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.

CHEMICAL COMPOSITION:

CSiMnPSCrMoWVCoNi
0,73-0,83Max 0,45-Max 0,030Max 0,0303,80- 4,50-17,12-18,701,00-1,20--

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:

ISO EN Russia
HS18-0-1 ISO 4957:2004 HS18-0-1 ISO 4957:2004 R18 GOST 19265-73
US Japan China
T1 ASTM A 600-92 SKH 2 JIS G 4403-1983 W18Cr4V GB 9943-88