition

Carbon (C), % 0 to 0.015
0 to 0.1
Chromium (Cr), % 25 to 28.5
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 67.6 to 73.5
0 to 0.3
Manganese (Mn), % 0 to 0.4
0
Molybdenum (Mo), % 1.5 to 2.5
0
Nickel (Ni), % 0 to 0.3
0
Niobium (Nb), % 0 to 0.26
2.0 to 3.0
Nitrogen (N), % 0 to 0.018
0 to 0.030
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 0.040
0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.26
0
Zirconium (Zr), % 0
91.9 to 98