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Your present location:Home >> Products >> Plastic Mold Steel >> P20,1.2311 >> P20/1.2311 Plastic Mold Steel
  • Product Name: P20/1.2311 Plastic Mold Steel
  • Product ID: 201708301
  • Views : 403

Characteristics:

1. Widely applied plastic mould steel, good comprehensive mechanical properties, high hardenability, with uniformed hardness throughout the cross section of big-sized steel.

2. Good polishability, good toughness on the surface.

3. Delivered in prehardened condition, used directly to make mould, which can guarantee good usability and avoid the deformation in heat treatment.

 

Chemical Composition:

C

Si

Mn

P

S

Cr

Mo

0.28-0.40

0.20-0.80

0.60-1.00

0.030

0.030

1.40-2.00

0.30-0.55

 

Application:

1.Making medium or large sized high preciseness plastic moulds with long life span.

2.Making low melting point alloyed die-casting moulds(like tin, zinc, lead).

 

Delivery condition: Prehardening, hardness 28-35HRC. Black, rough machined, turned, or as per customers' requirement.

 

Specification: Round bars and flats with various sizes are available in accordance with customers’ requirement.

 

 

Forging Technique:

Heating temperature/

Initial forging temperature/

Final forging temperature/

Cooling

1120-1160

1070-1110

850

Sand cooling or retarded cooling

 

Heat treatment technique:

Item

Annealing

Quenching

Tempering

 temperature/

760-790

850-880

580-640

cooling

 Furnace cooling500 air cooling out of the furnace

 Oil cooling

air cooling

 hardness

150-180HBS

 

28-35HRC

 

P20 is an alloy tool steel which offers good machineability even in the hardened and tempered (Brinell 300) condition. This steel gives an excellent polished finish and is one of the most widely accepted specifications for machine cut plastic moulds and casting dies. P20 is often supplied in the hardened and tempered condition ready for machining. In this condition it gives excellent wear resistance but if maximum surface hardness is required for compression moulding plastic dies or similar tools, the steel can be case hardened or nitrided. For better machinability a higher sulphur version P20+S is available. For improved through hardenability in larger sections we also offer 1.2738.