P-20 is a modified pre-hardened mold steel with an alloy content aproximately comprising: 0.30 +/- 0.05% Carbon, 0.60 +/- 0.05% Manganese, 0.50 +/- 0.035% Silicon, 3.75 +/- 0.15% Chrome, 1.00 +/- 0.10% Molybdenum, 0.50 +/- 0.10% Nickel, 0.100 max. Sulfur, 0.035 max. Phosphorous, 0.15 min. Tungsten and 0.20 min. Vanadium. It is a chromium-molybdenum-nickel steel with improved machinability and improved formability.
This modified P-20 has many performance benefits. The additional vanadium, tungsten and molybdenum further boosts the toughness and hardenability when compared to other P-20 alloys so it is suitable for larger and more complex tools with longer production runs. Increased manganese content improves the water-resisting functions so you dont need to worry about corrosion. The sulfur content is kept to a minimum, improving the machining of the steel with minimal distortion. The low nickel content provides a good balance between toughness and strength. The combination of carbon, nickel and chromium provides excellent heat treatment properties resulting in a good wear resistance and higher compressive strength then similar alloy grades.
P-20 is a low carbon steel which is used for low to medium force tools such as molds and dies. Depending on the application and design of the tool, the hardness of the steel can range from 25/29 to 45/50 Rc (Rockwell C-scale). Higher hardness is preferred in making tools that require a longer life due to the higher wear resistance.
The high alloy content of P-20 makes it an excellent choice for plastic injection molds and blow molding applications. The higher hardness provides greater wear resitance, increased tool life and better surface finish of the molded parts. Other benefits of this high alloy content include improved toughness and hardenability, improved machinability and improved formability.
P-20 is ideal for plastic injection and blow molds, rubber molds, and jigs and fixtures. With its superior machining properties, P-20 also offers an advantage in die casting processes. The lower hardness and uniformity of P-20 also offers easy weldability and brazing for repairs to damaged tools.
P-20 is a versatile, low carbon mold steel which can be supplied in the pre-hardened condition and ready for machining. With its excellent performance benefits, this steel is an ideal choice for a wide range of plastic injection, blow molds and jigs and fixture applications.
