Grade 705C Cast Zirconium
Grade 705C zirconium is a zirconium alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has a moderately low ductility and a moderately high tensile strength among zirconium alloys.
The graph bars on the material properties cards below compare grade 705C zirconium to: zirconium alloys (top), all alloys in the same category (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Brinell Hardness
200
Elastic (Young's, Tensile) Modulus
98 GPa 14 x 106 psi
Elongation at Break
13 %
Poisson's Ratio
0.34
Rockwell B Hardness
87
Shear Modulus
36 GPa 5.3 x 106 psi
Tensile Strength: Ultimate (UTS)
540 MPa 78 x 103 psi
Tensile Strength: Yield (Proof)
390 MPa 57 x 103 psi
Thermal Properties
Latent Heat of Fusion
250 J/g
Specific Heat Capacity
270 J/kg-K 0.064 BTU/lb-°F
Thermal Conductivity
18 W/m-K 10 BTU/h-ft-°F
Thermal Expansion
5.7 µm/m-K
Otherwise Unclassified Properties
Density
6.7 g/cm3 420 lb/ft3
Embodied Water
450 L/kg 54 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
66 MJ/m3
Resilience: Unit (Modulus of Resilience)
790 kJ/m3
Stiffness to Weight: Axial
8.1 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
22 points
Strength to Weight: Bending
22 points
Thermal Diffusivity
9.9 mm2/s
Thermal Shock Resistance
69 points
Alloy Composition
| Zr | 91.9 to 98 | |
| Nb | 2.0 to 3.0 | |
| Hf | 0 to 4.5 | |
| Fe | 0 to 0.3 | |
| O | 0 to 0.3 | |
| C | 0 to 0.1 | |
| N | 0 to 0.030 | |
| P | 0 to 0.010 | |
| H | 0 to 0.0050 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B752: Standard Specification for Castings, Zirconium-Base, Corrosion Resistant, for General Application