The Heat Treatment of Wires: A Preliminary Report

Abstract
The changes induced by a heat treatment have been examined on a standard 18/8 Stainless Steel wire (grade 302 S25 of BS 970: Part 4), and a heat treatable wire of cobalt—chrome—nickel alloy. The flexural rigidity, elastic properties after forming over a wide strain range, resistance to failure in bending and elastic recovery after a heat treatment were examined. The optimal heat treatments were found to be 400–450°C and 475–525°C for the 18/8 and cobalt—chrome—nickel alloy respectively. These optima were unchanged for heat-treatment times between 1 and 16 minutes.