Plastic Mould Steel Bars

Product Details:

• Low-carbon mold steels or group P steels are of different types that include P2, P3, P4, P5, P6, P20, and P21 steels.
• Chromium and nickel are the main alloying elements found in group P steels.
• P20 tool steels are nitrided or carburized.
• These steels are capable of being machined into complex and large dies and molds.
• P20 steels are mostly used in the carburized condition.
• The presence of chromium and nickel enhances the toughness and hardness of P20 steels.

Equivalent materials to P20 tool steels are:

• DIN 1.2330
• UNS T51620
• ASTM A681

• This alloy is in the category generally labeled as Mold Steels.
• Nickel and chromium are the alloying elements for hardness and toughness.
• This alloy is most often used in the carburized condition.

• P20 tool steels are tempered at 482-593°C (900 to 1100°F) for a Rockwell C hardness of 37 to 28.

• Annealing takes place at 760-788°C (1400 to 1450°F) and then the steels are cooled slowly in the furnace at a temperature less than 4°C (40°F) per hour.

• P20 tool steels are capable of being readily cold worked by using conventional tooling methods with the alloy in the annealed condition.

• P20 tool steels are forged at 1093°C (2000°F) down to 899°C (1650°F).
• Forging below 871°C (1600°F) is not recommended for these steels.

• Conventional methods are used for welding of P20 tool steels.

• P20 tool steels are heated to 871-899°C (1600-1650°F) in the carburizing medium during the carburizing process.
• After being carburized, these steels are heated to 816-871°C (1500-1600°F) in order to be hardened and then held for 15 minutes and finally oil quenched.

The thermal properties of P20 tool steels are given in the following table:

The following table shows the physical properties of P20 tool steels.

The mechanical properties of P20 tool steels are displayed in the following table.