SW18/1.3355/HS18-0-1

HIGH-SPEED STEEL

NORM: ISO 4957

APPLICATION:

Steel susceptible to roughing and finishing tools, for the tools working on average strength materials, e.g. turning, slotting and planing tools, mills, drills, threading dies, reamers and blades and profile cutting tools etc.

MECHANICAL PROPERTIES:

Hardness after	Tempering ºC	Symbol	Value
Soft annealinh	–	HB	≤269
Quenching with 1260 ºC in oil	–	HRC	63
Quenching with 1260 ºC in oil and tempering (cooling during quenching can be performed gradually in the salt bath at the temperature of around 550 ºC and then cooled in the air)	350	HRC	62
	400	HRC	62
	450	HRC	63.5
	500	HRC	64.5
	550	HRC	65
	600	HRC	63
	650	HRC	59
	700	HRC	48

PHYSICAL PROPERTIES:

Property	Unit	Value
Density, ρ	g*cm-3	8.61

Technological treatment processes:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	1150-900
	Rolling		+	1150-900
Heat treatment	Soft annealing		+	800-900
	Stress relieving		+	600-700
	Quenching	Heating I	+	~550
		Heating II	+	850
		Austenitising	+	1230-1270
	Tempering		+	550-570
Surface treatment	Nitriding		+	510-530
	Coat application		+	PVD

INTERNATIONAL STEEL GRADES: