P20 Tool Steel

P20 mold steel
P20 steel plate
A 6635 kg piece of Mould Steel ready to ship from Otai Steel
P20 tool steel

OTAI SPECIAL STEEL is ASTM P20 Tool Steel stockholders and suppliers from china. we have more?our 16 years experience in special steel supply.

ASTM P20 ?Steel is a good quality plastic tool?steel, P20 steel belong to the high quality medium carbon,Pre-hardness(28~34HRc) plastic mould steel. It no need further heat treatment. so you don’t have any?worry about distortion or cracking.

P20 tool steel?properties is very simliar with GB?3Cr2Mo, ?IOS?35CrMo2, DIN 1.2311 steel. At?most work?environment, ?P20 steel is?equivalent with 1.2311, 35CrMo2, 3Cr2Mo mold steel.

P20 steel properties Related Specifications ASTM A681-1999 | JIS G4404(2000) | GB 1299 ?P20 Tool Steel Data PDF files Down

Chemical composition

C(%) 0.28~0.40 Si(%) 0.20~0.80 Mn(%) 0.60~1.00
P(%) ≤0.030 S(%) ≤0.030 ?Cr(%) 1.40~2.00
?Mo(%) 0.30~0.55

Form of Supply

ASTM P20 tool?steel, we can supply the p20 steel round bar, ?steel flat bar, steel plate, hexagonal steel bar and steel square block. P20 steel Round bar?can be sawn to your required lengths as one offs or multiple cut pieces. Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.


ASTM P20 Tool steel is a?American plastic Die steel material, the steel by “super clean” production process, pre hardened, showing the height of micro pure and excellent homogeneous structure, excellent polishing and light etching engraving. After heat treatment, processing and polishing performance is good, can be carried out, and can be processed, suitable for the surface treatment of chrome, material hardness, good toughness, good mechanical processing performance. Gold microstructure is martensite and bainite structure.Main be?applied to?in plastic steel mold. like car?injection moulding, PVC?plastic injection molding.

Regular size and Tolerance

Steel round bar: Diameter ? 5mm – 3000mm

Steel plate: Thickness 5mm – 3000mm x Width 100mm – 3500mm

Steel Flat?bar: 5mm – 105mm

1) Hot Rolled round bar
Diameter Tolerance
Diameter Tolerance
≤12.70 -0.13 ~0.30 >50.80~63.5 -0.25~0.76
12.7~25.40 -0.13~0.41 >63.50~76.20 -0.25~1.02
>25.4~38.10 -0.15~0.51 >76.20~101.60 -0.30~+1.27
>38.1~50.80 -0.20~0.64 >101.60~203.20 -0.38~3.81
2) Hot Rolled steel plate
Thickness Tolerance
Thickness Tolerance
≤25.4 -0.41~0.79 >127~152 -1.60~2.39
>25.4~76 -0.79~1.19 >178~254 -1.98~3.18
>76~127 -1.19~1.60 >254~305 -2.39~3.96

Others have not specified size, pls contact our?experienced sales team.


P20?tool steel round bar and flat sections can be cut to your required sizes. P20?tool steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. P20?tool steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

Forging of Plastic mould steel?AISI P20 steel material

Slowly Heat to 930-1050 °C, keep the temperature to heat thoroughly. Start forging. Finished cool slowly.

Annealing of Din P20 plastic mold?tool steel material

Heat to 775 to?790 °C, soak enough time, ensure heat thoroughly. then cool?in?the ?heat treatment furnace.

Quenching of p20?material

820-840°C, quench in oil. get p20 steel material hardness 28~34HRc

Tempering of P20?plastic mold steel grade material

Heat uniformly at the tempering temperature for P20?tool steel material. keep enough time, then cool in air

Advice temperature 100 to 600 °C. more P20 mold?tool steel heat treatment data, pls contact your heat treatment supplier,.

Contact our experienced sales team to help you with your P20 Tool steel questions

by?Email or Telphone.?The P20 Steel questions will be reply in 24 hours.

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