High Quality Pre-hardened Engineering Tool Steel Bar P20 + Ni / 1.2738 / 718H
P20+Ni is pre-hardened plastic mold steel. It is used for large, precisionk high polishing plastic moulds, such as car accessories, household appliance, electromic and audio-video products.
Equivalent grades
| GB | DIN | AISI | ASSAB |
| 3Cr2NiMnMo | 1.2738 | P20+Ni | 718 |
Chemical Composition(%)
| C | Si | Mn | P | S | Cr | Mo | Ni |
| 0.28-0.40 | 0.20-0.80 | 0.60-1.00 | ≤0.03 | ≤0.015 | 1.40-2.00 | 0.30-0.55 | 0.80-1.20 |
Hardness: Pre-hardened 33-37 HRC
Available size(mm)
| Plate/Flat Bar Size(mm) | Round bar Size(mm) |
| Thickness | Width | Length | Diameter | Length |
| 10-1100 | 155-2200 | 2000-6000 | 20-200 | 2000-6000 |
Features
1. Material hardness uniformity
2. Excellent polishing performance
3. Good machinability
4. Pre-hardened plastic mold steel
5. Can be nitriding
6. Suitable surface treatment, such as: plating Cr
Applications
1. Dermatoglyphics, pear skin pattern, imitation stone pattern etching.
2. Transparent plastic, such as stationery boxes, daily necessities containers high gloss more requirements.
3. Especially suitable for hard plastic (PS) and no plastic pieces (ABS) parts.
4. Car bumpers, interior parts, refrigerators, air conditioners and other large production requirements of large mold.
More about P20+Ni engineering tool steel bar
P20+Ni engineering steel is a mold steel material produced according to the German DIN standard.
It has relatively superior mechanical properties and good workability in similar grades of steel. It is mainly used for the processing and production of hot-working molds, of which plastic molds are the most widely used .
In addition, the special pre-hardened steel to the factory when it has a good hardness, can reduce the normal mold processing and heat production process, improve economic efficiency.
Physical properties
(Sample hardness 340HBW, at room temperature and high temperature conditions)
1) Temperature 20 ° C / 200 ° C / 400 ° C, density 7. 8g / cm / 7.75g / cm / 7. 7g / cm.
2) temperature 20 ~ 200 ° C / 20 ~ 400 ° C, linear expansion coefficient: 12.6 × 10K / 13.5 × 10K.
3) the temperature is 20 ° C / 200 ° C / 400 ° C, the thermal conductivity is 29.0 W · (m · K) /29.5W · (m · K) /31.0W · (m · K)
4) Temperature 20 ° C / 200 ° C / 400 ° C, Modulus of Elasticity: 205000 MPa / 200000 MPa / 185000 MPa
Mechanical properties
(Sample hardness 340HBW)
1) Temperature 20 ° C / 200 ° C / 400 ° C, Tensile strength 1100MPa / 1050MP8 / 850MPa.
2) temperature 20 ° C / 200 ° C / 400 ° C, conditional yield strength 980MPa / 925MPa / 770MPa.
3) Temperature 20 ° C / 200 ° C / 400 ° C, reduction of area 49% / 51% / 52%
4) Temperature 20 ° C / 200 ° C / 400 ° C, elongation 13% / 14% / 16%
5) Temperature 20 ° C / 200 ° C / 400 ° C, impact toughness (≥) 20J / cm / 32J / cm / 42J / cm
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Pre Hardened Engineering Steel Bar 33 - 37 Hardness HRC P20+Ni / 1.2738 / 718H Images
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