APPLICATIONS

SS 301

An austenitic stainless steel, which because of its ability to attain high strength and ductility through moderate or serve cold working, can be used for automobile trims, conveyor belts, transportation cars such as railway coaches, metal fixtures for construction purposes, roof drainage products, strong door frames and tableware.

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SS 304
It is the most widely used austenitic stainless steel. Popularly known as 18/8 stainless steel, it has excellent corrosion resistance and forming characteristics. Used in chemical, petrochemical and fertilizer industries, and as equipment in dairy, food processing, pharmaceutical industries, in hospitals, households as kitchenware, cryogenic vessels and as heat exchangers in air conditioning refrigeration, for machinery in paper, pulp and textile beverage sectors.

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SS 304L
An austenitic stainless steel similar to SS 304 with less carbon (0.03% max). It used in place of SS304 for improved resistance to intergranular corrosion. It is used for parts and structures which cannot be heat treated for stress relieving after welding.

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SS 309/ SS 309S

There are austenitic stainless steels which are strong and tough. Because of their higher nickel and chromium content, these are used for applications requiring high scaling resistance. They find their use for air heaters, annealing boxes, Chemical Composition oven equipment, boiler baffle plates carburising boxes, chemical processing equipment, dryers, exhaust manifolds, furnace parts, gas turbine parts, heat exchangers, jet engine parts, oil burner parts, oven equipment, petroleum refining equipment, etc.

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SS 310/SS 310S
These are austenitic types with higher chromium and nickel content than 309/309S. Because of their relatively high creep strength and mechanical properties at higher temperatures these steels find their applications for higher temperatures and severe service conditions. Used for air heaters annealing boxes, ovens carurising boxes, fire box sheets, furnace linings, furnace stacks and dampers, gas turbine parts, heat exchangers, kiln linings, nozzle diaphragm assemblies for turbo jet engines, oil burners parts, paper mill equipment, oil refinery equipment, recuperates and so on.

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SS 316
An austenitic stainless steel with 2.0 to 3% Mo. which improves corrosion. resistance and imparts hot strength characteristics. Used for applications requiring resistance to pitting corrosion. and in halogen atmospheres. Typical applications : architectural trims, marine exteriors, chemical processing equipment, food processing equipment, petroleum refining equipment, pharmaceutical equipment, photographic equipment, pulp and paper processing equipment, textile finishing equipment, etc.

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SS 316L

An austenitic stainless steel. Modification type SS 316 contain a maximum of 0.03 percent carbon) with reduced tendency towards carbide precipitation without addition of a stabilising element. Recommended for parts which cannot be heat treated after welding.

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SS 317 / SS317L

These are austenitic stainless steels which are modifications of type SS 316 / SS 316L and offer increased chromium, nickel and molybdenum ranges for improved corrosion. resistance. The steels were developed to resist attack of sumptuous acid compounds. They resist pitting in phosphoric and acetic acids. Applications includes paper pulp handling equipment, process equipment for producing photographic chemicals, bleaching solutions and handling sulphurous, acetic, formic, citric and tartaric acids. They have best corrosion. resistance to body acids and blood and are recommended for surgical bone applications.

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SS 321

An austenitic stainless steel similar to SS 304 but stabilised with titanium to avoid inter-granular corrosion. Type SS 321 resists scaling and vibration fatigue. It is used for aircraft exhaust stacks and manifolds, pressure vessels, large mufflers for diesel engines, carburetors, expansions belows, stack liners, fire walls, etc.

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SS 347

An austenitic stainless steel similar to SS 321 but stablilised by Columbium which does not appreciably reduce the overall corrosion. resistance. Recommended in the range of 420 Degree Centigrade to 900 Degree Centigrade for parts fabricated by welding and which cannot be subsequently annealed. Applications include airplane exhaust stacks, welded tanks for chemicals, heat resistors, jet engine parts, expansions bellows, etc.

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SS 409

It is the lowest alloyed straight Chromium ferritic stainless steel. It replaces carbon steels where some amount of heat or corrosion. resistance and higher strength are required and where appearances secondary. It is used for fins in heater tubes, transformer and capacitor cases, dry fertilizer spreaders, automotive exhaust systems including mufflers, resonators, silencers, pipes and emission control units, high pressure agricultural spray tanks, culverts, shipping containers and firm equipment.

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SS 410/410S

SS 410 is the most commonly used 12% Chromium martens tic stainless steel. Excellent combination of toughness and strength can be developed through proper heat treatment. This steel has better corrosion. resistance in the hardened condition. It is a good choice when good formability and high strength are required and the end use demands resistance to mildly corrosive environment. It is used for furnace parts and burners operating below 650 Degree Centigrade, micrometer parts, tray supports, caps and vaporizers in petroleum fractionating towers, lining for reaction chambers, coal screens, fishing tickles, keys, lamp brackets, rules and tapes, wall screens, steam turbine buckets, blades, bucket covers, pump parts, petrochemical equipment and press plates. Type SS410 S is a low carbon modification of SS 410.

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SS 420
This steel contains min. 0.15 % C and 12% Cr. It can be thermally hardened to develop very high strength. Extremely useful for cutlery. Other applications include vegetable choppers, scissors, shears, tweezers, hand tools, dental and surgical instruments, etc.

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SS 430

SS 430 with 19% Cr. is inferior to SS 304 as regards deep drawablity. Though it does not have good corrosion resistance properties as Cr-Ni steels, it is used under less corrosive atmospheres for chemical processing equipment, furnace parts, heat exchangers, oil burner parts, petroleum refining equipment, pyrometers, protection tubes, recuperates, rubber plant machinery, scientific apparatus, storage vessels, tubing, television cones, electrical appliances, solar water heaters, air conditioners, kitchenware, household appliances, decorative trims, parts for washing machines etc.

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SS 434

A ferritic stainless steel similar to SS 430 but containing about Mo. It has better corrosion resistance than SS 430. It is widely used for exterior automotive moulding and trims and applications where improved corrosion. resistance to pitting attack from various de-icing chemicals is required.

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