Nickel alloy raises resistance to corrosion

Nickel alloy raises resistance to corrosion

Keywords Alloys, Corrosion resistance, Inco Alloys International, Nickel

A nickel alloy with improved resistance to fatigue and hot salt corrosion has been announced by Inco Alloys International, Huntington, West Virginia, USA.

Incoloy 864 has composition Fe, 34 Ni, 21 Cr, 4.2 Mo. Tensile strength is said to be 655Mpa(95ksi), yield strength is 262Mpa (38ksi), elongation is 45 per cent, and hardness is 80HRB.

The alloy was developed initially for exhaust system flexible couplings, and has other applications in gas recirculation tubes and other fabricated components. Readily weldable, it is being offered mainly as an alternative to 321 and 316 Ti stainless steels. It is said to have comparable mechanical properties and work hardening rates, and good thermal stability and ductility after prolonged exposure at temperatures up to 650°C (1200°F). It reportedly has improved resistance to fatigue and hot salt corrosion, and to chloride stress-corrosion cracking and pitting.

The alloy is available for development testing in strip and sheet.

Further information from H. Lee Flower, Inco Alloys International, 3200 Riverside Drive, P.O. Box 1958,Huntington, West Virginia 25705-1771, USA. Tel: +1 304/526 5394.