/ P21 Plasitc Mold Steel Plate / Flat bar With High polishability
Similar grades: AISI-P21, JIS-, GB-B40
Technical service:
Surface treatment of die and mould vacuum heat treatment (nitrogen and oxygen, carbon and nitrogen, carburizing, nitriding).
Hardness: 38-42HRC
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 |
Introduction:
Grade / P21 is a pre-hardened plastic mold steel.Factory hardness can reach HRC37-43.
Grade / P21 has 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.
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 |
Features:
● No heat treatment, excellent optical polishing, machinability, good erosion
● Vacuum degassing refining steel pure.
● Spheroidized annealing softening treatment, good cutting performance.
● strengthen the elements of vanadium, molybdenum special addition, wear resistance is extremely excellent.
Heat treatment:
| Quenching | Tempering |
| Heating temperature | Cooling | Hardness/HRC | Heating temperature | Cooling | Hardness/HRC |
| 840-870 | OIL | 50-55 | 200-500 | AIR | 37-43 |
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.
Advantages:
There is no need for heat treatment, the polishing is excellent, cutting, and the erosion is good.
Vacuum degassing refining treatment of steel purity.
Terms of payment:
30% deposit T/T and the balance by L/C at sight, or T/T.
Delivery condition:
For abundant stock, 15-20 days.For customized products, 30-50 days.
Product photos:
Product Tags:
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Cold Extrusion Die P21 / Tool Steel , Precision Ground Steel Plate Great Polishability Images
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