DIN 1.3355 High Speed Steel |HS18-0-1|SKH2

DIN 1.3355/HS18-0-1  high speed tool steel manufacturers and suppliers, supplied in round rods,flat/square bars,plates,sheets,wire and blocks.

DIN 1.3355/HS18-0-1 is a typical Tungsten-type high speed tool steel which has a high hardness of  HRC63~66 after heat treatment. It is not easy to overheating because of its wide heat treatment quenching. The high temperature plastic of 1.3355/HS18-0-1 tool steel is poor,but the wearability is good.

DIN 1.3355/HS18-0-1 steel also has good cutting performance which is suitable for cutting tools such as twist anchor, broach, tapping, milling wash,reamer.

DIN 1.3355 HSS

Chemical Composition For DIN 1.3355 HSS


Related Specification




Critical Temperature for Heat Treatment of  DIN 1.3355 HSS

  • Ac1:820°C
  • Ac3:860°C
  • Ar1:760°C
  • Ms:210°C

DIN 1.3355 HSS Forging

  • The initial forging temperature:1150-1180°C
  • The final forging temperature:900-950°C
  • Forging times:Repeated forging to increase the amount of deformation
  • Post Forging treatment:Annealing immediately

Heat Treatment For DIN 1.3355 HSS

  • Annealing

DIN 1.3355 HSS must be annealed after hot working to eliminate internal stress and improve turning performance.The annealing temperature of 1.3355 steel is chosen at 860-880°C.Heat the temperature to 860-880°C at a rate of no more than 220°C per hour.The holding time of the material depends on the thickness of the material,usually one hour per inch of thickness(at least two hours).

According to the cooling method, it is divided into softening annealing and isothermal annealing.

For Softenig annealing,it should be cooled to 500-600°C at 20-30°C/h and then furnace cooled.Hardness below 277HBW.

For isothermal annealing,it should be cooled to 740-760°C first, then kept for 2-4h, and then cooled to 500-600°C for slow cooling.Hardness below 255HBW.

  • Hardening & Tempering For DIN 1.3355 HSS

1.Preheat DIN 1.3355 HSS with two steps,first at 450°C .then up to 850°C with a rate below 24mm/s.

2.Heat to the final hardening temperature of 1260-1300°C with a  rate beow 12-15mm/s,and make sure the material must be heated thoroughly and evenly

3.Quench in warm oil,and then complete the quench in air.(care must be taken at this step)

4.DIN 1.3355 high speed steel is suitable for vacuum hardening.

5.Tempering must be done immediately after quenching.

6.Heat thoroughly and uniformly to the tempering temperature at 560°C

7.Hold at the temperature for at least two hours (one hour per inch of the total thickness).

8.Double tempering is required.

9.Hardness above 62HRC.

DIN 1.3355 HSS Tempering Vs Hardness 

Heat Treatment:1260°C,Oil quenching

X:Tempering temperature,°C


DIN 1.3355 HSS Tempering vs hardness Curve

Supply Size & Condition For DIN 1.3355 HSS

Round bar
Diameter1-16mm10-50mm50-180mm 180-300mm
ProcessCold DrawnHot RolledHot ForgedFree Forging
Flat bar
Thickness1-2.5mm1.5-20mm 20-300mm
WidthMax 800mmMax 800mmMax 800mm
ProcessCold DrawnHot RolledHot Forged
Shape:Round / Square / Flat Bars, Sheet, Plate,Wire.
Surface Condition:Black/Turning/grinding

Quality Certification

DIN 1.3355/HS18-0-1 high speed steel is supplied in accordance with our ISO 9001:2008 registration.

A material test report(Inspection Certificate EN 10204 3.1) will be provided, documenting the following:

1.Chemical analysis
2.Surface hardness
3.Non Metallic Inclusion
4.Macroscopic Structure
6.Eutectic carbides distribution
7.Ultrasonic test report
8.Surface quality