TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

Steel grade (O1) Thermal treatment Softening annealing Quenching Tempering Heating to 780ºC for heat insulation; cooling to 650ºC at 15ºC/h for air cooling 800~850ºC quenching, oil cooling Minimum tempering temperature 180ºC, selecting tempering temperature as per hardness requirements and tempering for twice Tempering temperature and hardness relation curve CCT curve The Name You Can Trust www.tgkssl.com - 48 - 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. COLD WORK STEEL