What is austenitic stainless steel pipe?

23 May,2025

　　Austenitic Stainless Steel Pipe
　　Austenitic stainless steel pipes have a stable austenitic structure at room temperature, containing about 18% Cr, more than 8% Ni, and approximately 0.1% C. They possess high corrosion resistance, good cold workability, and excellent toughness, plasticity, weldability, and non-magnetic properties. They are widely used in heat exchangers, non-magnetic condensers, evaporators, and fluid transportation in industries such as chemical, refining, boilers, and food. We specialize in producing nickel-based alloys, duplex steel, stainless steel, and marine seamless pipes, with main materials including 304, 304L, 316L, 310S, 321/H, 347/H, 904L, 254SMo, S31803, S32205, S32750, N02200, N04400, N06600, N06625, N08800, N08825, N10276, etc. Special materials and non-standard specifications can be customized. The company currently holds the TS-A1 grade special equipment production license, ISO9001, ISO14001, OHSAS18001 management systems, pressure equipment manufacturing licenses recognized by the EU, Germany, Russia, and factory approval certificates from multiple classification societies including ABS, BV, CCS, DNV-GL, LR, enabling us to provide high-quality and cost-effective products to customers worldwide. Our exports reach Europe, America, Russia, Australia, Southeast Asia, South Africa, and other parts of the world.
　　Main Grades
　　304 Series: 304, 304L, 304H, 304LN
　　316 Series: 316, 316L, 316H, 316LN, 316Ti
　　310 Series: 310S, 310H
　　317 Series: 317, 317L
　　347 Series: 347, 347H, 347HFG
　　Classification
　　This diagram shows the classification and evolution path of austenitic stainless steel pipes. Based on 18Cr-8Ni, 304 stainless steel (C<0.08%) can form improved grades by adding different alloying elements, such as 321 (+Ti) and 347 (+Nb) to enhance intergranular corrosion resistance, 316 (+Mo) to improve corrosion resistance, and 310 (+Cr+N) to enhance high-temperature oxidation resistance. H grades (C 0.04-0.10%) (TP304H, TP321H, TP347H, TP316H) are suitable for high-temperature environments, with TP347HFG further strengthening high-temperature strength through heat treatment. Additionally, TP310HcBN (+Nb+N) and UNS S30432 (+Cu+N) offer stronger heat and corrosion resistance, suitable for specific industrial applications.