Stainless Steel
Stainless Steel
Stainless Steel are a group of corrosion resisting steels containing a minimum 10% Chromium and in which varying amount of nickel, Molybdenum, titanium, niobium as well as other element may be present. An English Man Harry Brearley is generally acknowledged to be the pioneer who developed stainless steel for commercial use.
| Stainless Steel Type | Standard Grade |
|---|---|
| Austenitic Stainless Steel : Steels containing high percentages of certain alloying elements such as manganese and nickel which are austentic at room temperature and can not be hardened by normal heat treatment but do work harden. They are also non Magnetic. | 300 Series like 304, 304L, 309,310,316, 316L,347,321 |
| Martensitic Stainless Steel : Martensitic stainless steels are a group of chromium steels ordinarily containing no nickel developed to provide steel grades that are both corrosion resistant and hardenable via heat treating to a wide range of hardness and strength levels. | 400 Series like 410, 416, 420,431,440A,440B, 440C |
| Ferritic Stainless Steel : Ferritic Steel indicates a group of stainless steel with chromium content in the range of 14 to 18% by weight and whose structure largely consist of ferrite. Ferritic stainless steels are ‘soft’ magnetic materials, pocess good ductility, and as such exhibit low coercivity and remanence and potentially high magnetic inductions. | 405, 430,434,444,446 |
| Duplex : Duplex stainless steels are Fe-Ni-Cr alloys consisting of ferritic-austenitic microstructure at room temperature. | EN - X2CrNiN23-4, X4CrNiMoN27-5-2, X2CrNiMoN22-5-3 and as per AISI grades like 2327, 2328,2324, 2205 |
| Grade | Typical Applications |
|---|---|
| Austenitic Stainless : 304, 304L, 309,310,316, 316L,347,321 | Core application of fast reactors, architectural, food and beverage, chemical processing equipment and construction applications |
| Martensitic : 410, 416, 420,431,440A,440B, 440C | Cutlery, Sugical Equipments, Shafts, Ball Bearings, Scissors, Turbine & Petrochemical Equipments.Mail Boxes, garbage containers, Elevators, Escalotors, Curtain rails etc |
| Ferritic : 405, 430,434,444,446 | Automotive Trims, Architectural Cladding, Electrical appliances like Rice Cooker, Dish washer, Micro wave ovens, Freezer Cases, etc |
| Duplex : EN - X2CrNiN23-4, X4CrNiMoN27-5-2, X2CrNiMoN22-5-3 and as per AISI grades like 2327, 2328,2324, 2205 | Number of applications in Corrosive Environments like Sour Gas Pipe Line, Chemical Reaction Vessels, Re inforcing bars, tubing in condenser and heat exchangers etc where welding is not required. |