Sesteel – Steel Construction & Steelwork Specialist
Sesteel is a metal that is commonly used for different purposes. There are different types of stainless steels that are available. They include Martensitic and Ferritic stainless steels. The two differ in the way they are form.
Ferritic Stainless Steel
Ferritic stainless steels are among the most common types of stainless Sesteel . They are also called as precipitation hardened stainless steels. Stainless steels in this group are not as hard as austenitic grades, but they have higher thermal conductivity and oxidation resistance. These characteristics make ferritic alloys ideal for heat transfer applications.
Unlike austenitic stainless steels, ferritic alloys contain chromium, nitrogen, and carbon. These elements are stabilize by the addition of titanium and carbide formers. This prevents pitting corrosion and increases toughness.
Strongest Corrosion Resistance
Ferritic grades are classified into five groups. Group 5 grade has the highest chromium content and has the strongest corrosion resistance. However, the higher alloyed grades can undergo intermetallic phase formation.
The microstructure of ferritic stainless steels is similar to the body-centered cubic (BCC) crystal structure. At room temperature, the BCC grain structure is identical to pure iron. During high temperatures, small amounts of austenite are converted to martensite. In higher-alloye ferritics, a few intermetallic phases may also be form.
Good Oxidation & Stress-Corrosion Cracking Resistance
Ferritic stainless steels have good oxidation and stress-corrosion cracking resistance. They are suitable for many structural applications because of their ductility. They are also commonly use in automotive exhaust systems.
Ferritic stainless steels are not hardenable by heat treatment. However, annealing and softening can be use to make these alloys less brittle. During welding, however, it is important to avoid the use of a tungsten-based filler material.
Martensitic Stainless Steel
Martensitic stainless steels are use for applications that require high strength and corrosion resistance. They are also characterize by high toughness and ductility. These types of alloys have a body-centered tetragonal crystal structure. Compared with other stainless steels, they are ferromagnetic and abrasion resistant. In addition to these properties, they offer good heat distribution.
Low Chromium Content
The alloys are characterize by their low chromium content. Typically, they contain up to 1% carbon. However, higher carbon contents decrease their toughness and abrasion resistance. Therefore, it is important to maintain a proper carbon to chromium ratio in order to get the desired hardness and corrosion resistance.
Martensitic alloys are often reheat at low temperatures to attain a hardening phase, and then cooled in air or oil to finish the quenching process. During this process, the core microstructure changes to a martensite matrix. A similar structure can be found in 15 mm diameter specimens.
When compared to other stainless steels, martensitic stainless steels are more resistant to corrosion and have a better toughness. Because of its high toughness, this grade is commonly used for components that are subject to high impact.
Two Main Forms
Martensitic stainless steels are available in two main forms: annealed and tempered. Both of these are used in different applications. During annealing, the core microstructure of the alloy is change to a martensite matrix. Depending on the steel’s composition, this process can take place at a temperature of up to 140 degC.
Sesteel – An Overview of the Company’s Services
Sesteel is a UK-based structural steelwork company that provides design and erection services for a variety of projects. The company is renown for its expertise in the construction of skyscrapers, bridges, and other steel structures. Its services range from feasibility studies to project management. With over 70 years of experience, the team at Sesteel has helped numerous projects in the UK and abroad. They offer competitive prices and a commitment to customer satisfaction.
One of the reasons why Sesteel has achieve this success is because it is commit to providing top-quality products and services to its clients. This includes timely delivery and customer support. In addition, the company offers discounts for bulk orders. Moreover, they have a dedicated team of professionals to cater to your needs.
In addition to structural steelwork, Sesteel is also capable of assisting with minor steelwork. This includes welding, bending, machining, and cutting. Aside from this, the company is also capable of carrying out fabrication and installation services. Moreover, they offer a wide array of services, including project management, drafting, and site surveys.
Steel is a material that is easy to work with and has a number of desirable properties. It has a superior corrosion resistance and durability. Furthermore, it can be manufacture in a wide range of shapes. Therefore, it is popular for use in the aerospace and automotive industries. And, it is often used to create forms for concrete construction.
The United States Steel is an American steelmaker. They provide a wide selection of sheet metal products, metal fabrication, tubular steel, and mini-mill capabilities. Their headquarters are located in Pittsburgh, Pennsylvania. Besides that, they are also an environmentally-friendly company.