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Hot work tool steel-1.2714

Equivalent grades GB  DIN  AISI  JIS  -
5CrNiMoV 1.2714 L6 SKT4 -
Chemical Composition C Si Mn Cr P S V Ni Mo -
0.50-0.60 0.10-0.40 0.65-0.95 1.0-1.2 ≤0.03 ≤0.03 0.07-0.12 1.50-1.80 0.45-0.55 -
Available size Round Bar Diameter Length
16-800mm 2000-6000mm
Flat Bar Thickness Width Length
16-400mm 100-800mm 2000-6000mm
Surface condition Black surface/ Grinded/ Machined
Annealed hardness HB248MAX
 high plasticity, good hardenability , .good tenacity and strength, with great wear resistance
Applications Forging dies,hot shear knives,punches,backing plate,die holders,hot punching tools
Heat treatment Isothermal annealing Heat to 800°Cand hold at temperature for 1/2 h to 1 h;
Furnace cooling to 670°Cand hold at temperature for at least 10 hours;
Cool by 10°C/h to 630°C;
Cooling in air.
Maximum hardness:≤240 HB
Stress relieving To be carried out after maching before the final heat treatment.
Heat to 600-650°C, hold for 4-6 hours;
Cooling in furnace to 300-350°C;
Cooling in air
Hardening Initial preheating to 350-450°C;
Second preheating to 650-750°C;
Heat to hardening temperature 860-890°Cand hold at temperature;
Cooling in hot oil (40-60°C); oil quenched hardness: 54-59HRC;
Tempering Tempering must be carried out within one hour from hardening(warm part) in
the range 550-630°Cfor 4-6 hours according to hardness required, the
dimensions of the parts and operating conditions

Hot work tool steel-1.2714
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