Stainless Steel 1.4578 / UNS S31266
General Technical Characteristics
Stainless steel 1.4578 / UNS S31266 is a highly alloyed austenitic corrosion-resistant steel designed for operation in aggressive environments and under high loads. The material contains high levels of chromium, nickel, and molybdenum, which provide excellent resistance to corrosion, including pitting and crevice corrosion.
Due to its balanced chemical composition, UNS S31266 steel demonstrates high strength, good ductility, and stable mechanical properties. The material maintains its performance characteristics when exposed to chemically active environments, seawater, and elevated temperatures.
Stainless steel 1.4578 is widely used for manufacturing equipment operating in demanding conditions where high reliability and long service life are required.
Applications
Stainless steel 1.4578 / UNS S31266 is used in various industrial sectors:
- chemical and petrochemical industry
- marine and offshore engineering
- heat exchanger manufacturing
- equipment for aggressive environments
- pipeline systems
- pump and valve equipment
- power generation industry
High corrosion resistance makes UNS S31266 a suitable material for critical structures and industrial equipment.
Features and Advantages
Key advantages of stainless steel 1.4578:
- high corrosion resistance
- resistance to pitting and crevice corrosion
- good strength and ductility
- resistance to aggressive chemical environments
- good weldability
- durability and reliability in operation
Thanks to these properties, the UNS S31266 stainless alloy is widely used in equipment operating in demanding industrial conditions.
Chemical Composition
| Element | Content % |
|---|---|
| Chromium (Cr) | 19–21 |
| Nickel (Ni) | 24–26 |
| Molybdenum (Mo) | 6–7 |
| Manganese (Mn) | ≤ 2 |
| Silicon (Si) | ≤ 1 |
| Carbon (C) | ≤ 0.03 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Iron (Fe) | balance |
Mechanical Properties
Main mechanical properties of UNS S31266 steel:
- Tensile Strength (Rm): 650–850 MPa
- Yield Strength (Rp0.2): ≥ 300 MPa
- Elongation: ≥ 35 %
- Hardness: up to 220 HB
High strength and corrosion resistance make stainless steel 1.4578 / UNS S31266 an optimal material for manufacturing industrial equipment and structural components operating in aggressive environments.
