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SKD61 STEEL

SKD61 STEEL

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1          Product charateristics                      

-           Exceptional toughness and red hardness                   

-           Heat crack and wear resitance                       

-           Anti-heat treatment transformation               

-           Suitable for hot die casting molds with its high vanadium content              

-           Suitable for aluminum and magnesium                     

2          Chemical Composition (JIS G4404)                      

Standard
(JIS G4404:2006)

Chemical Composition Rate ( Wt, % )

C

Si

Mn

P

S

Cr

Mo

V

SKD61

0.35

0.8

0.25

 

 

4.8

1

0.8

0.42

1.2

0.5

0.03

0.02

5.5

1.5

1.15

3. Physical properties                                                                                               

-           Thermal expension co-efficient: 12.5 ( 25~200˚C )                                                                                      

-           Specifice gravity: 7.8g/cm3                                                                                       

-           Heat Conductivity (W/mK): 24(20˚C)                                                                                              

-           Young's Modulus (GPa): 205                                                                                    

4. Heat treatment conditions                                                                                               

-           A temperature is set higher (+25 to 50˚C) than the operative temperature                                                                                       

-           When the temperature of solid solution rises, its hardness increases as well. The 2nd hardening occurs in the range from 400 to 530˚C                     

5. Heat treatment process   

Steel

Annealing

Quenching

Tempering

Hardness

Temperature

Temperature

 

Nhiệt độ

 

( HRC)

( °C)

( °C)

( °C)

 

SKD61

820~870

1000~1050

Air

550~650

Air

50~55

6. Heat treament method

Steel

Method

vacuum heat treatment

QT

Nitriding

Carburizing

SKD61

MAX:

MAX:

MAX:

NO

52-54 HRC

52-54 HRC

700-800 HV

7. Apllications                                   

  -         Molds for manucfacturing materials in hot state                               

  -         Used for hot die casting and extrusion molds                       

  -         Suitable for Aluminum and magnesium pressing dies