H13 STEEL

H13 tool steel is an excellent choice for hot work applications where durability and resistance to thermal fatigue are critical. Its properties make it a preferred material in the manufacturing of various tooling used in high-temperature environments.

Chemical Composition:

- Carbon (C): 0.32 - 0.45%

- Chromium (Cr): 4.75 - 5.50%

- Molybdenum (Mo): 1.10 - 1.75%

- Vanadium (V): 0.80 - 1.20%

- Manganese (Mn): 0.20 - 0.60%

- Silicon (Si): 0.80 - 1.20%

- Phosphorus (P): ≤ 0.03%

- Sulfur (S): ≤ 0.03%

Mechanical Properties:

- Hardness (HRC): 44 - 52 HRC (after heat treatment)

- Tensile Strength: Approximately 1,500 - 1,800 MPa

- Yield Strength: Approx. 1,200 MPa

- Elongation: 10 - 12%

Physical Properties:

- Density: Approximately 7.8 g/cm³

- Thermal Conductivity: About 25 W/m·K

- Modulus of Elasticity: Approximately 210 GPa

Applications:

- H13 steel is commonly used for:

  - Hot work dies and molds

  - Extrusion dies

  - Forging dies

  - Punches and other high-temperature tooling applications

Heat Treatment:

- Hardening: Austenitize at 1000 - 1050°C, followed by oil or air quenching.

- Tempering: Typically tempered at 500 - 600°C to achieve the desired balance of hardness and toughness.

Machinability:

- H13 offers moderate machinability; carbide tools are recommended for best results. Utilizing cutting fluids can improve machining efficiency.

Welding:

- Welding H13 can be challenging due to its high carbon and chromium content. If necessary, use preheating and low-hydrogen filler materials to minimize cracking.

Key Advantages:

- Excellent wear resistance and toughness

- High temperature strength and stability

- Good thermal conductivity