Introduction
304L stainless steel, also known as ultra-low carbon stainless steel, is a versatile stainless steel material that is widely used to make equipment and parts that require good comprehensive performance (corrosion resistance and formability).
304L is a variant of 304 stainless steel with a lower carbon content and is used where welding is required. The lower carbon content minimizes the precipitation of carbides in the heat-affected zone close to the weld, and the precipitation of carbides may cause intergranular corrosion (welding erosion) of stainless steel in certain environments.
Chemical components(%)
Composition  | C  | Si  | Mn  | P  | S  | Cr  | Ni  | 
Min  | \  | \  | \  | \  | \  | 18.00  | 8.00  | 
Max  | 0.03  | 1.00  | 2.00  | 0.035  | 0.03  | 20.00  | 12.00  | 
Mechanical properties
Rigidity  | Tensile strength  | Yield strength  | Elongation  | 
≤187  | ≥520MPa  | ≥205MPa  | ≥40%  | 
Physical properties
Density  | Melting points  | Specific heat  | Magnetism  | Resistivity  | Thermal conductivity  | Linear expansivity  | 
7.93g/cm3  | 1398-1420℃  | 0.502J/(g.℃)  | \  | 0.73Ω·mm²/m(20℃)  | 16.3W/(m.k)(100℃)  | 16.0×10-6/K(20-100℃)  | 
304L Stainless steel Available products and Standard
Round bars/Wires  | ASTM A276,ASTM A314  | 
Sheet/Plate/Strip  | ASTM A240  | 
Seamless and Welded Tubes/Pipes  | ASTM A312(for high-temperature and general corrosive service) ASTM A269 (Seamless and Welded Austenitic Stainless Steel Tubing) ASTM A213 (Seamless Steel Boiler,Superheater,and Heat-Exchanger Tubes)  | 
Flanges/Fittings/Valves/Parts  | ASTM A182  | 
Applications
n Food processing equipment, particularly in beer brewing, milk processing, and wine making
n Kitchen benches, sinks, troughs, equipment, and appliances
n Architectural trim and molding
n Automotive and aerospace structural use
n Construction material in large buildings
n Chemical containers, including for transport
n Heat exchangers
n Nuts, bolts, screws, and other fasteners in the marine environment
n Dyeing industry
n Woven or welded screens for mining, quarrying & water filtration
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