Mechanical Properties Of As Rolled and Tempered 5SP Steel
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 9
Abstract
The effect of tempering temperature and time on the mechanical properties of as – rolled 5SP steel, has been investigated. 12mm ribbed bar samples were taken out of the production batch of 10th June 2007 of the light Section Mill of Ajaokuta Steel Plant. The samples were prepared and quenched in water at room temperature before being tempered at various temperatures between 400 oC and 600 oC and varying lengths of time from 1hr to 3hrs. Results show significant improvement in the yield strength, tensile strength, hardness and impact strength investigated. The tempering temperature-time range for the best yield and tensile strengths were 500 to 600oC and 1 to 1.5hrs while for impact strength, temperatures of 500oC to 600oC and holding time of 2 to 3 hours gave the best results. The gain in yield and tensile strengths of 5SP steel on tempering indicates the viability of an on line thermal treatment during rolling. A chart relating tempering time/temperature and hardness of the steel was established using Hollomon Jaffe tempering parameter.
Authors and Affiliations
Mbah. C. N. , Ezeh, I. N. , Okorie, B. A.
Keywords
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