ASTM A269 is a standard specification for seamless and welded austenitic stainless steel tubing used for general service in low or high-temperature environments. It covers various grades, such as TP304, TP304L, TP316, and TP316L, defining their chemical composition and mechanical properties like tensile strength, yield strength, and hardness. This standard also mandates specific tests to ensure the tubing meets the requirements for corrosion resistance and other applications.

ASTM A249 is a standard specification for welded austenitic steel tubes used as boilers, superheaters, heat exchangers, and condensers. It covers the chemical and mechanical requirements, testing, and quality control for these tubes, which are available in various grades like TP304, TP304L, and TP316L. The specification defines the size range, dimensional tolerances, heat treatment, and surface finish requirements for the tubes.

ASTM A790 is the Standard Specification for Seamless & Welded Ferritic/Austenitic Stainless Steel Pipe. Read more at Langley Alloys.

ASTM A240 is a standard specification for chromium and chromium-nickel stainless steel plates, sheets, and strips used in pressure vessels and general applications. It defines the chemical composition, mechanical properties, and other requirements for various stainless steel grades, ensuring they meet specific corrosion resistance and strength standards. This includes common grades such as 304, 316, and various duplex stainless steels.

Application fields 304 stainless steel is widely used in food, pharmaceutical, chemical, and construction fields. 409 stainless steel is mainly used in automotive, manufacturing, and construction fields, especially in automotive exhaust systems.

1.4408 is a cast stainless steel that contains molybdenum, which provides good resistance to general corrosion, but 1.4541's titanium stabilization makes it more resistant to intergranular corrosion, particularly after welding or exposure to high temperatures.