Prehardening Plastic Mold Steel Plate For High Appearance Plastic Mould
► Similar grades: AISI-P21, JIS-, GB-B40
To make high pericision mirror plastic mould, high appearance home electronic plastic mould.
► Chemical composition (%):
| Grade | C | Si | Mn | P | S | Ni | Mo | Cu | Al |
| 0.06-0.20 | ≤0.35 | 1.40-1.70 | ≤0.030 | ≤0.030 | 2.80-3.40 | 0.20-0.50 | 0.80-1.20 | 0.70-1.30 |
| P21 | 0.10-0.18 | ≤0.35 | 1.70-2.0 | ≤0.030 | ≤0.030 | 2.90-3.40 | 0.20-0.50 | 0.80-1.20 | 0.70-1.00 |
► Introduction:
is a pre-hardened plastic mold steel.Factory hardness can reach HRC37-43.
Have a good polishing performance and carving, good electrical discharge.Use in the mirror polishing mold, auto parts discharge Processing die.The thickness of not more than 2MM thin sheet, efficient blanking die, punching die and embossing mold, all kinds of scissors, mosaic blade, woodworking blade, thread rolling and wear slider, cold heading die, thermosetting resin Forming mold, deep drawing die, cold extrusion die.
► Available size (mm):
| Flat Bar Size(mm) | Round bar Size(mm) |
| Thickness | Width | Length | Diameter | Length |
| 10-1100 | 155-2200 | 2000-6000 | 20-200 | 2000-6000 |
► Feature:
No heat treatment, excellent polishing, cutting, and floral
Vacuum degassing refining treatment of steel purity.
The spheroidizing annealing is softened and the machining performance is good.
The reinforcement element vanadium, molybdenum special addition, wear resistance extremely excellent.
► Applications:
General use in the mirror polishing mold, anti-dust, TV filter board, cosmetic box, precision wrinkle processing mold, office automation equipment, auto parts discharge processing mold. Transparent products or products requiring smoothness, such as home, cars, cameras, computers and other supplies on the transparent product mold.
● Thickness of not more than 2MM thin sheet, efficient blanking die, punching die and embossed mold.
● All kinds of scissors, mosaic blade, woodworking blade.
● Thread rolling and wear-resistant sliders.
● Cold heading die, thermosetting resin molding die.
● Deep drawing mold, cold extrusion die
► Technical service:
Surface treatment of die and mould vacuum heat treatment (nitrogen and oxygen, carbon and nitrogen, carburizing, nitriding) .
► Cryogenic treatment:
In order to obtain the highest hardness and dimensional stability, die immediately after quenching cryogenic - 70 to - 80 ℃, keep 3-4 hours, and then in the tempering process, the cryogenic processing tool or mold hardness is higher than conventional heat treatment hardness 1-3 HRC.The complex shape and the size of the larger parts, the cryogenic treatment has the risk of production cracking.
► Nitriding treatment:
When the mold or workpiece is treated with nitrogen, a layer of hardened layer with high hardness and corrosion resistance is formed on the surface.
► Product photos:
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