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1.2738 TSHH steel for plastic moulds

DESIGNATION:

DIN:	Special alloy
AFNOR:	–
UNI:	–
AISI:	–

INDICATORY ANALYSIS:

C	0.26
Mn	1.45
Cr	1.25
Mo	0.50
Ni	1.05
V	0.12

STRENGH:

33 - 38 HRC
(≈ 1050 - 1200 N/mm²)

THERMAL CONDUCTIVITY AT 250°C:

41.3W/m K

CHARACTER:

Modified, pre-toughened steel for plastic moulds, which is characterised by good polishability and optimal grainability; high thermal conductivity and wear resistance

APPLICATION:

Cavity plates without dimension restrictions, with deep cavities and high core loads

TREATMENT BY:

Polishing, etching, EDM, nitriding:
highly suitable

Hard chrome plating:
is possible

HEAT TREATMENT:

Already pre-toughened; usually no heat treatment required

Soft annealing:
720°C 1 hour per 25 mm part thickness
slow controlled cooling inside the furnace
max. 245 HB

Hardening:
880 °C
keep curing temperature for 15 to 30 minutes
cooling in hot bath/oil/compressed gas
obtainable hardness: 50 HRC

Tempering:
slow heating to tempering temperature immediately after hardening;
minimum time in furnace: 1 hour per 25 mm part thickness

TEMPERING CHART: