Zr702 Zirconium Crucible | UNS R60702
- High-purity unalloyed zirconium, UNS R60702 (Zr702)
- Zr + Hf ≥ 99.2%, with Hf ≤ 4.5%
- Melting point 1852°C; recommended use temperature 500–600°C (max 900°C for fusion)
- Outstanding corrosion resistance to almost all acids (except hydrofluoric acid), alkalis, and salt melts
- Immune to stress corrosion cracking (SCC); high resistance to pitting and crevice corrosion
- Excellent for fusion processes with lithium and sodium salts in analytical chemistry
- Available in tapered, low-form, and cylindrical shapes
- Standard thicknesses: 1mm, 1.5mm, 2mm; custom thicknesses available
- Surface finishes: machined, polished
- Compliant with ASTM B550 / ASME SB-550
Description Of Zr702 Zirconium Crucible | UNS R60702
Zr702 Zirconium Crucible is a laboratory and industrial-grade container manufactured from unalloyed zirconium to ASTM B550 standard. It is designed to hold and heat materials at high temperatures while resisting attack from aggressive chemical media.
Zirconium 702 is commercially pure zirconium characterized by immunity to stress corrosion cracking (SCC) and high resistance to pitting and crevice corrosion. Its corrosion resistance comes from a tightly adhered protective oxide layer (ZrO₂) that forms almost instantaneously on the surface. As a result, zirconium crucibles resist the corrosion of almost all acids—except hydrofluoric acid (HF), which is the only cleaning agent that should not be applied to zirconium crucibles .
Zirconium 702 crucibles are often used as a cost-effective replacement for conventional platinum labware due to their similar thermochemical properties . They are widely used for high-temperature applications such as metal and salt melting, and are ideal for highly corrosive fusion processes (lithium and sodium salt fusions) in analytical chemistry and chemical processing .
Available in tapered, low-form, and cylindrical shapes with capacities from 10 mL to 1000 mL. Standard wall thicknesses are 1mm, 1.5mm, and 2mm, with custom thicknesses available upon request . The material complies with ASTM B550 / ASME SB-550 and is manufactured under ISO 9001 quality systems.
Features Of Zr702 Zirconium Crucible | UNS R60702
High Purity: UNS R60702 with Zr + Hf ≥ 99.2%, ensuring minimal contamination in critical applications.
Excellent Corrosion Resistance: Resists almost all acids (except HF), alkalis, and salt melts. Immune to stress corrosion cracking.
Cost-Effective Platinum Replacement: Similar thermochemical properties to platinum at a fraction of the cost .
High Melting Point: 1852°C; recommended use temperature 500–600°C, max 900°C for fusion applications .
Multiple Shapes Available: Tapered, low-form, and cylindrical to suit different applications.
Customizable Dimensions: Standard thicknesses 1mm, 1.5mm, 2mm; capacities from 10 mL to 1000 mL; custom sizes available .
Surface Finishes: Machined and polished surfaces for clean handling.
Standard Compliance: ASTM B550 / ASME SB-550.
ISO 9001 Certified: Full traceability and quality assurance.
Applications Of Zr702 Zirconium Crucible | UNS R60702
Analytical Chemistry: Fusion processes with lithium and sodium salts, sample digestion, and replacement of platinum crucibles to reduce cost .
Metal Melting: Melting and casting of reactive metals and alloys, including titanium and hafnium .
Chemical Processing: Handling aggressive chemicals and corrosive agents at elevated temperatures .
Nuclear Industry: Due to zirconium's low neutron absorption cross-section, suitable for nuclear-related applications .
Laboratory and Research: High-temperature reactions with strong corrosive media, material science experiments .
Semiconductor and High-Purity Materials: Melting and purification of high-purity materials like silicon and germanium to avoid contamination .
Specifications Of Zr702 Zirconium Crucible | UNS R60702
| Parameter | Specification |
|---|---|
| Material | Unalloyed zirconium |
| UNS Designation | R60702 (Zr702) |
| Standard | ASTM B550 / ASME SB-550 |
| Chemical Composition (nominal) | Zr + Hf ≥ 99.2%; Hf ≤ 4.5%; Fe + Cr ≤ 0.20%; H ≤ 0.005%; N ≤ 0.025%; C ≤ 0.05%; O ≤ 0.16% |
| Density | 6.51 g/cm³ |
| Melting Point | 1852°C |
| Recommended Use Temperature | 500 – 600°C (max 900°C for fusion) |
| Standard Thickness | 1 mm, 1.5 mm, 2 mm (custom available) |
| Shapes | Tapered, Low-form, Cylindrical |
| Capacity Range | 10 mL – 1000 mL (custom available) |
| Diameter Range | 20 – 200 mm (custom available) |
| Height Range | 20 – 200 mm (custom available) |