Stainless Steel: 1.4301 (304) and Sheet Plate (Quarto Plate & CPP)

Quarto Plate refers to hot-rolled plates over 12mm thick that have not been coiled during production. CPP, or Continuously Produced Plate, is up to 12mm thick and has been coiled during the rolling process. Sheet refers to cold-rolled material. Stainless steel types 1.4301 and 1.4307 are also known as grades 304 and 304L, respectively. Type 304 is highly versatile and widely used in stainless steel. It is sometimes referred to by its old name “18/8,” derived from its nominal composition of 18% chromium and 8% nickel. Type 304 stainless steel is an austenitic grade known for its capability for severe deep drawing, making it a dominant choice in applications like sinks and saucepans. Type 304L is the low carbon version of 304, used in heavy gauge components to improve weldability. Some products, such as plate and pipe, may be available as “dual certified,” meeting the criteria for both 304 and 304L. 304H, a variant with high carbon content, is also available for use at high temperatures.