UNS S32654 (XM-19) is an austenitic stainless steel made of super-austenitic material containing high levels of molybdenum, chromium, and nitrogen, with a low carbon content. This combination of elements helps to create a resistant structure that can withstand a range of corrosive environments, and it is a very popular material for applications in chemical, marine and power engineering.
UNS S32654 has very good pitting corrosion resistance, excellent stress corrosion resistance, good mechanical properties and high resistance to inter-granular corrisions and other forms of general and localized corrosion. It is particularly resistant to chloride crevice and stress corrosion cracking, which makes it ideal for chemical reactor and other container applications in acid-chloride and salt water environments.
UNS S32654 also has excellent machinability due to its low carbon content, making it easy to work with. This material is also used in the manufacturing of valves, pumps, piping systems, and gasketing. It is used prominently in onshore and offshore oil refineries and petrochemical plants, as well as in marine applications where salt and corrosive substances are present.
UNS S32654 is a very tough stainless steel that is resistant to a broad range of chemical and mechanical abuse. It has a relatively high yield strength and tensile strength, as well as excellent mechanical properties at elevated temperatures. This makes it suitable for applications ridden with high levels of heat and stress such as those in the power engineering fields.
UNS S32654 is not easy to fabricate due to its high levels of alloy components and thus it is commonly available in pre-fabricated forms. This material is also very popular for weld fabrications, particularly with the use of argon-rich shielding gases to avoid embrittlement and welding defects. The welding of this material requires great skill and its weldability depends largely on properties like the carbon content and inter-metallic precipitates of the heat affected zone.
Overall, UNS S32654 is a stainless steel of exceptional strength and durability and is designed to handle all kinds of corrosive environments. It is easily formable and machinable, allowing for many customizable applications. It is most popular in onshore and offshore oil and gas refineries, but is also widely used in the chemical and power engineering fields, as well as the marine industry.
