Technical Information: Graphite Die Casting for Metal Components

How, When & Why to Use It:

  1. To produce precision and premium quality aluminum and zinc castings with the exact properties of die castings.
  2. For aesthetic applications where appearance is critical.
  3. Prototyping - to assist engineering in debugging design before committing to hard tooling.
  4. For low volume applications where quantities do not justify production die cast tooling.
  5. For castings with thin walls or where weight is critical.
  6. To functionally test die castings prior to investing in hard tooling.
  7. Tooling is low cost and allows ease of modification.
  8. To reduce "time to market" on new programs and evaluate market potential.
  9. To reduce time for machining and secondary operations.
  10. To fill the gap if dies are lost, damaged or delayed.
  11. To assist and reduce time for U.L. approval.
tensile strength of graphite mold parts
yield strength of graphite mold parts
brinell hardness of graphite mold parts

Design & Technical Information


Less than 14 x 14 x 14 inches.


63 micro-inch.

Wall thickness

>0.100 inch.

General tolerances

+/- 0.005 inch plus 0.0015 in./inch


Aluminum and zinc alloys common to die casting.

- Aluminum: 356, 380 and 390
- Zinc (Zamac): ZA-3, ZA-8, ZA-12


Same as die cast parts.


Rule of thumb for complex shapes within a 14 in. cube:
Tooling: 25-30% of die cast tools.
Piece price: 5 times die casting price.


3 - 5 weeks for tooling
30 to 100 pieces cast per day

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