Stainless Steel grades are fundamentally alloys of iron with more than 10.5% chromium. These alloys may contain extra elements of nickel, manganese, carbon, nitrogen and silicon. They can further be restricted for special purposes by addition of molybdenum, titanium, niobium, silicon, sulphur etc. A deep variety of these alloys have been meliorated based on special requirements. These are categorised into following categories based on their micro structure:

Ferritic Stainless Steel
Ferritic Stainless Steel alloys are non-hardenable simple chromium grades with chromium content ranging from 10.5% to 28% and with low carbon quantity. These are magnetic and display a finer resistance to corrosion than martensitic alloys. These grades are used utilized in applications where the wanted formability, weldability and corrosion resistance is between those of martensitic and austenitic types. The ferritics can be polished or buffed to achieve high lustre.

Martensitic Stainless Steel
Martensitic Stainless Steel alloys are literal chromium grades incorporating 11.5 % to 18% of chromium with comparatively high carbon content (0.1% ? 1.2%). Initially ameliorated for cutlery, these are well suited for applications involving high hardness and resistance to abrasion and erosion. These alloys are magnetic and exhibit fair cold forming characteristics. Although these can be hardened by air-cooling, oil quenching is sometimes used to guarantee homogeneous hardening. These alloys can be welded but require stress relieving after welding. They present their best corrosion resistance in the hardened condition and execute well in mildly corrosive conditions. Martensitic Stainless Steel alloys are ordinarily utilized for knife blades, turbine blades, surgical instruments, fasteners, shafts, spindles, valves and pins.

Shanti Foils Private Limited deals in the manufacturing and trading of all types of stainless steel flat, rods, wires, sheets (patta and patti), sheet cuttings, blanks, circles, hot rolled and cold rolled coils, utensils, kitchenware, cutlery and scrap (HMS - I, HMS - II, Aluminium, and copper). For more information, detailed specifications, sale and purchase of these items, visit the site: stainless steel alloys

Austenitic Stainless Steel
Austenitic Stainless Steel grades are distinguished by brilliant corrosion and oxidation resistance, weldability, ductility and toughness compared to ferritic and martensitic Stainless Steel alloys for similar levels of chromium. Austenitic Stainless Steel grades present prize resistance to atmospheric corrosion. They effectively resist attack of organic acids (e.g. acetic, lactic, citric etc.), display good resistance to oxidizing acids (e.g. nitric acid) and fair resistance to mineral acids (e.g. sulfuric acid). These grades are well suited for severe forming. Some alloys are work harden to a high degree while others have been developed to minimize this tendency. Work hardening is advantageous in certain cases where high strength is required. Austenitic Stainless Steel grades are non-magnetic in annealed condition but relying on composition, they may become mildly magnetic when cold worked. These Stainless Steel grades present good high temperature properties such as creep strength and resistance to oxidation or scaling. They also display fantabulous low temperature ductility and impact strength. Austenitic Stainless Steel grades can be readily fabricated by bending, drawing, spinning, punching, drilling, machining and welding and can be promptly polished to a high finish. These attributes make them very versatile and popular for diverse applications in a variety of industries. There are two broad categories of Austenitic Stainless Steel ? chrome-nickel (300 Series) and chrome-manganese (200 Series). Currently, chrome-nickel is the largest produced Stainless Steel category globally. Typical applications for this category include food processing, chemical plants, pharmaceutical equipment, hospitals, textile, architectural, building construction, kitchenware, consumer durables etc. Chrome-manganese Stainless Steel is the fastest growing of all Stainless Steel categories on account of its high performance to cost ratio. Its applications include kitchenware, cutlery, sinks, automotive trim, architectural, buildings, furniture, buses, trains and ornamental tubes.

Duplex Stainless Steel
Duplex Stainless Steel grades comprise of comparatively high chromium (between 18% and 28%) and reasonable amounts of nickel (1% to 8%). This mixing of ferritic and austenitic structures is called duplex. Many of these alloys contain molybdenum (1% to 5%) and nitrogen (0.05% to 0.3%). Quite a few duplex Stainless Steel alloys also incorporate manganese (up to 5%), copper (up to 2%) and tungsten (up to 2%). These alloys show high resistance to stress corrosion cracking and chloride ion attack and have healthier yield strength than that of austenitic or ferritic steel alloys. These properties mixed with suitable design lead to material saving. High quality fabrication and welding are possible if the operator is trained well. These alloys are utilized in marine applications, offshore platforms, paper and pulp industry, chemical, petrochemical and desalination plants.

Shanti Foils Private Limited deals in the manufacturing and trading of all types of stainless steel flat, rods, wires, sheets (patta and patti), sheet cuttings, blanks, circles, hot rolled and cold rolled coils, utensils, kitchenware, cutlery and scrap (HMS - I, HMS - II, Aluminium, and copper). For more information, detailed specifications, sale and purchase of these items, visit the site: classification of stainless steel

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