Plastic Injection

– Mold Holders –

V’1.2312

Prehardened (30-33 HRc) plastic mold steel known as P20+S with very good machinability due to the sulphur content.

Chemical Composition

NO DIN AISI C Si Mn P S Cr Mo
V’1.2312 40CrMnMoS8-6 P20+S 0.35-0.45 0.20-0.50 1.30-1.60 Max 0,025 0,10-0,50 1.80-2.10 0.15-0.25

Material Properties

  • Very good machinability even if it is prehardened.
  • Perfect for gun drilling and rapid drilling
  • Perfect for fast milling
  • Great hardness homogeneity along the cross-section area up to 300 mm thickness.
  • Not suitable for mirror polishing, texturing
  • Weak weldability
  • The recommended working hardness is the delivery hardness.
  • Good nitriding ability.

Applications

  • All kind frames and holders for molds and dies
  • Plastic injection mould cores and cavities (not cosmetic parts)
  • Plastic injection mould cores (not cosmetic sides)
  • Die casting die holders
  • Machinery equipment.
  • Wearing Plates.

Heat Treatment

HEAT TREATMENT TEMPERATURE
Soft Annealing 700-750°C
Stress Relieving 550-650°C
Hardening 830-870°C
Tempering 600-680°C

Physical Properties

20°C 100°C 200°C 300°C
Elastic Modulus [kN/mm²] 210 - 195 -
Thermal Expansion Coefficient [10ˉ6/K] - 12,1 12,7 13,2
Thermal Conductivity [W/mK] 34,0 35.0 35.6 36,4
Toughness 20 - - -
Strength [N/mm²] 850 - - -

Delivery Condition

Prehardened, 280-320 HB.

Tempering Graph