Martensitic steels are also magnetic and possess relatively high ductility and toughness, which make them easier to form. It’s used whenever corrosion resistance and-or oxidation resistance are required along with either high strength at low temperatures or creep resistance at elevated temperatures. They have a low to high carbon content, and contain 12% to 15% chromium and up to 1% molybdenum. Martensitic stainless steels are in the 400 Grade series of stainless steels. Read more about 304 vs 316 stainless steel Martensitic It is used in the making of a wide range of products such as food preparation equipment, laboratory benches, medical and surgical equipment, boat fittings, pharmaceutical, textile, and chemical processing equipment. Grade 316 is another common stainless steel. Sometimes referred to as 18/8 because of its 18% chromium and 8% nickel, it is used in kitchen equipment, cutlery, food processing equipment, and structural components in the automotive and aerospace industries. Grade 304 is the most common stainless steel. The 200 series primarily uses the addition of manganese and nitrogen. The austenitic structure of the 300 series is distinguished via the addition of nickel. Austenitic steels are divided into the 300 series and 200 series subcategories, which are determined by which alloys are used. Perhaps the most common category of stainless steel, austenitic grade steels are high in chromium, with varying amounts of nickel, manganese, nitrogen, and some carbon. Typical applications for ferritic stainless steels include automotive components and parts, petrochemical industry, heat exchangers, furnaces, and in durable goods like appliances and food equipment. They have magnetic properties, too, offers good ductility, tensile-property stability, and resistance to corrosion, thermal fatigue, and stress-corrosion cracking. Ferriticįerritic steels are the 400 Grade stainless steels noted for their high chromium content, which can range from 10.5% to 27%. The family of stainless steels is primarily classified into four main categories based upon their crystal microstructure. Type 420 is known as surgical steel, and type 440 is known as razor blade steel.įor more information, see our page on stainless steel types. Cutlery grade stainless steels are found in the 400 Series, which is derived from ferritic and martensitic chromium alloys. The most common grades are type 304 and 316 that consist of austenitic chromium-nickel alloys. Each type of stainless steel is classified by its series number and then assigned a numerical grade. There are many numerical grading systems for stainless steel, designated according to their composition, physical properties, and applications. Once stainless steel is put into service, it does not need to be treated, coated or painted. Other favorable properties for consumers are its high strength and durability, its high and low temperature resistance, increased formability and easy fabrication, low maintenance, long-lasting, attractive appearance and it is environmentally friendly and recyclable. The 10.5% minimum content makes steel approximately 200 times more resistant to corrosion than steels without chromium. Above all, because of its chromium content, it is extremely resistant to corrosion. Stainless steel has many desirable properties that contribute greatly to its widespread application in the making of parts and components across many industrial sectors. Other common alloys found in stainless steel are nickel, magnesium, molybdenum, and nitrogen. Like other steels, stainless steel is composed primarily from iron and carbon, but with the addition of several other alloying elements, the most prominent being chromium. One of the main characteristics of stainless steel is its minimum chromium content of 10.5%, which gives it its superior resistance to corrosion in comparison to other types of steels. Stainless steel is the name of a family of iron-based alloys known for their corrosion and heat resistance. Home » News » Stainless Steel Characteristics Stainless Steel Characteristics
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