HIGH-SPEED STEEL
Standard: ISO 4957
STEEL GRADE:1.3355/HS18-0-1/SW18
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
| C | Si | Mn | P | S | Cr | Mo | W | V | Co | Ni |
|---|
| 0,73-0,83 | Max 0,45 | - | Max 0,030 | Max 0,030 | 3,80- 4,50 | - | 17,12-18,70 | 1,00-1,20 | - | - |
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 | CEN | 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 |
