TGK SPECIAL STEEL PVT. LTD.

HOT WORKING TOOL STEEL Grade 1.2714 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). APPLICATIONS 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). Standards IS 55NiCrMoV7 Chemical Analysis Typical Value % (Min - Max) Delivery Condition C S P Si Mn Ni Cr Mo V other Heat Treatment Hardness 0.50- 0.60 1.10- 0.40 0.60- 0.90 0.80- 1.20 *** Quench & Tempered 360-400 HB < CHEMICAL COMPOSITION (%) 0.004 < 0.030 < 1.50- 1.20 0.35- 0.55 0.05- 0.15 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 DELIVERY STATUS : In Quench & Tempered Condition GRAIN SIZE ACC TO ASTM E112: 6 AND FINER ULTRASONIC TEST: OK According to SEP 1921, (DEC.84) D/d REDUCTION RATIO: Min. 4/5 : 1 CLEANLINESS STANDARD: ASTM E-45-METHOD A PRODUCTION PROCESS ROUND BAR: 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 FLAT BAR: EAF LF VD HOT FORGED ANNEALED OIL QUENCH & TEMPERED 2 TIMES TEMPERED 6 SIDES MACHINED (Blocks) TURNED BRIGHT (Rounds) Width Thickness 210 260 310 360 410 460 510 560 610 660 710 810 1010 1500                                                                      210 260 310 360 410 460 510 HEAT TREATMENT 0 Note: Pre-heating of the tools to 250-280 C is recommended. 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 Stress relieving Soft annealing Hardening Quenching hardness Tempering Working hardness 30