Havar® Foil

Havar® (UNS R30004) foil is precision rolled, precipitation-hardening cobalt-base alloy (Co 42%, Cr 20%, Ni 13%, Fe 19%, Mo 4%, W 2.8% (wt%), density 8.3 g/cm³) developed for applications requiring exceptional mechanical strength, corrosion resistance, and radiation transparency in a non-magnetic material. The alloy's high tensile strength (1380-1725 MPa) and pressure resistance make it the standard choice for cyclotron target windows in medical isotope production, where 25-75 microns foils withstand 10-30 bar pressure differentials while maintaining radiation transparency for efficient production of ¹⁸F-FDG, ⁶⁴Cu, ⁶⁸Ga, and ⁸⁹Zr isotopes used in diagnostic imaging and targeted therapies. Havar®'s non-magnetic properties (ur ≈ 1) and minimal beam scattering make it equally critical for particle detector entrance windows in nuclear physics research, while its fatigue resistance and dimensional stability enable reliable performance in aerospace pressure transducers, burst discs, and sensor diaphragms operating from cryogenic temperatures up to 400 °C. The material's low outgassing rate (<10⁻¹⁰ torr·L/(s·cm²)) suits high-vacuum chamber windows, its corrosion resistance handles aggressive chemical environments, and its low hydrogen diffusion prevents tritium contamination in radioisotope production. Available in foil (2.5-500 microns), light-tight foil (pinhole-free for hermetic sealing), coils, precision discs or even custom components including precision-cut shapes, laser-machined patterns, or formed assemblies to meet specific design requirements (technical drawings), eliminating the need for investing in specialized processing equipment. Havar® foil can be supplied with complete traceability, certification documentation, and additional characterization testing can be provided upon request.