AISI A 6 Air Hardening Tool Steel

The D. B. & S. Steel A 6 product is a fine-grained, superior quality electric furnace, low temperature, air hardening tool steel. It retains it air-hardening characteristics even though it has exceptional machinability.  The A 6 steel is a balanced combination of carbon, manganese, chromium and molybdenum. These elements produce an improved type of air-hardening die steel perfect for die shapes, thread rolling dies, slitters, gages and machine ways. The A 6 material is capable of being hardened from a low temperature such as was formally restricted to many of the oil-hardening grades.


Typical applications include:

-  Blanking dies  
-  Knurls   
-  Rolls
-  Brick and mold Liners
-  Mandrels  
-  Sand Slingers
-  Coining dies  
-  Master hobs  
-  Shear knives
-  Cold forming tools 
-  Molds   
-  Slitter knives
-  Forming dies      
-  Spindles

The chemical composition of the D. B. & S Steel grade A - 6 ground flat stock falls within ranges that are rigidly monitored. These chemical ranges are shown below *


Hardening

Rate of Heating:

 Slowly

Preheat Temperature:

1, 200 F (649) C

Hardening Temperature:

1,525 1,600 F  (829 871) C

Time at Temperature

Minutes 20-45

Quenching Medium: 

Air

Tempering

Tempering Temperature:

300 800 F   (149 427) C

Approximate Tempered Hardness:

HRC     54 - 60

Attributes

WEAR RESISTANCE

MEDIUM TO HIGH

TOUGHNESS 

MEDIUM

RESISTANCE TO SOFTENING

MEDIUM

DEPTH OF HARDENING

DEEP

MACHINABILITY

LOW TO MEDIUM

GRINDABILITY

MEDIUM

DISTORTION IN HEAT-TREATING

LOWEST

RESISTANCE TO CRACKING

HIGHEST

RESISTANCE TO DECARBURIZATION

MEDUIM  TO HIGH



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