1.2162/21MnCr5

COLD WORK TOOL STEEL

NORM: ISO 4957

APPLICATION:

Steel susceptible to tools with a high surface hardness and tough core, dies and punches for cold metal forming, plastic moulds.

MECHANICAL PROPERTIES:

Hardness after	Tempering ºC	Symbol	Value
Soft annealing	–	HB	≤217
Quenching1) with 820 ºC in water	–	HRC	62
Quenching1) with 820 ºC in water and tempering 1) after carburising	180	HRC	≥60
	200	HRC	60
	250	HRC	58.5
	300	HRC	57
	350	HRC	55
	400	HRC	53.5
	450	HRC	52
	500	HRC	50.5

PHYSICAL PROPERTIES:

Property	Unit	Value
Density. ρ	g*cm-3	7.85
Thermal expansion. α20-100ºC)	K-1	11.9*10-6
Thermal conductivity. λ20ºC)	W*m-1*K-1	52

Technological treatment processes:

Technological treatment processes			Possible application	Temperature. °C
Hot forming	Forging		+	1100-850
	Rolling		+	1100-850
Treatment	Heat treatment	Quenching	+	810-830
		Tempering	+	170-190
	Precipitation strengthening	Supersaturation	–	–
		Ageing	–	–
	Annealing	Softening	+	660-700
		Stress relieving	+	600-680
Thermochemical treatment	Nitriding		–	880-950
	Other		–	880-920

INTERNATIONAL STEEL GRADES: