Stainless Steel 904L (UNS N08904) is a super austenitic alloy that offers moderate to high corrosion resistance and ability to sustain in a wide range of process conditions. Stainless Steel 904L is the combination of high chromium 4.5% and nickel 25% content. Addition to these, grade 904L contains traces of molybdenum and copper which offers excellent corrosion resistance. The material shows high molybdenum and low carbon content. Copper present in the alloy dramatically increases resistance to strong reducing acids. Addition of the aluminium allows for the formation of a continuous, homogenous self-repairing subscale.
What are the features of Stainless Steel 904L Pipes?
The well-defined composition of Stainless Steel 904L pipes provides outstanding stress corrosion cracking resistance against chloride condition. Besides, they offer pitting and general corrosion resistance compared to stainless steel grade 316L and 317L. Stainless Steel 904L Pipes are designed to withstand in an environment having traces of dilute sulfuric acid. The material quality, i.e., stainless stel 904L offers outstanding resistance to inorganic acids such as hot phosphoric acid and the majority of organic acids. Stainless Steel 904L material quickly went through the process of welding and fabrication practices. Stainless Steel 904L Pipes are formable and maintain non-magnetic state in varied conditions. The stainless steel 904L Pipes are rigid and workable even below the zero temperatures with its austenitic structure.
What are the different types of Stainless Steel 904L Pipes?
Stainless Steel 904L Pipes are available in the seamless and welded form. The seamless pipes follow ASTM B677, ASME SB677 specifications. In contrast, 904L Welded Pipe follows ASTM B673 / 674, ASME SB 673 / 674 specification.
What are the working abilities of Stainless Steel 904L Pipes?
Hot-working of Stainless Steel 904L Pipes is performed in the temperature range 1200 Degree C to 900 Degree C. The process is then followed by water quenching and rapid air cooling. Stainless Steel 904L Pipes cannot undergo through forming a circle in the temperature range of 600 Degree C to 800 Degree C. These 904L grade of pipes shows oxide scale formation and improves the adhesion spalling resistance. For joining two Stainless Steel 904L Pipes, air gas works well, which reduces the likeliness of weld solidification cracks.
What are the applications of Stainless Steel 904L Pipes?
Stainless Steel 904L Pipes are suitable in air pollution control systems, coal-fired power plants. Besides, in chemical processing equipment, metallurgic processing and in oil and gas production plant.