Grade 704C Cast Zirconium
Grade 704C zirconium is a zirconium alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has the lowest ductility among the zirconium alloys in the database.
The graph bars on the material properties cards below compare grade 704C 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
210
Elastic (Young's, Tensile) Modulus
97 GPa 14 x 106 psi
Elongation at Break
11 %
Poisson's Ratio
0.34
Rockwell B Hardness
85
Shear Modulus
36 GPa 5.2 x 106 psi
Tensile Strength: Ultimate (UTS)
470 MPa 68 x 103 psi
Tensile Strength: Yield (Proof)
310 MPa 45 x 103 psi
Thermal Properties
Latent Heat of Fusion
240 J/g
Specific Heat Capacity
270 J/kg-K 0.064 BTU/lb-°F
Thermal Conductivity
21 W/m-K 12 BTU/h-ft-°F
Thermal Expansion
5.9 µm/m-K
Otherwise Unclassified Properties
Density
6.7 g/cm3 420 lb/ft3
Embodied Water
460 L/kg 55 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
48 MJ/m3
Resilience: Unit (Modulus of Resilience)
490 kJ/m3
Stiffness to Weight: Axial
8.1 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
20 points
Thermal Diffusivity
12 mm2/s
Thermal Shock Resistance
58 points
Alloy Composition
| Zr | 92.9 to 99 | |
| Hf | 0 to 4.5 | |
| Sn | 1.0 to 2.0 | |
| 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