Injection mold material: P20 steel

author: Universe plastic

2024-08-14

P20 steel is a commonly used tool steel material for manufacturing injection molds. It has good mechanical properties and processing properties and is widely used in plastic mold manufacturing with medium injection molding output.

It is relatively easy to process P20 steel, which can save processing costs. Universe Plastics engineers will take you to understand some of the performance characteristics of P20 steel to facilitate better selection and application in injection molding projects.

P20 steel composition performance parameters

Element	C: 0.38-0.45% Cr: 0.90-1.20% Ni: 1.00-1.50% Mn: 1.00-1.60% Si: 0.20-0.80% Mo: ≤0.20% P: ≤0.035% S: ≤0.035%	Elongation	15-20%
hardness	28-32 HRC	Impact toughness	good
tensile strength	700-850 MPa	Processability	good
Yield strength	500-600 MPa	heat treatment	need

Advantages of P20 steel injection mold

1. Good mechanical properties

P20 steel contains higher chromium and nickel, and has higher hardness and strength after heat treatment, which improves its wear resistance and toughness and can withstand high pressure during the injection molding process.

2. Excellent processing performance

Compared with other mold steels, P20 steel is easier to cut and mill during processing, and is suitable for manufacturing complex molds.

3. Stability

With proper heat treatment and surface treatment, P20 steel can provide stable performance and extend the service life of the mold.

4. Weldability

Generally better, but you need to pay attention to preheating and post-processing when welding to avoid cracks.

5. Corrosion resistance

P20 steel has certain corrosion resistance, but in order to extend the service life of the mold, surface treatment must be performed.

P20 Injection mold design and manufacturing considerations

1. Heat treatment

In order to ensure the performance of the mold, P20 steel molds usually require heat treatment processes such as annealing, quenching and tempering.

2. Surface treatment

Although P20 steel has certain corrosion resistance, in practical applications, in order to further improve its corrosion resistance and wear resistance, surface treatment, such as chromium plating or coating, may be required.

3. Cooling system

Properly designing the cooling system of the mold is crucial to maintaining the temperature balance of the mold and improving production efficiency.

Common applications of P20 steel injection molds

1. Medium-sized plastic parts: P20 steel is usually used to produce medium-sized injection molds, suitable for medium-scale production needs.

2. Auto parts: Some auto parts and exterior parts molds also use P20 steel because it can withstand a certain amount of pressure and wear.

3. Consumer products: P20 steel is also commonly used in molds for home appliances, electronic product casings and accessories.

4. Medical equipment: P20 steel is also used in the plastic component molds of some medical equipment.

Summarize

P20 steel is a steel suitable for a variety of plastic mold applications and excels particularly in mold manufacturing with medium production volumes and requirements. But for more demanding molds, other types of steel or alloys may be needed.

Dongguan Universe Plastic Factory has more than 15 years of experience in manufacturing injection molds, a professional team, advanced processing equipment and high-quality P20 steel supply channels.

If you are choosing a P20 injection mold manufacturer, welcome to contact us to get the latest quotation.

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