EFFECT NICKEL AND QUENCH-TEMPER PROCESS ON MECHANICAL AND CORROSION PROPERTIES OF ASTM A588 WAETHERING STEEL

The mechanical improvement and "self-protection" properties are mainly needed to develop weather-resistant steel materials. In this study, A588 was given thermomechanical treatment (hot-rolling) followed by a quench-tempering process. is modified adding 1, 2, 3 wt% nickel the primary alloy. Steel made using hot rolling process at 750 ℃ for 1 hour with 70% thickness reduction. sample heat-treated 850 quenched in water, oil, open air. tempering conducted 400 30 minutes. Metallography test confirmed final microstructural compared CCT simulation result. fast cooling (water oil quenchant) produces tempered martensite, ferrite, pearlite, while air-cooled forms ferrite-pearlite. rate significantly affects strength hardness addition on hardness, both factors have no significant ductility. owns highest tensile value (~1226 MPa) %Ni, ductility (around 17.1–27.43%) obtained air cooling. With 3% Ni, corrosion decreases 0072 mpy -432.5 mV potential 0.12µA/cm-2 current density.