NZ3/1.2550/60WCrV8

COLD WORK TOOL STEEL

NORM: ISO 4957

APPLICATION:

Steel susceptible to cold shear knives, pneumatic tools, such as cold setts, chisels, riveting presses, mandrels, paper and wood cutting knives, cold striking stamps, ejector pins, bending moulds, demurring machines, cutting tools for machines, tools for stamping, upsetting tools, cutting tools for plates up to 10mm, pressure casting dies, drills, mill cutters, blanking dies for metal sheet products with a higher thickness and rolls for flatteners, air hammers etc.

MECHANICAL PROPERTIES:

Hardness after	Tempering ºC	Symbol	Value
Soft annealing	–	HB	≤229
Quenching with 910 ºC in oil	–	HRC	62.5
Quenching with 910 ºC in oil and tempering	180	HRC	≥58
	200	HRC	60
	225	HRC	59.5
	250	HRC	59
	300	HRC	57.5
	350	HRC	55.5
	400	HRC	53.5
	450	HRC	51

PHYSICAL PROPERTIES:

Property	Unit	Value
Density, ρ	g*cm-3	7.95
Thermal expansion, α20-100ºC)	K-1	12.4*10-6
Thermal conductivity, λ55ºC)	W*m-1*K-1	34.2

Technological treatment processes:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	1050-850
	Rolling		+	1050-850
Treatment	Heat treatment	Quenching	+	900-920
		Tempering	+	170-190
	Precipitation strengthening	Supersaturation	–	–
		Ageing	–	–
	Annealing	Soft annealing	+	710-740
		Stress relieving	+	600-700
Thermochemical treatment	Nitriding		–	–
	Other		–	–

INTERNATIONAL STEEL GRADES: