1.4833 ss seamless tube

309S stainless steel is a high alloy stainless steel. Its composition contains less nickel than Type 310 and less carbon than Type 309. Reduced nickel provides better resistance to hydrogen sulfide, especially at high temperatures. Additionally, the lower carbon content in its composition allows 309S stainless steel to be used in areas where high-temperature gases may cause problems. Therefore, it is commonly used in the manufacture of furnaces, exhaust systems, and vessels that are exposed to high temperatures.

Another feature of Type 309S is its resistance to oxidation and creep, as well as its ability to withstand high temperatures. Due to the high content of nickel and chromium in its composition, humid environments have no effect on it. Therefore, it is often used in marine environments instead of stainless steel 304 due to its higher resistance.
Although Type 309S has excellent weldability, it does have a tendency to work harden.

309 stainless steel is often referred to as the higher carbon alternative to type 309H. Its high carbon content provides additional creep resistance. In addition to carbon, iron, chromium and nickel also constitute its main components. However, it is not uncommon for Types 309, 309S, and 309H to meet the requirements for all three variations of the stainless steel 309 grade.

Much like 309, Type 309H has high oxidation resistance. It is commonly found in areas where oxidation is avoided, including furnaces, paper mill equipment, and heat treatments. Applications often bring Type 309H into contact with acetic and citric acids, sulfur dioxide, and ammonia; concentrated acids are another common substance. The metal can be used in high-temperature environments and is also characterized by its ability to retain a greater portion of its strength at room temperature than many similar alloys.