X2CrMoTi18-2

1.4521, also known as DIN X2CrMoTi18-2 or AISI 444, is a ferritic, nickel-free steel with high mechanical strength. Often referred to as 'acid resistant'

1.4521 consists mainly of iron (Fe), chromium (Cr) and molybdenum (Mo), with small amounts of titanium (Ti) and niobium (Nb). It usually contains about 17-18 % chromium, which provides its corrosion resistance, and 1 % molybdenum for improved corrosion resistance in certain environments.

One of the most important properties of steel 1.4521 is its excellent corrosion resistance. It is particularly resistant to corrosion in chloride-containing environments, such as those found in marine or industrial environments where exposure to corrosive chemicals is common. This corrosion resistance makes the steel suitable for applications where durability and longevity are crucial.

Although not as heat-resistant as austenitic stainless steels, steel 1.4521 still exhibits decent resistance to oxidation and scaling at elevated temperatures. It can withstand moderate temperatures without significant loss of mechanical properties.

1.4521 offers good formability, allowing it to be easily fabricated into various shapes and components through processes such as cold forming, bending and welding. This makes it suitable for applications where complex shapes or customised patterns are required.

As 1.4521 is a ferritic stainless steel, it is typically magnetic under all conditions, which can be advantageous in some applications where magnetic properties are desired.

Thanks to its corrosion resistance and formability, steel 1.4521 can be used in a wide range of industries. It is often used in automotive exhaust systems, solar panels, kitchen equipment, architectural applications and industrial machinery where corrosion resistance, durability and aesthetic appeal are important considerations.