D-2

*Always consult your Heat Treater*
      *Information Provided is General*
 

D-2 is an air-hardening, high carbon-high chromium die steel well suited for long run tool and die applications. An abundance of extremely hard, wear resisting alloy carbide particles imparts excellent abrasion resistance qualities. These carbides are well dispersed resulting in consistent response of the steel during all machining, heat-treating, and production operations.

D-2 should be preheated at 1300 – 1400°F, then transferred to a furnace at 1850 – 1875°F. If furnace hardening uses a soak time of 30 minutes for parts over 1 inch or less and add 15 minutes for each inch in thickness over 1 inch. After air-cooling from the hardening furnace or salt bath, temper D-2 tools as soon as they have reached room temperature. For many applications, D-2 is tempered between 500 – 550°F. This temper produces a good balance between toughness and wear resistance, and normally produces hardness in the range of Rockwell C 57-59. This tempering range is recommended for blanking, forming, and coining dies and other tools requiring a good hardness-toughness balance. Where maximum abrasion resistance is desired, as in bench draw dies, cold extrusion tools, and gages, a lower temper in the 300 – 350°F range is recommended. For semi-hot work applications, a temper in the secondary hardness range of 950 – 1000°F is recommended.

Temper large tools and dies a minimum of 2 hours per inch (25.4mm) of thickness. Double tempering is beneficial temperatures in the secondary range. Hardening happens between 1850 – 1900°F. 

D-2 is an oversized material.

 Flats

  •  + .015 up to .040 on thickness 

  •  + .080 up to .125 on width

 Rounds

  •  Up to 1″ + .007 up to .018

  •  1″ up to 6″ + .015 up to .040

  •  6″ and up + .0625 up to .250

 Hardening Temp: 1850°F through 1900°F

 Quench Medium: Air Salt Bath

 Tempering Range: 400°F through 1000°F

 Typical Hardness Level: 58 to 62 R/C

 Preheat Forging: 1450°F through 1500°F

 Forging Temp: 2000° through 2100°F

 Anneal Temp: 1650°F

 Anneal Cooling Method:  Furnace-cool to 1000°F at 100°F per hr., then  air cool

 Anneal Hardness: 255 BHN

 

 D-2 Material in Stock

 Color code:    WHITE 

 Flat Dimensions: 

  • ½” x 5/8″ up to 6″ x 6″

  • Non-standard sizes, quoted upon request

 Round Dimensions:

  • 3/8″ up to 15 ½”

  • Non-standard sizes, quoted upon request

 D-2 Typical Analysis:

C

MN

Si

CR

V

Mo

1.50

.30

.30

12.00

.90

.75

 · Slight variations from typical analysis shown may occur in order    to maintain the desired graphitizing potential.