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Introduction
(DIN 1.2083) is a martensitic stainless steel with 12% Chromium which is sufficient to give good corrosive resistance properties. It’s best corrosive resistance is when hardened and surface is ground or polished. It has good ductility in the annealed condition but can be hardened up to 500HB (highest of the chromium grades).
Smelting method : EAF+LF+VD+ESR
Main Characteristics : Favourable corrosion resistance, abrasion resistance, quenching, quenching, cutting performance, and polishability as well as high surface fineness.
Major Applications : Production of PVC molds
Long-life molds
Molds for disposable tableware
Production of optics parts for example cameras, sunglasses lens, medical vessels, etc.
Chemical Composition : (%)
| C | Si | Mn | Cr |
| 0.38-0.45 | 0.95-1.00 | 0.95-1.00 | 12.50-14.50 |
| Mo | Ni | P | S |
| - | - | 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) |
| 7.8 | 460 | 24 |
| Elastic mouldsus (N/nm²) | Linear Expensivity (x10-6K) 20 ~ 200°C
20 ~ 400°C
|
| 220,000 |
10.9
11.6
|
Purity :
Electric furnace steel :
| Class A | Class B | ||
| Fine | Coarse | Fine | Coarse |
| 1.5 | 1.0 | 2.0 | 1.5 |
| Class C | Class D | ||
| Fine | Coarse | Fine | Coarse |
| 1.5 | 1.0 | 1.5 | 1.5 |
Electroslag steel :
| 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 under annealing state, delivery hardness ≤235HB;
Supply Specifications :
| Round Steel | Flat Steel | Module |
| Φ 16-500mm | 16~120mm x 200~810mm | 120~500mm x 300~1200mm |
Heat Treatments :
| Softening annealing | Quenching |
| Heating to 850°C for heat insulation; cooling to 650°C at 10°C/h air cooling. | 1,020~1,030 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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