H13 Plastic Steel Mould Bar For Die Industry

Product Description

H13 is a type of hot work tool steel known for its excellent properties when used in plastic molding and die casting applications. Here's a detailed description:

Composition

H13 steel typically contains:

- Carbon (C) 0.32% - 0.45%

- Chromium (Cr) 4.75% - 5.50%

- Molybdenum (Mo) 1.10% - 1.75%

- Vanadium (V) 0.80% - 1.20%

- Other elements Small amounts of manganese, silicon, and sometimes sulfur and phosphorus.

Properties

- Hardness Can be hardened to around 50-55 HRC (Rockwell Hardness Scale).

- Thermal Conductivity Good thermal conductivity helps in maintaining a consistent temperature during the molding process.

- Toughness H13 steel is tough and resistant to thermal fatigue, which reduces the risk of cracking under repeated heating and cooling cycles.

- Wear Resistance It has good wear resistance, making it suitable for high-volume molding applications where abrasion is a concern.

- Heat Resistance Designed to withstand high temperatures, it maintains its hardness and mechanical properties even at elevated temperatures.

- Machinability H13 can be machined relatively well, although it™s generally harder to machine than some other tool steels.

Applications

- Plastic Molds H13 is commonly used for making molds for plastic injection molding due to its ability to withstand high temperatures and repeated thermal cycles.

- Die Casting Suitable for dies in high-pressure die casting processes, particularly for aluminum and zinc alloys.

- Hot Forging Dies Used in hot forging applications because of its resistance to thermal fatigue.

Heat Treatment

H13 steel is typically heat treated to enhance its properties:

- Pre-Heat Treatment Usually involves heating to around 800-850C to relieve stresses and refine the microstructure.

- Hardening Heat to 1000-1050C and then quench in oil or air.

- Tempering After hardening, tempering is performed at around 500-600C to achieve the desired balance of hardness and toughness.

Advantages

- High resistance to thermal fatigue and cracking.

- Good dimensional stability.

- Excellent resistance to wear and abrasion.

- Suitable for high-temperature applications.

Disadvantages

- Higher cost compared to some other tool steels.

- Requires precise heat treatment to achieve optimal properties.

Overall, H13 is a versatile and reliable material for demanding hot work applications, providing a balance of toughness, hardness, and thermal resistance.