TRILOK STEEL is one of the leading Manufacturer, Supplier and Exporter of Stainless Steel Materials that are actually manufactured from High Quality of Standard Raw Materials and are designed as per with national and international standards.Our offered stainless steel products like Stainless Steel Pipe,Stainless Steel Seamless Pipeand Stainless Steel Tubeare used for piping systems where resistance to stress-corrosion cracking is required. Our product range includes 304/304L Pipes,316/316L Pipes ,201 Pipes in custom-made shapes and sizes as per the requirements given by our clients, and that too at an affordable and market leading prices.
'Stainless' is a term coined early in the development of these steels for cutlery applications.Stainless steel, any one of a family of alloy steels usually containing 10 to 30 percent chromium. In conjunction with low carbon content, chromium imparts remarkable resistance to corrosion and heat. Other elements, such as nickel, molybdenum, titanium, aluminum, niobium, copper, nitrogen, sulfur, phosphorus, or selenium, may be added to increase corrosion resistance to specific environments, enhance oxidation resistance, and impart special characteristics. It was adopted as a generic name for these steels and now covers a wide range of steel types and grades for corrosion or oxidation resistant applications.
Grade 304 (1.4301) is the grade most often used for corrosion resistant reinforcement, suitable for most atmospheric and concrete covered environments.
Grade 316 (1.4401) has a higher molybdenum and nickel content than 304 (1.4301). It is more expensive but also has higher corrosion resistance and is the recommended grade for marine and corrosive environments.
There are five major types of stainless steel.
Austenitic stainless steels are 200 series or 300 series. They are non magnetic and have high corrosion resistance. They can be hardened only by cold working – not by heat treatment. They are highly formable. But, they are prone to stress corrosion cracking. There are three subtypes: straight, L and H. Popular straight types are grades are 201, 202, 301, 302, 303, 304, 305, 308, 309, 310, 314, 316, 317, 321, 347, 348 and 384. L types have higher corrosion resistance than the straight types. Examples include 304L and 316L. H types are suitable for use in high temperature environments. Austenitic stainless steels are used in shafts, valves, bolts, bushings, nuts, aircraft fittings, chemical equipment, food processing equipment, brewing equipment, cryogenic vessels etc.
Ferritic stainless steels are 400 series. They are magnetic. They have lower ductility and lower corrosion resistance than the austenitic grades. But, they offer high resistance to stress corrosion cracking. They are hardened by cold working and are not heat treatable. Some of the popular grades are 405, 409, 430, 434, 442, 436 and 446. Typical applications are heat exchangers, automotive fasteners, furnace parts, heater parts.
Martensitic stainless steels are 400 series and 500 series. They are magnetic. They have higher strength, higher wear resistance and higher fatigue resistance than the austenitic and ferritic grades. They can also be heat treated. But, corrosion resistance is moderate and lower than the austenitic and ferritic grades. They are highly machinable. Some of the popular grades are 410, 414, 416, 420, 440 and 431. Major applications are machine parts, pump shafts, bolts, bushings, coal chutes, cutlery, hardware, jet engine parts, mining machinery, rifle barrels, screws, valves, aircraft fittings, fire extinguisher inserts, rivets.
Precipitation Hardening Grade Stainless Steels are also called PH types. Their corrosion resistance is equivalent to that of austenitic grades and strength is generally higher than that of martensitic grades. They also retain high strength at elevated temperatures. They are heat treatable. They are mainly used in aerospace industry for aerospace structural components. Popular grades include 17-4PH and 15-5PH.
Duplex stainless steels are mixture of austenitic and ferritic. They provide higher corrosion resistance than the austenitic stainless steels. They are also more resistant to stress corrosion cracking than the austenitic stainless steels. They have higher strength than the austenitic grades. Popular UNS duplex grades include S32101, S32304, S32003, S31803, S32205, S32760, S32750, S32550, S32707 and S33207. Typical applications are water treatment plants and heat exchanger components.
Stainless steel is a type of alloy steel that resists rust and other forms of corrosion and has an attractive appearance.
Stainless steel contains chromium which provides the unique stainless and corrosionresisting properties.
Stainless steel has a unique self-healing property. Due to the alloying elements used, a thin, transparent layer is formed on the surface. In case the surface is scratched or damaged otherwise, this thin layer, which is only a few atoms thick, immediately rebuilds with the assistance of oxygen from air or water. This is the reason why stainless steel does not require any coating or other corrosion protection to remain bright and shiny even after decades of use.
The lack of need for a finish reduces delivery time of stainless parts. However parts cost more to machine due to their hardness. Stainless parts offer higher strength and corrosion resistance. The metal usually remains bright and shiny even after decades of use. Stainless steel also retains strength and shock resistance even at high temperatures. Stainless Steel is hygienic due to the smooth and minimally porous surface. Most alloys are non-magnetic. Stainless steel has excellent fatigue and impact resistance. Products made with the metal generally last a long time.
|300 Series||301 – 302 – 303 – 304/L – 304H – 316/L – 317L – 317LMN – 321 – 321H – 347 – 347H|
|300 Series High Temp||309 – 309S – 310 – 310S – 310H – 330|
|400 Series||403 – 405 – 409 – 410 – 410S – 410HT – 416 – 416HT – 420 – 422 – 430 – 440C|
|Duplex||2205 – 2304 – 2507 – LDX2101|
The below table shows the chemical composition of the most used A312 Stainless Steel Pipes:
|Material||Heat||Temperure||Tensile Strength||Yield Strength||Elongation %, Min|
|Treatment||Min.||Ksi (MPa), Min.||Ksi (MPa), Min.|
|º F(º C)|
|Military Specification stainless Pipe & Tubing|
|MIL-P-1144||Seamless Or Welded||Stainless-All Grades||High Temperature & Pressure|
|MIL-P-24691/3||Seamless||Stainless-All Grades||High Temperature & Pressure|
|MIL-T-8504/AMS-5567||Seamless Or Welded||Type 304||Corrosion & Hydraulic|
|MIL-T-8606/AMS-5560||Seamless||321,347,304L Stainless||Corrosion Applications|
|MIL-T-8808/AMS-5570||Seamless||321 & 347 Stainless||Corrosion Applications|
|MIL-T-16286||Seamless||Class C Type 321 Or 347||High Pressure Steam & |
Super Heater Generator
|MIL-T-16286||Seamless||Class E & F Chrome Moly||High Temperature & Pressure|
|MIL-T-23226||Seamless||Type 304, 304L, 347||High Pressure Steam & |
Super Heater Generator