TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 95 - 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) Characteristics : Classic die steel like grade 2713, but with better tempering properties and better through-hardening properties to a reference diameter of 450mm. For larger dimensions we recommend grade 2714 ISO-B MOD or hardening and tempering after contour roughing. For hardness up to 440 HB ( approx. 1500 MPa). Applications : Large press dies for forming aluminium, forging dies for large quantities regardless of die size and shape of cut, die and mould holders, tool holders and cold forging die holders, tool cassettes. Hydroforming moulds (IHU). Chemical Composition: (%) IS Delivery Condition C S P Si Mn Ni Cr Mo V Heat Treatment Hardness 0.50- 0.60 Hb 360-400 < 1.10- 0.40 < 0.030 < 0.004 0.60- 0.90 1.50- 1.80 0.80- 1.20 0.35- 0.55 0.05- 0.15 Standards Chemical Analysis Typical Value % (Min - Max) 55NiCrMoV 7 Physical Properties (reference value) -6 Thermal expansion coefficient (10 /K) Thermal conductivity (W/mK) Young’s modulus (GPa) O 20-100 C | 12.2 O 20 C | 36.0 O 20 C | 215 O 20-250 C | 13.1 O 250 C | 37.5 O 250 C | 198 O 20-500 C | 14.2 O 500 C | 34.5 O 500 C | 175 High-temperature yield strength Quenched and tempered state 0.2% yield strength in MPa at temperature O 450 C 900 810 610 O 500 C 740 590 460 O 550 C 460 390 280 O 600 C 220 200 150 ~ 1570 MPa ~ 1370 MPa ~ 1180 MPa PRODUCTION PROCESS: DELIVERY STATUS : In Quench & Tempered Condition GRAIN SIZE ACC TO ASTM E112 : 6 AND FINER Flat Bar: EAF LF VD HOT FORGED ANNEALED OIL QUENCH & TEMPERED 2 TIMES TEMPERED 6 SIDES MACHINED (Blocks) TURNED BRIGHT (Rounds) Rounds : 102 , 112 , 122, 132 , 142 , 152, 162, 172, 182, 202, 212, 222, 232, 242 , 252, 262 ,272, 282 , 302, 322, 330, 342, 352, 382, 392, 402 , 412, 435 , 452, 482, 512 , 532 , 603 , 653 ULTRASONIC TEST : OK According to SEP 1921, (DEC.84) D/d REDUCTION RATIO : Min. 4/5 : 1 CLEANLINESS STANDARD : ASTM E-45-METHOD A Quench & Tempered HOT WORK STEEL