WNL/1.2713/55NiCrMoV6 - Sale of quality steels

HOT WORK TOOL STEEL

NORM: PN-86/H-85021

APPLICATION:

Steel susceptible to tool applications. For bearings, springs, rollers, chuck parts, homogeneous average and small drop forging dies and for anvils for presses and hammers, a trimming plate, for less loaded tools for the extrusion of pipes and rods of copper and light metal alloys and stamping dies for the extrusion of plastic products, moulds for forging, die holders, piercers.

CHEMICAL COMPOSITION:

C	Si	Mn	P	S	Cr	Mo	W	V	Co	Ni
0,50-0,60	0,15-0,40	0,50-0,80	Max 0,030	Max 0,030	0,50-0,80	0,15-0,25	-	-	-	1,40-1,80

MECHANICAL PROPERTIES:

Hardness after	Tempering ºC	Symbol	Value
Soft annealing	–	HB	≤241
Quenching	–	HRC	62
Quenching and tempering	300	HRC	53
	350	HRC	51
	400	HRC	49
	450	HRC	47
	500	HRC	44.5
	550	HRC	42
	600	HRC	37.5

Technological treatment processes:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	1100-850
Hot forming	Rolling		+	1100-850
Treatment	Heat treatment	Quenching	+	840-860
	Heat treatment	Tempering	+	450-550
	Precipitation strengthening	Supersaturation	–	–
	Precipitation strengthening	Ageing	–	–
	Annealing	Soft annealing	+	650-680
	Annealing	Stress relieving	+	600-650
Thermochemical treatment	Nitriding		+	470-550
Thermochemical treatment	Other		–	–

INTERNATIONAL STEEL GRADES:

ISO		EN		Russia
–	–	55NiCrMoV6	DIN 17350	5XHM	GOST 5950-73
US		Japan		China
–	–	SKT4	JIS G4404-1972	–	–