P-20 1.2085 Plastic moulding steel
P-20 1.2085 Plastic moulding steel
Specification
1.2085 is a pre-hardened and 16%Cr mould steel with improved corrosion resistance properties, Furthermore, specific sulfur improves the machinability response. The grade delivered in quenched and tempered condition has a fully bainite martensite microstructure and typical hardness in as-delivered condition of 280 to 325 HB,good machinability.
Application
Mould frames, tools for processing corrosive plastics. This steel is recommended where the main requirement is for machinability with good corrosion-resistance. This steel is commonly used for mould steel applications including holders or support plates subjected to wet working and/or storage conditions. The grade is also used for the manufacturing of corrosive materials like PVC, components, plastic moulds.
Chemical Analysis %
| C | Mn | Cr | Si | P | S | NI |
|---|---|---|---|---|---|---|
| 0.28-0.38 | 1.40 MAX | 15.00-17.00 | 1.00 MAX | 0.030 MAX | 0.05-0.10 | 1.00 MAX |
Hardened and Tempered 270-325 HB
Heat Treatment
| Soft Annealing | Cooling | Stress Relieving | Hardness | Hardening | Quenching | Hardness after quenching HRC |
|---|---|---|---|---|---|---|
| 850-880°C | Furnace | 590-650°C | 320 HB MAX | 1000-1050°C | Oil | 48 HRC |
| Tempering°C | 100 | 200 | 300 | 400 | 500 | 600 |
|---|---|---|---|---|---|---|
| HRC | 48 | 48 | 47 | 46 | 47 | 30 |