45# mold steel is a commonly used tool steel with high hardness, wear resistance, and heat resistance. It is mainly used for manufacturing molds and tools such as stamping dies, plastic molds, cold heading dies, and cold punching dies. The following will provide a detailed introduction to the characteristics, chemical composition, mechanical properties, and applications of 45# mold steel.
I. Characteristics:
High Hardness: 45# mold steel has high hardness that can be further increased through heat treatment, reaching 60-62HRC. Wear Resistance: It possesses good wear resistance, maintaining good cutting performance over extended periods of use. Heat Resistance: 45# mold steel exhibits good heat resistance, maintaining hardness and strength in high-temperature environments. Machinability: It has good machinability, allowing for cutting, cold heading, grinding, and other processing techniques.
II. Chemical Composition:
The chemical composition of 45# mold steel mainly includes elements such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), with specific percentages as follows:
Carbon (C): 0.42-0.50%
Silicon (Si): 0.17-0.37%
Manganese (Mn): 0.50-0.80%
Phosphorus (P): ≤0.035%
Sulfur (S): ≤0.035%
III. Mechanical Properties:
The mechanical properties of 45# mold steel include hardness, tensile strength, yield strength, elongation, and other indicators, with specific values as follows:
Hardness: ≥207HB
Tensile Strength: ≥600MPa
Yield Strength: ≥355MPa
Elongation: ≥16%
IV. Applications:
45# mold steel is widely used in the manufacturing of molds and tools, primarily in the following areas:
Stamping Dies: Suitable for manufacturing stamping dies such as automotive parts molds and household appliance molds due to its high hardness and wear resistance.
Plastic Molds: Ideal for plastic molds like injection molds and extrusion molds because of its good heat resistance and wear resistance.
Cold Heading Dies: Suitable for producing cold heading dies like thread cold heading dies and wire cold heading dies due to its good machinability and wear resistance.
Cold Punching Dies: Applicable for manufacturing cold punching dies like punching dies and shearing dies because of its high hardness and strength.
In summary, 45# mold steel is a commonly used tool steel known for its high hardness, wear resistance, and heat resistance. Its chemical composition includes elements like carbon, silicon, manganese, phosphorus, and sulfur, while its mechanical properties demonstrate high hardness, tensile strength, and yield strength. 45# mold steel finds wide applications in the manufacturing of molds and tools, including stamping dies, plastic molds, cold heading dies, and cold punching dies.
