High Speed Steels

High Speed Steels

Matrix-type high speed steel (QHZ)

The QHZ is a matrix-type high speed steel. QHZ contributes to increased productivity and reduction of manufacturing cost by dramatic improvement of dies service life.

Chemical Composition

C Si Mn Cr Mo V
PATENTED

Standards

QHZ YXR33

Features of QHZ

High strength and unrivaled toughness are both achieved by reducing massive carbides in steels.

• QHZ is a matrix-type high speed steel that combines high strength equivalent to SKH51 and excellent toughness by improving microstructure and the distribution of carbides.

• Due to superior toughness and high temperature strength combined with much higher hardness than conventional hot working die steel, QHZ is suitable for cold, warm, and hot forming.

Applications

  • Cold forging dies
  • Hot/Warm forging dies
  • Sleeves for Aluminium dies casting, etc.

Merit of QHZ

Long service life even under severe application environment

QHZ is resistant to high-temperature ware, deformation, cracking and chipping, etc; It is expected to increase the service life of dies even under severe application environment.

Positioning and Properties of QHZ

GLORIA (AISI)DINJISBOHLERUDDEHOLMHITACHI
M351.3243SKH55S705-YXM4
M421.3247SKH59S500-YXM42
T11.3355SKH2S200-YHX2
ASP20231.3395-S790ASP23HAP10
ASP20301.3294-S590ASP30HAP40
ASP20521.3253-S390ASP52HAP50
ASP20601.3292-S290ASP60HAP72
Chemical CompositionApplication
Grade

CSiMnPSCrMoVNiCuWCo
M350.920.320.280.025<0.0013.914.901.820.180.126.124.67As M2, Hobs, Drill reamers, Milling cutters and Forging Dies, Cold Forming Tools etc.
M421.090.470.300.020<0.0103.779.291.210.30.211.517.94Taps, Reamers, Broaching tools, Twist drills.
T10.780.330.290.018-3.98-1.13--18.15-Turning, planing and slotting tools, tapes, twist drills, threading dies, profile cutting tools, broaching tools, reamers.
ASP20231.280.610.300.0300.0204.004.882.980.210.146.110.24Gear cutting tools, Cold work, Broaches, Rolls, Taps, Knives, Plastic injection etc.
ASP20301.250.290.270.0200.0204.105.003.000.210.0906.308.40Standard grade/good balance of properties,
ASP20521.590.290.270.0250.234.951.944.750.210.1210.488.04Machining (Grinding, Turning, Milling), Polishing, Plastic Forming.
ASP20602.200.360.320.0260.0244.126.826.390.200.146.4810.36Good wear resistance and highest hardness of 70 HRC.