TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

Steel grade (O2) Thermal treatment Softening annealing Quenching Tempering Heating to 690~720ºC for heat insulation and cooling slowly in the furnace 790~820ºC quenching, oil cooling Selecting tempering temperature as per hardness; times of tempering: twice Tempering temperature and hardness relation curve CCT curve The Name You Can Trust www.tgkssl.com - 40 - 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.