|Application||Automobile Industry, Enginerinng|
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.
The sections below provide an overview of P20 tool steels.Chemical Composition
The chemical composition of P20 tool steels is outlined in the following table..
The following table shows the physical properties of P20 tool steels.
|Density||7.85 g/cc||0.284 lb/in3|
The mechanical properties of P20 tool steels are displayed in the following table.
|Hardness, Brinell (typical)||300||33|
|Hardness, Rockwell C (typical)||30||30|
|Tensile strength, ultimate||965-1030 MPa||140000-150000 psi|
|Tensile strength, yield||827-862 MPa||120000-125000 psi|
|Elongation at break (in 50 mm (2"))||20.0%||20.0%|
|Compressive strength||862 MPa||125000 psi|
|Charpy impact (V-Notch)||27.1-33.9 J||20.0-25.0 ft-lb|
|Elastic modulus||190-210 GPa||27557-30457 ksi|