1.Specification of machining d2 tool steel

         Round bar

Diameter(mm)

Length (mm)

20~800

300~5800

           Plate

Thickness(mm)   

Width (mm)        

Length (mm)     

Max:800

205~810

2000~4000

The specification can be customised!

2.Chemical compositon of machining d2 tool steel

NO.

C  

Mn

Si

Cr

Mo

V

P

   S

GB

Cr12Mo1V1

1.40~1.6

≤0.6

≤0.6

11~13

0.7~1.2

0.5~1.1

≤0.030

≤0.030

ASTM

D2

1.40~1.6

0.1~0.6

0.1~0.6

11~13

0.7~1.2

0.5~1.1

≤0.030

≤0.030

JIS

SKD11

1.40~1.6

≤0.6

≤0.4

11~13

0.8~1.2

0.2~0.5

≤0.030

≤0.030

EN ISO

X153CrMoV12

1.45~1.6

0.2~0.6

0.1~0.6

11~13

0.7~1.0

0.7~1.0

≤0.030

≤0.030

DIN

1.2379

1.50~1.6

0.15~0.5

0.1~0.4

11~13

0.6~0.8

0.9~1.1

≤0.030

≤0.030

3.Delivery condition of machining d2 tool steel

Standard Number

     Annealing

     Quenching

Cold drawn

GB

Cr12Mo1V1

≤255

≥59

ASTM

D2

≤255

≤269

JIS

SKD11

≤255

≥58

EN ISO

X153CrMoV12

≤255

≥61

DIN

1.2379

≤255

≥61

4.Heat treatment of machining d2 tool steel

Isothermal annealing:

-Heat to 870-880°C;

-Furnace cooling to 760°Cand hold at temperature for at least 10 hours;

-Cool by 10°C/h to 720°C;

-Cooling in air.

Stress relieving:

To be carried out after machining and before   the final heat treatment.

-Heat to 650-700°C, hold for 4/6 hours:

-Furnace cooling to 330-350°C;

-Cooling in air.

Hardening:

-Initial preheating to 350-450°C;

-Second preheating to 750-850°C

- Austenitizing at 1010-1040°Cor at 1080-1100°C;

-Cooling in air or in oil if large parts.

Tempering hardness: 62-66 HRC

Tempering:

    In   the temperature range 150÷300°Cwith minimum holding time 3 h. For parts hardened

at 1080÷1100°C, a first tempering will be carried out at   500÷550°Cin order to exploit secon

dary hardness, followed by a second tempering   at 180/300°C.

5.Characteristic of machining d2 tool steel
 
 

(1)Good quenching resistance, heat deformation   small, wear-resistant, impact resistant.

(2)Vacuum degassing refining processing pure steel.

(3)Spheroidizing softening process, good   cutting performance.

(4)Strengthen the elements vanadium, molybdenum   special join,

is extremely excellent in wear resistance.

6.Application of machining d2 tool steel

(1)Thickness of not more than 2MM sheet,   efficient blanking die, punch die and pressure die etc.

(2)All kinds of scissors, inserts, woodworking   blade.

(3)Thread rolling die and wear-resistant   slider.

(4)Cold Heading Die, thermosetting resin   molding.

(5)Molding in deep drawing cold extrusion dies.

(6)For pounch mold,knife mold,screw   mold,chinaware mold