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309 Stainless Steel and 309S Stainless Steel
309 Stainless Steel and 309S are austenitic chromium-nickel stainless steels that give phenomenal corrosion resistance and warmth resistance in addition to great quality at room and lifted temperatures. Sort 309S Stainless Steel is indistinguishable to Type 309 aside from a lower carbon content that minimizes carbide precipitation and enhances weld-ability. They are basically non-magnetic as toughened and get to be daintily attractive when icy lived up to expectations.
Bhandari Metal Tubes Alloy 309/309S (UNS S30900/S30908) in sheet, sheet coil, plate, round bar, etc.
Grade 309 Stainless Steel is utilized frequently for higher temperature applications. While its oxidation resistance surpasses that of composite 310, its imperviousness to consumption is identical to that of compound 310. Compound 309 is exceedingly weld able and frosty form able, in spite of the fact that it does oblige stronger framing machines and persistently expanding weight. Regular machining routines are utilized for stainless steel review 309, however it is harder and does have a tendency to solidify all the more rapidly. Like 310 Stainless Steel, Grade 309 Stainless Steel has a high chromium and nickel content which concedes amazing imperviousness to watery corrosion.
309 is an austenitic warmth safe composite with oxidation imperviousness to 1900°F under consistent temperature conditions. At the point when incessant warm cycling is included, the compound is impervious to around 1850°F. The high chromium and generally low nickel substance of 309 give great imperviousness to high temperature sulfur bearing climates. 309 has just direct imperviousness to carbon retention and is not proposed for utilization in exceedingly carburizing environments.
Regularly in numerous item structures, the grain size and carbon substance can meet both the 309S and 309H necessities. Drawn out introduction to the 1100-1600°F temperature reach will result in some sigma to structure, bringing down room temperature malleability and effect resistance. Should sigma arrangement be foreseen, consideration ought to be taken to maintain a strategic distance from substantial mechanical effect at room temperature. 309 has a machinability rating of 43% in respect to AISI B1112 steel. Room temperature framing is proposed. Weld with AWS E309-16 secured anodes or ER309 exposed wire.
The following specifications cover Stainless Steel 309 :
• AISI 309
• ASTM A167
• ASTM A249
• ASTM A276
• ASTM A473
• ASTM A479
• DIN 1.4828
• UNS S30900
309 Stainless Steel Resistance :
Corrosion Resistance :
• Give magnificent Corrosion Resistance
• More impervious to marine environments than Alloy 304
• Regularly utilized at higher temperatures to exploit their oxidation resistance
• Have high imperviousness to sulphite mixers
• By and large considered warmth safe alloys
• Damaging scaling temperature is roughly 2000°F
• Great scaling resistance with respect to consistent and irregular administration.
High Temperature Corrosion :
Alloy 309 resists high temperature corrosion in most in-service conditions. Operating temperatures are as follows:
Oxidizing conditions (max. sulfur content–2 g/m3)
• 1922°F (1050°C) continuous service
• 2012°F (1100°C) peak temperature
Oxidizing conditions (max. sulfur greater than 2 g/m3)
• 1742°F (950°C) maximum temperature
Low oxygen atmosphere (max. sulfur content–2 g/m3)
• 1832°F (1000°C) maximum temperature
Nitriding or carburizing atmospheres :
• 1562–1742°F (850–950°C) maximum
The alloy does not perform as well as Alloy 600 (UNS N06600) or Alloy 800 (UNS N08800) in reducing, nitriding or carburizing atmospheres, but it does outperform most heat resistant stainless steels in these conditions.
Heat Treatment :
Grade 309 stainless steel is tempered at 1038–1121°C (1900–2050°F) took after by extinguishing in water.
Weldability
Grade 309 stainless steel can be welded utilizing combination or resistance welding strategies. Oxyacetylene welding system is not favoured for welding this alloy.
Fabrication
Can be move shaped, stamped, and drawn promptly. In procedure strengthening is frequently needed to lessen hardness and build ductility.
309 stainless steel Applications:
• Annealing covers and boxes
• Heating elements
• Carbon saggers
• Aircraft and jet engine parts
• Waste incinerators
• Heat exchangers
• Pulverized coal burners
• Carburizing annealing products
• Brazing fixtures
• Sulfite liquor handling equipment
• Lead pans, neutral salt pots
• Kiln liners
• Muffles, retorts
• Boiler baffles
• Furnace fans and shafts
• Refinery and chemical processing equipment
• Radiant tubes for aluminum and steel annealing
• Auto exhaust parts
• Glass forming equipment
• Thermowells
• Paper mill equipment
• Power boiler tube hangers
• Rotary kilns and calciners
• Anchor bolts
Stainless Steel Product Range: