P20 /1.2311 Pre-hardened Steel Plate for Injection Plastic Mould
Introduction
3Cr2Mo is an internationally widely used plastic mold steel, its
good mechanical properties, high hardenability can make Larger cross-section steel to obtain more uniform
hardness, and this steel has good polishing performance and high
mold surface finish.
When using this steel mold, usually make quenching and tempering
treatment first that the hardness is HRC28 ~ 35 (pre-hardened), and
then by cold working manufactured molds can be used directly.
In this way, it can guarantee the using performance of the mould,
and avoid deformation of the mold causes by heat treatment.
Therefore, the steel is suitable to manufacture big or medium-sized
precision plastic mold and low melting point, tin, zinc, lead alloy
die-casting molds.
Standard: GB/T 1299-1985
Similar grade: P20, 1.2311,PDS-3
Chemical elements(GB/T1299-20000)%
| C | Si | Mn | P | S | Cr | Mo | Ni |
| 0.28-0.4 | 0.2-0.8 | 0.6-1 | ≤0.03 | ≤0.03 | 1.4-2 | 0.3-0.55 | 0.85-1.15 |
Feature
1. Pure steel vacuum degassing refining process for polishing or etch
processing plastic mold.
2. Pre-hardened state of supply, without heat treatment can be used
directly in the mold, shorten the construction period.
3. By forging rolling processing, compact structure, 100% ultrasonic
testing, non-porous, needle defects.
4. For the production of plastic mold and die casting low melting
point metal mold material.
5. This steel has good machinability and mirror polishing properties.
6. Hardness:285-330HB(30-36HRC).
7. Good dimensional stability.
8. With long service life,Mold die life up to 50W times.
Application
1. Main part of overloading mould.
2. Thermoplastic injection molding, extrusion dies.
3. Commonly used in the manufacture of TV cabinet, washing machine,
refrigerator shells, buckets, etc.
Product pictures:
Recommend heat treatment:
| Quenching | Tempering |
| Heating temperature/ºC | Cooling way | Hardness (HRC) | Tempering temperature/ºC | Tempering number | Hardness (HRC) |
| First preheating | Second preheating | Last heating |
| 1180-1200 | 1130-1150 | ≥850 | Oil Cooling | 50-52 | 200 | 2 | ≥48 |
Delivery:
For abundant stock, 15-20 days.
For customized products, 30-50 days.
Packaging:
We provide the package according to the export standard or as
client's requirements
About loading:
Our service:
1.S izes, materials and others are all at your requirements and can
be changed;
2. Price varies on materials, dimensions, finish craft and
different payments;
3. We are direct manufacture in machinery manufacturing work with
experience of several decades;
4. Detail production design will be made according to information
you offered;
5. We have adequate inventory, so that we can quick delivery;
6. The most important is that we have advanced equipm
FAQ:Q: Are you a manufacturer or merely a trader?
A: We are trading company act as exporting Steel Products with our
own factory,we can manufacture the products as in cutomer's
requirement,wholesale and retail all kinds of domestic mould
steel,the price we offered is very competitive compared with other
agents.Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party,
such as SGS, CE,ISO if you need. Secondly, we have a complete set
of inspection system and every process is checked by QC. Quality is
the lifeline of enterprise survival. Third,the products we export
are mainly from ShaGang group, WenFeng group, XingCheng group,
DongTe group,DaYe and so on, the quality are certained.
Q: Delivery time?
A: We have ready stock for most of material grades in our
warehouse. If the material don't have stock, the delivery lead time
is about 30-50 days after receiving your prepayment or firm order.
Q: What is the payment term?
A:100% T/T or 30%T/T deposite prepaid, 70%Balance L/C
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you
come to China and arrange our driver to our airport to pick you up
when you come. 
