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P20 / AISI P20 / DIN 1.2311

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Description

Standards : 40CrMnNiMo8-6-4

P20

DIN 2311
AISI P20

AFNOR Z210CW12-01

C Si Mn P S Cr Mo
0.35 – 0.45 0.20 – 0.40 1.30 – 1.60 0.03 0.03 1.80 – 2.10 0.15 – 0.25

 

Grade Brief:

P20 is an alloy tool steel with good machining ability even when hardened and tempered (Brinell 300). This steel has a polished surface and is one of the most regularly used requirements for machine cut plastic molds and casting dies. P20 is frequently hardened and tempered, ready for machining. It provides great wear resistance in this form, however if maximal surface hardness is required for compression molding plastic dies or similar equipment, the steel can be case hardened. A higher Sulfur variant, P20S, is offered for improved machinability.

 


Mode of Supply

HD-Industries is the largest stockiest and supplier of P20 Steel in flat, square and round bar. We provide steel in all sizes as your requirements. P20 die steel is available in flat, square and round shape. Consult our team who will assist you for P20 steel query.

 

P20-steel

 

Steel Properties

P20 / DIN 2311 /AISI P20 is the Pre Hardened Plastic mould steel hardness distributed evenly in large cross sections that have excellent weldability with least hardness elevation, good mirror polishability and less streak texture making finishing easier. Size Section availability upto 255mm thickness. Supply hardness is 240-280 BHN.

 

Mechanical Properties:

 

Tensile Strength 965-1030 MPa
Yield Strength 827-862 MPa
Hardness 30 HRC
Elongation 20%
Compressive Strength 862 MPa
Elastic Modulus 190-210 GPa

 

Physical Properties

Coefficient of thermal expansionat °C 20-100 20-150 20-200 20-250 20-300 20-350 20-400 20-450 20-500
10-6 m/(m*K) 12.7 12.8 13.1 13.3 13.6 13.7 13.8 14.0 14.3

 

Thermal Conductivity at °C 23 150 300 350 400 500
W/(m*K) 32.0 32.8 31.4 30.2 29.6 27.5

 

Heat Treatment & Processes:

Heat Treatment

During the carburizing process, P20 / DIN 2311 / AISI P20 tool steels are heated to 871-899°C (1600-1650°F) in the carburizing medium. After carburizing, these steels are heated to 816-871°C (1500-1600°F) to harden, then held for 15 minutes before being oil quenched.

 

Hardening:

Heat the steel consistently to 820-840°C until completely heated. Soak in oil to cool.

 

Forging:

Heat gently, giving the steel enough time to heat all the way through. start forging at 1050 degrees. Never forge below 930°C, reheating as needed. After forging, allow it to progressively cool.

 

Stress Relieving:

To reduce machining stresses when dies are substantially machined, stabilizing is advised right before finishing machining. 460° to 500° Celsius. Good soaking followed by air cooling is advised.

 

Normalizing:

Heating uniformly to 900°C for P20 / DIN 2311 / AISI P20 steel.

 

Annealing:

Heating consistently to 770–790°C for P20 / DIN 2311 / AISI P20 annealing. Good soaking, gentle cooling in the boiler.

 

Tempering:

Heat evenly and soak for at least one hour for every 25mm of section at the tempering temperature. Allow it to cool in a cool air.

 

Welding:

P20 / DIN 2311 / AISI P20 tool steels are welded using traditional techniques.

 

Soft annealing °C Cooling Hardness HB
710 – 740 Furnace max. 235

 

Hardening °C Quenching Hardness after quenching HRC
850 – 880 Oil or saltbath, 180 – 220 °C 52

 

Tempering °C after Quenching 100 200 300 400 500 600 700
HRC 52 50.5 48.5 46 42 36.5 28

DIN 2344
H13

 

Application

Plastic mould steel equivalent to P20/ DIN 2311 / AISI P20 use for die holders, zinc die, casting dies, backers, bolsters, injection moulds, mould frames for plastic moulds, Shoe Blocks, pressure casting moulds, recipient sleeves Etc.

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