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Technical
Information on D-3 Tool Steel
 | D-3is an air-hardening, high
carbon/chromium steel with high hardness and resistance to abrasion. D-3 is also stable in
heat treat. Typical analysis is shown in the chart below.
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| Carbon |
Manganese |
Phosphorous |
Sulfur |
Silicon |
Chromium |
Tungsten |
Vanadium |
| 2.00% |
0.60% max |
.030% max |
.030% max |
.60% max |
11.00% - 13.5% |
1.00% max. |
1.00% max |
| D-3 is used in applications requiring sharp
cutting edges, wear and compressive strength. Typical applications are
 | Shingle Knives |
| Slitter Knives |
| Planer Knives |
| Shear Knives |
| Plastic Granulator Knives |
| Punches |
| Dies |
| Form Rolls |
| Rolls |
| Thread Roll Dies |
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| Heat Treatment:
| Forging:
 | Preheat slowly to 1200°F - 1250°F until piece
is thoroughly heated through, then increase heat to 1850°F - 2000°F. |
| DO NOT hot work D-3 below 1700°F - reheat as
necessary. |
| DO NOT Normalize. |
| Anneal as soon as possible. |
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| Annealing:
| Surface Protection - Anneal in Controlled
atmosphere furnace or pack in an inert material. |
| Slowly heat D-3 to 1600° - 1650°F. |
| Allow to cool at rate of 20°F per hour to
900°F. |
| Slowly cool in furnace. |
| Annealed hardness is a maximum 255 Brinell. |
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| Hardening:
| Pack in inert material or use controlled
atmosphere furnace. |
| Pre-heat slowly to 1500°F, and ensure equal
temperature throughout the piece. |
| Increase heat more rapidly to 1700°F -
1800°F. |
| Hold steel at temperature for one hour per inch
of maximum thickness. |
| Remove the piece from the furnace (or the
container, if packed), allow to cool in still air or for maximum hardness, quench in
150°F oil. Temper at once. |
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| Tempering:
| Temper immediately before piece cools to
150°F. |
| D-3 parts should be double-tempered and held a
minimum of 2 hours/inch thickness. |
| Tempering range...300°F/550°F. |
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For More Information please call or fax us at
800-654-2901 (fax) 860-684-6354
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