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P20,S136 Material performance reference
material Chemical composition hardness Characteristic purpose Usage method:
P20 C=0.28-04,Si=0.2-0.8,Mn=0.6-1,Cr=1.4-2 The factory hardness:29-33HRC

1 uniform hardness, good polishing performance and light etching engraving performance, processing performance is good.
2 vacuum degassing refining treatment of pure steel, suitable for the requirements of polishing or etching of plastic mold.
3 pre hard state of supply, no need to re processing can be directly used to mold processing, shorten the time limit for a project.
4 rolling by forging processing, compact structure, 100% ultrasonic testing, no pores, pinhole defects.
1 for the front shell of the TV, telephone, water dispenser, vacuum cleaners and other plastic mould and die.
2 thermoplastic plastic injection mold, extrusion die.
3 thermoplastic plastic blow molding die.
4 heavy duty die main parts.
5 cold parts.
Commonly used in the manufacture of television chassis, washing machines, refrigerators, shells, buckets, etc.
P20 pre hardened 285-330HB (30-36HRC), and 618 in Sweden Germany GS-2311, can be directly used for molding processing, and has the characteristics of good dimensional stability, pre hardened steel can meet the demand for general use, die life up to 50W mode.
P20 die steel quenching temperature:
Chromium nickel alloy steel (also known as P20 material). Material properties: ASSAB co production of 3 kinds of P20 materials, for the 718S, 718H, 618. P20 material has high hardness, good toughness, strong tensile strength, but it is not resistant to corrosion and wear resistance. P20 material quenching is easy to burst, only the surface nitriding treatment, oxidation of the requirements for the surface 0.1mm, the hardness is 65~68HRC. Processing requirements: P20 material cutting performance, when the P20 material minimum size is greater than 300mm, if there are a large number of wire cutting or EDM processes in the machining process, online cutting or EDM process is completed, must do a tempering
s136 C=0.38,Si=0.8,Mn=0.5,Cr=13.6 The factory hardness:30-33HRC,After heat treatment:48-52HRC S136 is a stainless steel tool steel, which has the following characteristics:
Excellent corrosion resistance
Excellent polishing performance
Excellent wear resistance
The excellent mechanical processing
The quenching with excellent stability
The comprehensive advantages of the above, the production of steel has excellent properties. Due to its excellent corrosion resistance, the benefits of using the plastic mold are outlined below:
The relatively low maintenance cost
After long-term use of the mold, the mold cavity surface is still maintained the original smooth state. No special protection is required when the mold is operated or stored in a wet environment.
The lower production costs
Due to the cooling water channel of the mould is not affected by the corrosion (unlike common die steel), the heat conduction characteristics and cooling efficiency are kept stable during the die life.
The benefits of combining S136 with high wear resistance, low maintenance cost and high life dies, to achieve the best economic benefits. At the same time S136 after the "electro slag remelting process (ESR)" refined, with a pure and subtle organization.
S136 is recommended for all molds, due to its special nature, which is more suited to the needs of special environments.
Corrosion resistance and corrosion resistance:
The mould use corrosive PVC, acetate such as injection molding materials or must work in a humid environment and storage.
Abrasion resistance
In the use of wear larger injection molding material (including thermosetting injection molding die) or require a longer working hours, such as electronic parts, discard the type of meal tools, utensils, etc..
Surface of high smoothness
Production of optical products, such as cameras, sunglasses, chemical instruments and plastic products, etc..
Corrosion resistance of S136:
S136 can resist water, water vapor, weak organic acid, diluted nitrate, carbonate, etc.. Mould made of S136. If you operate in a humid environment, or in the normal state of the use of corrosive plastic materials, will not rust or contamination. S136 in the low temperature tempering and polishing to the mirror state, in particular, can show excellent corrosion resistance.
Mold type
Use hardness
Injection molding: 1 thermoplastic plastic
2 thermosetting plastics
Compression reciprocating mold
P.V.C.PET blow mold
Extrusion die
Corrosion resistance
STAVAX S-136 can resist water vapor, weak organic acids, nitrate, thin carbonate, through the mould made of S-136 STAVAX, if in a humid environment or use corrosive in the normal state of plastic material, will not rust or contaminated. If the tempering to 250 degrees and polished to a mirror state, in particular, can show excellent corrosion resistance.