Guangzhou Changfeng Steel Co., LTD |
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Round Polished Tool Plastic Prehardening Injection Mold Steel P20 3Cr2Mo 1.2311
1. Introduction
P20 is an internationally widely used plastic mould 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
prehardening treatment to make the hardness reach HRC28 ~ 34
(pre-hardened).
2. Standard
GB/T 1299-1985
3. Similar grade
P 20, 1.2311,PDS-3, 3Cr2Mo
4. 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 |
5. Available size
Round | Diameter | Length | |
10mm-350mm | 3000mm-6000mm |
6. 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
7. Application
1.Main part of overloading mold
2.Thermoplastic injection molding, extrusion dies
3.Commonly used in the manufacture of TV cabinet, washing machine,
refrigerator shells, buckets, etc.
8. Our service