TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 16 - 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. HEAT TREATMENT : Annealing: O Annealing temperature: 860-880 C, keep this temperature by 2-4 hours, then cooling to O O 600 C in the speed of less than 30 C/h if after cold drawn precess, suggest and stress O relieving annealing process. Under the temperature of 600-700 C, keep this temperature by 2 houres. Quenching & Tempering (salt bath). QUENCHING : Pre-heating in two steps : O O Heating temperature under : 400-500 C and 850-900 C O Austenitizing temperature : 1180-1220 C O Heating coefficient 10-15sec/mm, quenching under 580-620 C, then cooling to room temperature Tempering : O Tempering temperature under : 540-560 C, tempering 3 times, each time 1 hour, then cooling to room temperature. Steel Grade (TG M-35 (DIN-1.3243)