The 304L #4 finish stainless steel sheet is a variation of chromium-nickel alloys. It has 18 percent chromium and 8 percent nickel. It has a low carbon content, which makes it safe for use in most welding construction operations. Because it has lower carbon (max of 0.03 to 0.08 percent), it reduces the formation of carbide precipitation caused by welding. It is also resistant to rust and intergranular corrosion. This grade of metal doesn’t require annealing after welding is performed, unless the application requires stress relief. It has great machinability and formability. This grade of steel can also be stamped and deep drawn, creating sinks, saucepans, and other hollow-ware.
The high corrosion resistance properties of this metal enable it to be used in various industries that include textile, chemical, food, and atmospheric and food industries. It is capable of being deep drawn and formed into complex shapes because of its low yield strength and high elongation. When worked, this metal hardens rapidly. Air cooling is all that’s needed in most cases. In order to relieve stresses caused by spinning or forming, it can be stress relief annealed or full annealed once forming is done.
This grade of metal has great weldability. Commercial welding methods can be used, such as fusion and resistance welding. In order to prevent hot cracking from occurring, it’s necessary to ensure the formation of ferrite within the weld deposit. Uniform temperatures are needed when forming this metal, which should be done at no higher than 2300 degrees F and not below 1700 degrees F. When deep drawing 304L metals, no intermediate annealing is needed.
This product is available is sizes between 0.0178 and 0.1874 inches thick, 48 and 60 inches wide and up to 144 inches long.