Aluminum Extrusion

1.2344 VEXtra

Hot work tool steel with ESR properties. Good combination of hot strength and toughness and also hot wear resistance.

Chemical Composition

NO DIN C Si Mn P S Cr Mo V
V’1.2344 X40CrMoV5-1 0,35-0,43 0,80-1,20 0,25-0,50 Max 0,02 Max 0,005 4,80-5,50 1,20-1,50 0,85-1,15

Material Properties

  • Good hot strength and tempering back resistance.
  • Resistant to thermal shock
  • Very high toughness and ductility.
  • Good weldability
  • Good machinability
  • Up to 54 HRc after heat treatment
  • The recommended working hardness 44-52
  • Good nitriding and coating ability

Applications

  • Aluminium extrusion dies, support blocks, bolster, stamp, staples, sealed cores.
  • Secondary areas in die casting dies such as biscuit and runner,
  • Shot Sleeve in HPDC
  • Any type of press forging applications.
  • High wear resistant and hard (48 HRc) dies for large production number.
  • Upper and also bottom dies in low pressure die casting.
  • Gravity molds.
  • Industrial knives.

Heat Treatment

HEAT TREATMENT TEMPERATURE
Soft Annealing 820-860°C
Stress Relieving 600-650°C
Hardening 1020-1060°C
Tempering 530-700°C

Physical properties

20°C 100°C 400°C 500°C 600°C
Elastic Modulus [kN/mm²] 215 - 179 - 168
Thermal Expansion Coefficient [10ˉ6/K] - 10,7 11,0 - 13
Thermal Conductivity [W/mK] 26 - 27,9 28,5 29,3

Delivery Condition

230 HB, Soft annealed.

Tempering Graph