Stainless Steel 347 ERW Pipes

347 Stainless Steel ERW pipes have a chemical composition that includes an austenitic structure with chromium, nickel, and columbium (or niobium) alloy. The chromium content in this stainless steel grade ranges from 17 to 20%, while the nickel content is between 9 and 13%. Columbium (or niobium) helps improve its high-temperature properties and stability, preventing carbide precipitation during welding. Additionally, it contains small amounts of carbon, silicon, manganese, phosphorus, sulfur, and nitrogen, all of which enhance its overall properties and performance. The composition of Stainless Steel 347 ERW pipes makes them suitable for use in high-temperature applications and corrosive environments.

Stainless Steel 347 ERW pipes have a wide range of uses due to their unique properties. They are primarily used in high-temperature applications such as heat exchangers, boilers, and condensers in petrochemical, power generation, and oil and gas industries. They are also commonly used in the chemical and pharmaceutical industries, where they are required to resist corrosion in corrosive environments.

The properties of Stainless Steel 347 ERW pipes make them ideal for high-temperature applications. They have good high-temperature strength, excellent resistance to oxidation, and good stability against carbide precipitation during welding. Additionally, the high chromium and nickel content in their chemical composition provides excellent corrosion resistance against a wide range of media, including sulfuric acid.

In summary, SS 347 ERW pipes offer a combination of high-temperature strength, corrosion resistance, and stability during welding, making them ideal for use in high-temperature and corrosive environments in various industries.