ASTM B677 is a ASTM International standard specification that covers seamless, cold-worked or hot-finished nickel alloy pipe and tube intended for general corrosive service. It defines the requirements for materials designated by various UNS numbers, such as UNS N08904 (904L Stainless Steel), UNS N08925, and UNS N08926, which offer enhanced resistance to corrosion due to their specific alloy composition.

ASME SA213 specification covers seamless ferritic and austenitic steel boiler, superheater, and heat exchanger tubes. It defines the chemical composition, mechanical properties, and dimensional requirements of the tubes

ASTM A269 TP316 is a standard that specifies requirements for welded and seamless austenitic stainless steel tubing for general corrosion-resisting and low- or high-temperature service, with "TP316" designating the specific Type 316 stainless steel grade. This material contains molybdenum, which enhances its resistance to pitting and crevice corrosion in chloride-rich environments, making it suitable for applications in the chemical, marine, and hydraulic industries.

1.4521 stainless steel, also known as X2CrMoTi18-2 or AISI 444, is a ferritic, molybdenum-containing stainless steel characterized by its high resistance to chloride-induced stress-corrosion cracking and excellent resistance to pitting and crevice corrosion. And it comes in a variety of forms, including sheet, plate, coil, rod, tube and fittings.

Stainless steel 1.4401 is also known as grade 316 and is superior to 1.4301 (grade 304) due to its addition of molybdenum, which significantly enhances its corrosion resistance, particularly in harsh environments like those with seawater or chemicals.

The price per kg of stainless steel 316L sheets depends on factors such as material thickness, surface finish, market nickel and molybdenum prices, and order quantity.