Kohli Iron & Steel Store are wholesaler and suppliers of IS 3502 round bar, flat bar, plate and block. Diameters can be sawn to your required lengths as one offs or multiple cut pieces. Rectangular pieces can be sawn from flat bar or plate to your specific sizes. IS 3502 can be supplied, providing a quality precision ground bar to your required tolerances.
P20 tool steel is ideally suited for the production of plastic moulds. Typical applications include die holders, zinc die casting dies, backers, bolsters and injection moulds. The versatility of P20 tool steel with its high tensile characteristics enables uses for a variety of other applications such as shafts, rails and wear strips.
| Carbon | 0.40% | Silicon | 0.40% |
| Manganese | 1.00% | Chromium | 1.20% |
| Molybdenum | 0.35% |
Heat slowly, allowing sufficient time for the steel to become heated through. Begin forging at 1050°C. Do not forge below 930°C reheating if necessary. After forging, cool very slowly.
Annealing takes abode at 760-788°C (1400 to 1450°F) and again the steels are cooled boring in the boiler at a temperature beneath than 4°C (40°F) per hour.
When dies are heavily machined, we recommend stabilising just before finish machining in order to relieve machining strains. Heat to 460-500°C. Soak well and allow to cool in the air.
Heat the steel uniformly to 820-840°C until heated through. Quench in oil.
Heat uniformly and soak at the tempering temperature for at least one hour per 25mm of section. Allow to cool in still air.
| Temperature [°C] | 100 | 200 | 300 | 400 | 500 | 600 |
| Hardness [HRc] | 51 | 50 | 48 | 46 | 42 | 36 |
| Tensile [N/mm²] | 1730 | 1670 | 1570 | 1480 | 1330 | 1140 |
| Temperature | Time | Approx. Depth of Case |
|---|---|---|
| 525ºC | 20 hours | 0.30mm |
| 525ºC | 40 hours | 0.35mm |
| 525ºC | 60 hours | 0.50mm |
Tools produced from may be case hardened, which can achieve a surface hardness of 55 to 59 HRc.
At 570ºC tufftriding of P20 tool steel will give a surface hardness of approximately 700HV. Allowing two hours treatment the surface hard layer will be approximately 0.1mm.
To avoid hydrogen embrittlement P20 should be tempered for 4 hours at 180°C for 4 hours after hard chromium plating.
Flame or induction hardening of P20 will achieve a hardness of 50 to 55HRc. Air cooling is preferable, though smaller components may require forced cooling. Temper immediately after hardening.
P20 apparatus steels are acrimonious to 871-899°C (1600-1650°F) in the carburizing average during the carburizing process. After getting carburized, these steels are acrimonious to 816-871°C (1500-1600°F) in adjustment to be accustomed and again captivated for 15 account and assuredly oil quenched.
Chemical Composition of all are Plastics moulds steel series will match as per international standards, Please request for the certificate before placing the order.
With our material,we provide mill test certificate and ultrasonic Ok certificate (Note: Provide only if mentioned before placing the order.)
