Steel grade X6Cr17 is the Polish designation for a stainless steel containing 17% chromium and 6% nickel, manufactured in acid-resistant version. This grade is ferritic, meaning it is a magnetic material, and is also known by the international designation AISI 430.
X6Cr17 grade steel is used in a variety of applications, including as a structural material, heat exchangers, and kitchen utensils. Its chemical composition makes it suitable for use in very acidic environments, and its lower chromium content gives it a higher resistance to corrosion caused by high concentrations of chloride and other chlorides. This steel is also weldable.
The mechanical properties of X6Cr17 grade steel vary depending on the solution heat treatment and the hot rolling treatments applied. In the annealed and tempered condition, the tensile strength of this grade can reach up to 650 MPa, the total elongation can range from 8 to 22%, and the proof stress can reach up to 300 MPa.
X6Cr17 grade steel can also be cold rolled to achieve desired thickness levels. This steel is usually cold rolled at a low speed and a high reduction rate to prevent any cracks from forming. The cold rolling processes will also increase the strength and hardness of the steel up to 60 HRC and up to 1060 MPa in tensile strength and 1300 MPa in proof stress respectively.
X6Cr17 grade steel is often coated with a zinc rich or chrome rich passivation, depending on the application it will be used for. This coating helps the steel to resist corrosion by preventing any oxygen or water from getting in contact with the steel’s surface. Additionally, if needed, the steel can also be treated with an acid pickling process to remove any undesirable oxides or scale.
In conclusion, X6Cr17 grade steel is a commonly used ferritic stainless steel that provides excellent corrosion resistance in a wide range of applications. This steel is easy to weld, and its mechanical properties can be tailored to meet specific requirements. As well as being highly resistant to corrosion, this steel is also treated to be smoothly passivated and available in a range of surface coatings.
