Alloys Steel – P20+NI / 1.2738 | Din 1.2738 | X40CrMnNiMo8-6-4 | AISI P20+Ni

P20+Ni / 1.2738 Plastic Mould Steel

Chrome-manganese-nickel-molybdenum steel for hardening in air or in oil with good hardenability and good firmness during the heat. It is well-workable during the heat and well-workable in the soft-annealed state and it has good polishability. The steel has a high ability of the heat treatment into big depths (better than DIN 1.2311) with the balanced process of firmness around the whole cross-section. It is appropriate for nitriding and hard-chroming.

DIN 2738 is upgrade version of plastic mold steel 0f 2311, which normally supply in Pre hardened condition. Hardness in as supplied condition 280-320 HB. The additional nickel content of 1 % increases through hardening. It is micro-alloyed. It has good machinability, suitable for texturing, outstanding polishability, adequate corrosion resistance. vacuum-degassed steel with the following excellent features.

Chemical Composition

The chemical composition of P20 tool steels is outlined in the following table..

Element	Content (%)
C	0.35-0.45
Mn	1.30-1.60
Si	0.20-0.40
Cr	1.80-2.10
Mo	0.15-0.25
Ni	0.90-1.20
P	≤0.030
S	≤0.030

Soft annealing

Temperature(°C)	Cooling	Hardness
710 – 740	furnace	max. 235 HB

Forging

Temperature(°C)	Cooling
850 – 1050	furnace

Hardening

Temperature(°C)	Cooling	Tempering
840 – 870	oil or air	see tempering diagram

Applications

For Injection moulds for thermoplastics, extrusion dies for thermoplastics, plastic piping & plumbing injection molds. Blow molds, forming tools, press – brake dies (possibly flame hardened or nitrided ). Aluminium die casting prototype dies, structural components, shafts. Pet preform mold, Standard Mould Base, Compression Mould for SMC, Cavitations Molds.

P20 + NI applicable for large & small plastic mould dies for Automotive Industries, Dies for Domestic goods , High finishing plastic Die, Boaster Plates of Presses, Die Holders & Shoe blocks for drop Hammers, Press Cassettes , Upsetter Blocker, forging dies, Different dies & mold for plastic products etc.

Heat Treatment

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

Specification

Din 1.2738
X40CrMnNiMo8-6-4
AISI P20+Ni