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Grade 705C Zirconium vs. S43940 Stainless Steel

Grade 705C zirconium belongs to the otherwise unclassified metals classification, while S43940 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 705C zirconium and the bottom bar is S43940 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
160
Elastic (Young's, Tensile) Modulus, GPa 98
200
Elongation at Break, % 13
21
Poisson's Ratio 0.34
0.28
Rockwell B Hardness 87
76
Shear Modulus, GPa 36
77
Tensile Strength: Ultimate (UTS), MPa 540
490
Tensile Strength: Yield (Proof), MPa 390
280

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Specific Heat Capacity, J/kg-K 270
480
Thermal Conductivity, W/m-K 18
25
Thermal Expansion, µm/m-K 5.7
10

Otherwise Unclassified Properties

Density, g/cm3 6.7
7.7
Embodied Water, L/kg 450
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 66
86
Resilience: Unit (Modulus of Resilience), kJ/m3 790
200
Stiffness to Weight: Axial, points 8.1
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 22
18
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 9.9
6.8
Thermal Shock Resistance, points 69
18

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.030
Chromium (Cr), % 0
17.5 to 18.5
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.3
78.2 to 82.1
Manganese (Mn), % 0
0 to 1.0
Niobium (Nb), % 2.0 to 3.0
0.3 to 0.6
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.010
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0.1 to 0.6
Zirconium (Zr), % 91.9 to 98
0