AISI D - 2 Wear Resistant Air Hardened Tool Steel

The cold work tool steel listed under the symbol "D" are all characterized by high carbon content. Our D 2 grade is a fine quality of tool steel that is air hardening and therefore offers a high degree of dimensional stability in heat treatment. Its high carbon and vanadium content provides for its excellent wear and abrasion resistance qualities.  If your application is demanding, our D -2 should be considered due to its hardness.  It is free of decarb and other surface imperfections. Its low sulphur content makes it non-free machining.
 
Typical applications include:
-  Blanking dies   
-  Gages   
-  Rolls
-  Brick mold liners  
-  Knurls   
-  Sand slingers
-  Burnishing tools  
-  Lamination dies 
-  Shear knives
-  Cold forming dies  
-  Punches  
-  Slitter knives
-  Drawing dies 


The chemical composition of the D. B. & S Steel grade D - 2 ground flat stock falls within ranges that are rigidly monitored. These chemical ranges are shown below *


Hardening

Rate of Heating:

Very Slowly  

Preheat Temperature:

1,500 F (816) C

Hardening Temperature:

1,800 1,875 F  (982 1024) C

Time at Temperature

Minutes 15-45

Quenching Medium: 

Air

Tempering

Tempering Temperature:

400 1,000 F    (204 538) C

Approximate Tempered Hardness:

HRC     54 - 61

Attributes

WEAR RESISTANCE

HIGH  TO VERY HIGH

TOUGHNESS 

LOW

RESISTANCE TO SOFTENING

MEDIUM TO HIGH

DEPTH OF HARDENING

DEEP

MACHINABILITY

LOW

GRINDABILITY

LOW

DISTORTION IN HEAT-TREATING

LOWEST

RESISTANCE TO CRACKING

HIGHEST

RESISTANCE TO DECARBURIZATION

MEDUIM


*Source: Steel Products Manual "TOOL STEELS" a publication of the Iron and Steel  Society  - June 2000