1.2311/40CrMnMo7

PLASTIC MOULD STEEL

APPLICATION:

Steel susceptible to plastic moulds, injection mould inserts and bases, frames for plastic pressure dies and stamping dies. Steel provides polishability of injection moulds.

MECHANICAL PROPERTIES:

Hardness after	Tempering ºC	Symbol	Value
Soft annealing	–	HB	≤230
Quenching with 860 ºC in oil	–	HRC	52
Quenching with 860 ºC in oil and tempering	100	HRC	≥51
	200	HRC	50
	300	HRC	48
	400	HRC	46
	500	HRC	42
	550	HRC	38
	600	HRC	36
	650	HRC	28

PHYSICAL PROPERTIES:

Property	Unit	Value
Density. ρ	g*cm-3	7.83
Thermal expansion. α20-100ºC)	K-1	12.1*10-6
Thermal conductivity. λ20ºC)	W*m-1*K-1	39

Technological treatment processes:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	1050-850
	Rolling		+	1050-850
Heat treatment	Toughening	Quenching	+	840-880
		Normalisation	+	850-900
		Tempering	+	600-620 180-220
	Precipitation strenghtening	Supersaturation	–	–
		Ageing	–	–
	Annealing	Soft annealing	+	720-780
		Stress relieving	+	550
Thermochemical treatment	Nitriding		+	480-570
	Other		–	–

INTERNATIONAL STEEL GRADES: