TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 96 - 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 (DB6 - DIN 1.2714) Heat Treatment Stress relieving Soft annealing Hardening Quenching hardness Tempering Working hardness Temperature Duration Cooling 0 : Approx. 650 C in the annealed state : 1 hour per 50 mm wall thickness : furnace Temperature Duration Cooling 0 : 700 C : 1 hour per 25mm wall thickness : furnace Temperature Duration 0 : 880 C : 1 minute per mm wall thickness Max. 58 HRC : in water/oil, protective atmosphere/oil, oil, hot bath or vacuum Temperature Duration Cooling : See tempering curve : 1 hour per 25mm wall thickness : Air 300-440 HB depending on application 0 Note: Pre-heating of the tools to 250-280 C is recommended. Width Thickness 210 260 310 360 410 460 510 210 260 310 360 410 460 510 560 610 660 710 810 1010 1500                                                                      Tempering curve TTT curve (continuous HOT WORK STEEL