D3 Tool Steel - High-Carbon / High-Chromium, Cold-Work Steel (UNS T30403)

AISI D3 alloy steel is heat treatable and will offer a hardness in the range 58-64 HRC. After heat treatment D3 tool steel is hard, durable and dense, and is immune from sinking in use. It offers a measure of corrosion resistance when polished. In general, the applications of AISI D3 tool steel resemble those of D2 tool steel but it should be remembered that alloy tool steel D3 has better wear resistance of the two steels and is preferred for such items as shear blades. Owing to its higher wear resistance, AISI / ASTM D3 cold work steel is slightly more difficult to grind than D2 steels.

1. Supply Range of AISI D3 Cold Work Steel

D3 Tool Steel Round Bar: diameter 8mm - 350mm
D3 Steel Plate: thickness 2mm -300mm x width 200mm - 800mm
D3 Steel Slab: 200mm x 500-800mm

Surface Finish: Black, Rough Machined,Turned or as per given requirements

3. D3 Cold Work Steel Chemical Composition and Equivalent Grades
 

4. Mechanical Properties of D3 Cold Work Steel

• Physical Properties

• Thermal Properties

5. Forging of D3 Cold Work Tool Steel

Pre-heat at 900-950°C then raise temperature to 1050-1100°C. Soak until uniformly heated. D3 tool steel is relatively hard at elevated temperature. Therefore, initial hammer blows must be light and the temperature must not be allowed to fall below 1020°C until the metal begins to flow. Final forging should not be done below 900°C.

AISI D3 Cold Work Steel has high strength, good hardenability and wear resistance. D3 is suitable for applications such as complex blanking and forming tools for long runs and for hard and abrasive materials.

Typical Applications:

• Highly stressed cutting
• Punching tools for thin sheets,
• Shear blades for cutting
• Profile rolls,
• Drawing and deep drawing tools,
• Stone processing tools,
• Knives for paper and plastics,
• Shear knives for thin sheets.
• Deep drawing,
• Pressure pads
• Highly wear-resistant plastic moulds.