Thin-walled container molds must have high-end polish, as most the fast-food boxes are transparent. That is why we used H13 as the steel material for this thin-walled ice cream box. H13 steel is the most widely used and representative hot work die steel. Its main characteristics are: 1. It has high harden ability and high toughness. 2. Excellent thermal crack resistance, which can be water cooled in the workplace. 3. With medium wear resistance, carbonizing or Nitrogen processes can also be used to increase its surface hardness, but the thermal crack resistance should be slightly reduced. 4. Due to its low carbon content, the secondary hardening ability is poor in tempering. 5. It has anti-softening ability at higher temperatures, but the hardness will decrease rapidly when the use temperature is higher than 540 ° C (1000 ° F) (that is, the working temperature can be 540 ° C). 6. Small deformation during heat treatment. 7. Medium and high machinability. 8. Medium decarburization resistance.