China Plastic Mould Tool Steel Hot Rolled Big Size 1.2738 P20+Ni 718

Plastic Mould Tool Steel Hot Rolled Big Size 1.2738 P20+Ni 718
Product Description
P20+Ni, 1.2738, 7183Cr2NiMnMo,

Characteristics

1. Widely used plastic mold steel with excellent comprehensive mechanical properties, high hardenability, uniformed hardness throughout section for large size steel after quenching and tempering.

2. With good polishing ability and low toughness.

3. To be used directly after pre-hardening, guarantee good usability and avoid deformation after heat treatment for the mold.

Applications

1. Suitable for making oversized or large size plastic molds with high precision and long service life.

2. Used for making low melting-pointed alloyed die casting moulds, like Tin, Zinc, Lead.
P20+Ni / 1.2738 / 718 / 3Cr2NiMnMo is a 300HB (30HRC) pre-hardened grade specially designed for plastic mold industry. Chromium, Molybdenum, Nickel carbon and manganese additions are optimized to have a fully martensite-bainite microstructure after quenching. The high nickel content (1%) is specially adapted to ensure a perfect homogeneity of structure and hardness through thickness even for very thick blocks (up to 700mm/28"). The steel is melted in electrical furnace and refined with VOD or DH device The cleanliness of the steel is guaranteed as well as the soundness. This makes the steel particularly well adapted for mold even when polishing or chemical etching are required for surface finish quality.
P20+Ni / 1.2738 / 718 / 3Cr2NiMnMo is specially used for Plastic injection die moulds. The characteristics of a material are right sharpening, photo-etching properties with high purity and good homogeneity. DIN 2738 is upgraded version of plastic mold steel 0f 2311, which normally supply in Pre hardened condition. Hardness in as supplied condition 280-320 HB with having uniform hardness. The additional nickel content of 1 % increases through hardening. It has good machinability, suitable for Texturing, fine polishability, adequate corrosion resistance, vacuum-degassed steel.

Chemical composition(%)

GradeCSiMnCrMoNiPS1.27380.32-0.400.20-0.401.10-1.501.70-2.000.25-0.400.85-1.15≤0.030≤0.030P20+Ni0.32-0.400.20-0.401.10-1.501.70-2.000.25-0.400.85-1.15≤0.030≤0.0307180.32-0.400.20-0.401.10-1.501.70-2.000.25-0.400.85-1.15≤0.030≤0.0303Cr2MnNiMo0.32-0.400.20-0.401.10-1.501.70-2.000.25-0.400.85-1.15≤0.030≤0.030

Delivery condition & time:

-EAF+LF+VD, Hot rolled, Black surface or Machined, Quenching + Tempering, Hardness 28-34HRC or

30-36HRC or as customized, UT 100% Passed

-For abundant stock, 15-20 days.For customized products, 30-50 days.

Strength:
-Specialisation in quality steels
-Steels ready in stock to guarantee the rapid delivery
-Proximity to customers in space and time
-Professionalism of our team
Quality:
-We are well equipped with laboratory for ultrasonic testing, spectrographical analysis, hardness testing.
-Every batch of products is individually tested on different parameters such as hardness, metallurgical structure and ultrasonic requirements.