TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 20 - Descriptions and data in the file are typical cases. We will not make guarantee for them. Besides, we reserve the final right to interpret improvement in materials, quality and/or performance. Steel grade (TGM42) Thermal treatment Softening annealing Quenching Tempering Heating to 850ºC for heat insulation; cooling to 550ºC slowly and then removing from the furnace 1,175-1,180ºC quenching; high- speed gas quenching or hot oil cooling Tempering temperature 540- 570ºC, at least three times of tempering 1,180ºC quenching Tempering temperature and hardness relation curve CCT curve