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Introduction
(DIN 1.2316) is a chrome-molybdenum steel with improved corrosion resistance properties, (DIN 1.2316) possesses good polishability, toughness, heat resistance and wear-resistant properties. It is often used for tools for processing chemically aggressive plastic materials (e.g. PVC).
Smelting method : EAF+LF+VD+ESR
Main Characteristics : Extremely high monitoring performance, favorable corrosion resistance, high abrasion resistance and favorable machining performance.
Major Applications : Super-mirror plastic molds: molds for optical lens and other transparent plastic pieces
Corrosion preventive high-resisting molds: Molds for fold vessels, cosmetics vessels, medical devices, light guiding plates, bottle covers, etc.
Formed resin materials: PC, PVC, PP, PE, PF, PMMA adding fire retardant resin etc.
Chemical Composition : (%)
| C | Si | Mn | Cr |
| 0.33-0.43 | 0.95-1.00 | 1.00-1.30 | 15.00-17.00 |
| Mo | Ni | P | S |
| 1.00-1.30 | 0.90-1.00 | MAX 0.030 | MAX 0.030 |
Physical Property : (%)
| Room temperature density (kg/m³) | Specific heat of room temperature (J/Kg.K) | 200°C thermal conductivity (W/m.K) |
| 7.80 | 465 | 23 |
| Elastic mouldsus (N/nm²) | Linear Expensivity (x10-6K) 20 ~ 200°C
20 ~ 400°C
|
| 241,000 |
11.2
11.5
|
Ultrasonic flaw detection :
Flaw detection standard: as per GB/T 6402-2008 Class 4 flaw detection standard or as per customer requirements.
Purity :
| Class A | Class B | ||
| Fine | Coarse | Fine | Coarse |
| 1.0 | 0.5 | 1.5 | 1.0 |
| Class C | Class D | ||
| Fine | Coarse | Fine | Coarse |
| 1.0 | 1.0 | 1.5 | 1.0 |
Delivery State :
(1) Delivery hardness, delivery under annealing state ≤ 255HB.
Supply Specifications :
| Round Steel | Flat Steel | Module |
| Φ 16-500mm | 16~120mm x 200~610mm | 120~300mm x 300~1000mm |
Heat Treatments :
| Softening annealing | Quenching |
| Heating to 850°C for heat insulation and cooling to 650°C at 10°C/h air cooling | 1020-1030°C quenching rapid air cooling |
| Tempering |
| Tempering temperature 250°C, (favorable tenacity and corrosion resistance) : selecting tempering temperature as per hardness requirements; tempering for twice. |
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