Alloy 309 (UNS S30900) austenitic stainless steel is typically used for elevated temperature applications. Its high chromium and nickel content provides comparable corrosion resistance, superior resistance to oxidation, and the retention of a larger fraction of room temperature strength than the common austenitic Alloy 304. General Properties Alloy 309 (UNS S30900) is an austenitic stainless steel developed for use in high temperature corrosion resistance applications. The alloy resists oxidation up to 1900°F (1038°C) under non-cyclic conditions. Frequent thermal cycling reduces oxidation resistance to approximately 1850°F (1010°C). Because of its high chromium and low nickel content, Alloy 309 can be utilized in sulfur containing atmospheres up to 1832°F (1000°C). The alloy is not recommended for use in highly carburizing atmospheres since it exhibits only moderate resistance to carbon absorption. Alloy 309 can be utilized in slightly oxidizing, nitriding, cementing and thermal cycling applications, albeit, the maximum service temperature must be reduced. When heated between 1202 – 1742°F (650 – 950°C) the alloy is subject to sigma phase precipitation. A solution annealing treatment at 2012 – 2102°F (1100 – 1150°C) will restore a degree of toughness. 309S (UNS S30908) is the low carbon version of the alloy. It is utilized for ease of fabrication. 309H (UNS S30909) is a high carbon modification developed for enhanced creep resistance. It most instances the grain size and carbon content of the plate can meet both the 309S and 309H requirements. Alloy 309 can be easily welded and processed by standard shop fabrication practices. STANDARDS INDUSTEEL TRADEMARKS UNS ASTM EURONORMS EN SUS 4828 (Prev. S12) S30900 309 1.4828 SUS 309TB Standard ASTM, AISI, ASME, JIS, SUS, DIN, EN, GB, BS specification 1000mm*2000mm 1219mm* 2438mm or as your requirement Surface 2B/cold rolled, hot rolled, hairline, mirror type Sheet/Plate, Pipe/Tube, Bar/Rod, Coil, Strip, wire, fitting ect Thickness 0.3mm~50mm or as your requirement Usage Plate heat exchanger, bellows, household goods (1, 2 tableware, cabinets, indoor pipes, water heaters, boilers, bath), auto parts (windshield wipers, muffler, moldings), medical equipment, building materials, chemical, food industry , agriculture, ship parts, and so on. Packing interleaving paper kraft paper and wooden pallet Delivery Time 10 days after received the deposit of T/T 10 days after received the deposit of L/C original We can customize the size you need, please feel free to contact us! Grade Chemical composition C≤ Si≤ Mn≤ P≤ S≤ Ni Cr 309 0.2 1.00 2.00 0.04 0.03 12.00-15.00 22.00-24.00 309S 0.08 1.00 2.00 0.045 0.03 12.00-15.00 22.00-24.00