Grade 304 stainless steel is the most versatile and the most widely used of all stainless steels. Its chemical composition, mechanical properties, weldability and ncorrosion/oxidation resistance provide the best all-round performance stainless steel at relatively low cost. It also has excellent low temperature properties and responds well to hardening by cold working. If intergranular corrosion in the heat affected zone may occur, it is suggested that 304L stainless ateel welded pipe  be used.

Specifications:

ASTM A312 Standard Specification for Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

ASTM A790 Standard Specification for Welded Ferritic/Austenitic Stainless Steel Pipe

ASME SA213 Seamless Ferrite and Austenitic Alloy Steel Pipe for Boiler, Superheater and Heat Exchanger

ASME SA249 Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes

ASME SA789 Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes

GB/T14976-2002 Stainless steel seamless tubes for fluid transport

GB/T12771-2008 Stainless steel welded tubes for fluid transport