Characteristics of H13 Hot Work Mold Steel
1. Excellent High-Temperature Performance
High-Temperature Strength and Stability: H13 steel maintains high strength and hardness even at 600°C, with significantly superior thermal strength compared to ordinary carbon steel and low-alloy steel, making it suitable for long-term high-temperature operations.
Thermal Fatigue Resistance: H13 steel effectively resists thermal cracking during repeated heating and cooling cycles, extending mold service life.
Softening Resistance: It can be used for extended periods below 540°C. Although hardness decreases above 540°C, it still outperforms most hot work tool steels.
2. Superior Mechanical Properties
High Toughness and Ductility: H13 steel exhibits excellent impact resistance, with an elongation after fracture ≥40% and a reduction in area ≥60%, effectively absorbing impact energy and preventing brittle fracture.
High Hardness and Wear Resistance: After heat treatment, its hardness reaches 50-52HRC. Surface hardness can be further enhanced to 62-63HRC through carburizing or nitriding processes, significantly improving wear resistance.
Uniform Machinability: The material has a homogeneous structure with minimal segregation, facilitating easy cutting, grinding, and electrical discharge machining (EDM) while ensuring high-quality surface finishes.
3. Reliable Corrosion Resistance
Oxidation Resistance: With chromium (Cr 4.75-5.50%) and silicon (Si 0.80-1.20%) content, H13 steel forms a dense oxide film in high-temperature oxidizing environments, slowing corrosion rates.
Environmental Corrosion Resistance: It offers good resistance to corrosive media such as sulfur and chlorine, making it suitable for harsh environments like petrochemical and marine engineering.
Hydrogen Corrosion Resistance: In high-temperature, high-pressure hydrogen environments, the material demonstrates high stability and is resistant to hydrogen embrittlement or hydrogen-induced cracking.
