Steel EN 1.4742 / 15Kh18SYu
Steel grades such as Ferrotherm 4742 and EN 1.4742 / 15Kh18SYu belong to the group of heat-resistant stainless steels. The alloy consists primarily of iron (approximately 83%), while chromium, manganese, and aluminum are used as the main alloying elements. This chemical composition provides excellent resistance to oxidation and corrosion at elevated temperatures, making the material highly suitable for demanding industrial environments.
Key Advantages
- High strength
- Excellent impact resistance
- Good ductility
- Outstanding resistance to all types of corrosion
This steel grade is widely used in the manufacture of structures and equipment operating in aggressive environments with elevated sulfur content. The closest equivalent grades are EN 1.4724 and EN 1.4762, with the primary differences being the chromium and aluminum content.
During machining, the material may produce long continuous chips, which can make processing more difficult. To achieve optimal machining performance, recommended cutting parameters and tooling should be used.
EN 1.4742 / 15Kh18SYu is commonly used for manufacturing furnace components, heat-treatment equipment, and parts for pyrolysis installations. It is widely applied in the petrochemical industry, construction, mining, and medical engineering. The alloy retains its mechanical and corrosion-resistant properties at temperatures up to 900°C, making it suitable for heavy industry and metallurgical applications.
Chemical Composition of Steel EN 1.4742 / 15Kh18SYu
| Element | Content (%) |
|---|---|
| C | < 0.12 |
| Si | 0.70–1.40 |
| Cr | 12.0–14.0 |
| Al | 0.70–1.20 |
Mechanical Properties of Steel EN 1.4742 / 15Kh18SYu
| Property | Typical Value | Specification |
|---|---|---|
| Tensile Strength (Rm), MPa | 580 | 500–700 |
| Yield Strength (Rp0.2), MPa | 370 | ≥270 |
| Elongation (%) | 18 | ≥15 |
| Hardness (HB) | 212 | — |
Available Product Forms of Steel EN 1.4742 / 15Kh18SYu
| Product | Dimensions |
|---|---|
| Round Bar EN 1.4742 / 15Kh18SYu | Diameter: 6–500 mm |
| Steel Sheet EN 1.4742 / 15Kh18SYu | Thickness: 0.5–100 mm |
| Pipe EN 1.4742 / 15Kh18SYu | Hot-rolled seamless round pipe: 38–244.5 mm outside diameter with 3–25 mm wall thickness; thin-wall pipe with wall thickness from 0.9–14.2 mm |
| Hexagon Bar EN 1.4742 / 15Kh18SYu | Diameter: 17–65 mm |
| Flat Bar EN 1.4742 / 15Kh18SYu | Thickness: 5–50 mm; Width: 50–250 mm |
| Square Bar EN 1.4742 / 15Kh18SYu | Size: 10–80 mm |
