1.2311 (P20) is a popular pre-hardened plastic mold steel known for its good machinability, uniform hardness, and excellent polishability. It is commonly used in the manufacturing of plastic injection molds, die casting dies, and other tooling applications. The steel is supplied in a pre-hardened condition, usually around 280-325 HB (30-34 HRC), eliminating the need for further heat treatment and making it ready for immediate use.
Key Characteristics:
Composition: Mainly includes carbon, chromium, and molybdenum, which provide a balance of strength, toughness, and wear resistance.
Hardness: Pre-hardened to approximately 30-34 HRC, suitable for mold making without additional heat treatment.
Machinability: Good machinability due to its pre-hardened state, allowing for easier and quicker mold manufacturing.
Polishability: Excellent, which is ideal for producing molds with high surface finish requirements.
Toughness: Good toughness and resistance to thermal fatigue, making it suitable for long production runs.
Common Applications:
Plastic injection molds
Die casting dies for light alloys
Blow molds
Mold bases and frames
Tools for press molding
1.2311 (P20) steel is highly valued in the tool and mold industry for its combination of hardness, machinability, and resistance to wear, making it a reliable choice for producing high-quality molds and dies with extended service life.