Stainless Steel grades are essentially alloys of iron with more than 10.5% chromium. These grades may contain additional elements of nickel, manganese, carbon, nitrogen and silicon. They can further be adapted for special purposes by addition of molybdenum, titanium, niobium, silicon, sulphur etc. A full range of these grades have been developed based on unique requirements. These are categorized into following categories based on their micro structure:

Ferritic Stainless Steel
Ferritic Stainless Steel grades are non-hardenable simple chromium grades with chromium quantity ranging from 10.5% to 28% and with low carbon content. These are magnetic and present a higher resistance to corrosion than martensitic grades. These alloys are utilised employed in applications where the coveted 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 simple chromium alloys incorporating 11.5 % to 18% of chromium with comparatively high carbon quantity (0.1% ? 1.2%). Initially meliorated for cutlery, these are well suited for applications commanding high hardness and resistance to abrasion and erosion. These alloys are magnetic and present fair cold forming characteristics. Although these can be hardened by air-cooling, oil quenching is sometimes used to insure consistent hardening. These grades can be welded but call for stress relieving after welding. They demonstrate their best corrosion resistance in the hardened condition and execute well in mildly corrosive environments. Martensitic Stainless Steel grades are usually 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: steel

Austenitic Stainless Steel
Austenitic Stainless Steel grades are distinguished by prize corrosion and oxidation resistance, weldability, ductility and toughness compared to ferritic and martensitic Stainless Steel grades for similar levels of chromium. Austenitic Stainless Steel alloys possess brilliant resistance to atmospheric corrosion. They effectively withstand attack of organic acids (e.g. acetic, lactic, citric etc.), exhibit 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 ameliorated to lessen this tendency. Work hardening is beneficial in certain cases where high strength is required. Austenitic Stainless Steel grades are non-magnetic in annealed condition but banking on composition, they may become mildly magnetic when cold worked. These Stainless Steel grades display good high temperature properties such as creep strength and resistance to oxidation or scaling. They also exhibit outstanding low temperature ductility and impact strength. Austenitic Stainless Steel alloys can be promptly fabricated by bending, drawing, spinning, punching, drilling, machining and welding and can be readily 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 uses 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 relatively high chromium (between 18% and 28%) and medium quantities of nickel (1% to 8%). This integration of ferritic and austenitic structures is called duplex. Many of these alloys incorporate molybdenum (1% to 5%) and nitrogen (0.05% to 0.3%). Several duplex Stainless Steel grades also contain manganese (up to 5%), copper (up to 2%) and tungsten (up to 2%). These alloys demonstrate high resistance to stress corrosion cracking and chloride ion attack and have better 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 utilised 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: stainless steel categories

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