Transformation characteristics and application of 33Mn2V steel for non-quenched/tempered oil-well tubes

The phase transformation points of 33Mn2V, steel and the continuous cooling transformation curves of the steel austenized at 1100°C without deformation and austenized at 1200°C then pierced and rolled were determined. The results show that the commonly-used "on-line normalization" is not always necessary for production of non-quenched/tempered N80 grade seamless steel tubes.