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P20 Plastic Mould Steel Round Bar
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P20 Tool Steel:
|Single Piece Length||3-6 meter|
|Material||Plastic Mould Steel|
- 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:
Principal Design Features:
- 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:
T (°C) Treatment
|Thermal expansion 12.8 x 10-6/ºC
The following table shows the physical properties of P20 tool steels.
The mechanical properties of P20 tool steels are displayed in the following table.
|Hardness, Brinell (typical)
|Hardness, Rockwell C (typical)
|Tensile strength, ultimate
|Tensile strength, yield
|Elongation at break (in 50 mm (2"))
|Charpy impact (V-Notch)