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Grade 705C Zirconium vs. AISI 440C Stainless Steel

Grade 705C zirconium belongs to the otherwise unclassified metals classification, while AISI 440C stainless steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is grade 705C zirconium and the bottom bar is AISI 440C stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 98
200
Elongation at Break, % 13
2.0 to 14
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 36
76
Tensile Strength: Ultimate (UTS), MPa 540
710 to 1970
Tensile Strength: Yield (Proof), MPa 390
450 to 1900

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Specific Heat Capacity, J/kg-K 270
480
Thermal Conductivity, W/m-K 18
22
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
39 to 88
Stiffness to Weight: Axial, points 8.1
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 22
26 to 71
Strength to Weight: Bending, points 22
23 to 46
Thermal Diffusivity, mm2/s 9.9
6.0
Thermal Shock Resistance, points 69
26 to 71

Alloy Composition

Carbon (C), % 0 to 0.1
1.0 to 1.2
Chromium (Cr), % 0
16 to 18
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.3
78 to 83.1
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.75
Niobium (Nb), % 2.0 to 3.0
0
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
Zirconium (Zr), % 91.9 to 98
0