1.2767 45 NiCrMo 16

1.2767 (45 NiCrMo 16)

AFNOR 435 NCD 5

Chemical composition % C Si Mn Cr Mo Ni
0.45 0.20 0.40 1.30 0.30 4.00

Tool steel for highly stressed closed-die coining, cold hobbing tools, cold shearing knives as well as the manufacture of plastic moulds.

Tempering diagram
1.2767-a
  • Hardness temperature: 850°C
  • Sample cross section: rect. 20mm
Heat treatment diagram
1.2767-1b
Repair welding

There is the danger of fracture during welding work, as is general with tool steels.


TTT diagram for continuous cool down
1.2767-2a
  • Austenitisation temperature: 840°C
  • Dwell time: 15 minutes
623...435 Hardness in HV
  • 1...98 Microstructure components in %<
  • 0.14...5.6 Cooling parameters, i.e. cooling duration from 800 - 500°C in seconds x 10 (power -2)
  • 20 K/min...0.2 K/min
  • Cooling speed in K/min in the 800 - 500°C range
  • B...Bainite
Microstructure mass diagram
1.2767-2b

B...Bainite

  • —— Water cooling
  • ------ Oil cooling
  • – • – Air cooling
  • 1... Work piece edge
  • 2... Work piece centre
  • 3... Jominy sample: distance from front face

Isothermic TTT diagram
1.2767%203a.Seite
  • Austenitisation temperature: 840°C
  • Dwell time: 15 minutes
Dependence of grain hardness and hardening depth on the work piece diameter
1.2767%203b.Seite
  • Hardness temperature: 850°C
  • Hardening medium: oil

Obtainable as the following products:

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1.2767 45 NiCrMo 16

Tool steel for highly-stressed solid constructed embossing dies, cold hobbing tools, cold shear knives and for the manufacture of plastic moulds

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