AISI - D2


Description

High-duty cutting tools (dies and punches), blanking and punching tools, woodworking tools, shear blades for cutting light-gauge material, thread rolling tools, tools for drawing, deep drawing and cold extrusion, pressing tools for the ceramics and pharmaceutical industries, cold rolls (working rolls) for multiple-roll stands, measuring instruments and gauges, small moulds for the plastics industry where excellent wear resistance is required.

Equivalent Grades

American German Japanese China Poland
  (W.Nr) (DIN)      
AISI - D2 1.2379X155CrVMo12-1SKD-11Cr12MoV-

Chemical Composition (AISI - D2)

  C Si Mn P S Cr Mo V W Co Ni
AISI - D2 1.50-1.600.10-0.400.15-0.450.00-0.0300.00-0.03011.00-12.000.60-0.800.90-1.10---

Properties

1. Steel with 12% chromium alloyed with vanadium.

2 .Very good wear resistance and excellent cutting performance.

3. High toughness.

4. Can be nitrated (after secondary quenching).

5 .Suitable for vacuum quenching.

Applications

1. Punch 

2. Immediate Roller for Cold Rolling 

3. Mould4. Rolling Cutter 

4. Shaping Wheel. 

5. Screw Wheel 

6. Screw Mould 

7. Drawing Die

Heat Treatment

1. Annealing---Heating slowly and uniformly to 800~850℃, furnace cooling to 600℃ at a rate 10~20℃/h., Hardness max. HB 255.

2. Stress Relieving---650~700℃, furnace cooling. 

3. Hardening---Preheating(1):Warming to 550~600℃, holding 30 minutes per 25 mm.Preheating(2):Warming to 800~850℃, holding 30 minutes per 25 mm. Austenitizing:Heating to 975~1050℃, holding 30 minutes per 25 mm. Quenchant:By oil (40~70℃) or by air.

4. Tempering---Low temperature tempering:Heating to 150~200℃, holding over 60 minutes per 25 mm. Air-cooling. Hardness min. HRC 61High temperature tempering:Heating to 480~540℃, holding over 60 minutesper 25 mm. Air-cooling. Double tempering. Hardness min. HRC 58 

Notes:In low temperature tempering, steel must be hold at lower austenitizing temperature, about 975~1025℃. In high temperature tempering, steel must be hold at higher austenitizing temperature, about 1000~1050℃。

Tempreing Curve: