TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 32 - 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 (M52S) Thermal treatment Softening annealing Quenching Tempering Heating to 770ºC-840ºC for heat insulation and slow cooling 1,140-1,180ºC quenching; high- speed gas quenching or hot oil cooling Tempering temperature 540- 570ºC, at least three times of tempering Tempering temperature and hardness relation curve CCT curve HIGH SPEED STEEL