In the 21st century, it is necessary for all nations to protect the environment from pollution. This leads to a greater demand for “sustainable steel”. Sustainable steel can be defined as any kind of metal that prolongs the durability and usability of the tool at top condition without requiring much maintenance and repair work. The demand has increased especially in developing countries because these countries are starting to utilize metal tools more frequently in daily lives due to advancement in technology and communication systems through electronic appliances and communication devices (Johnston, 2015). Consequently, many companies around world arose in an attempt to meet this high demand. SUS304 VS SS304 Stainless Steel
There are two main types of metals that can be used as sustainable steel, SUS304 VS SS304 Stainless Steel they are SUS stainless steel and S/S (stainless steel) steel. SUS stands for “stainless steel” and S/S or S/S metal indicates “stainless steel” since it is short for the word. These metals got their names because they possess properties which allow them to decrease surface oxidation rates. Surface oxidation rates speed up when exposed to air and water causing the metal’s color to change into dark grayish shade instead of its original silver appearance due to excessive damage on its atoms’ outer layers (Johnston, 2015). SUS304 VS SS304 Stainless Steel SUS steel is made of S/S with added chromium and nickel, which are elements that can speed up surface oxidation rates. These two metals decrease the rate at which the S/S atoms oxidize by creating a thin layer on SUS metal’s surface to protect it from air and water damage. Chromium and nickel both contain strong bonds in their atomic structure which tightly hold together the protection layer they formed on SUS surfaces (Mike, 2003).
SUS stainless steel includes SUS316, SUS321, SUS430, SUS434 and SUS440C. SS 304 stainless steel is a common grade of austenitic chromium-nickel steel used for its excellent corrosion resistance and easy formability. The nominal composition of 304 stainless steels is 18% Chromium and 8% Nickel with a carbon content of 0.08%. A high-quality austenitic chromium nickel material with physical properties which are more useful in the service industry.
In order to make supply chain management more efficient many manufacturers will combine SAE/AISI numbers to cover multiple variations on a SUS SAE SUS304 stainless steel is a SUS SAE SUS 304 stainless steel. SAE stands for Society of Automotive Engineers and AISI stands for American Iron & Steel Institute.
In the United States, SUS SAE SUS304 stainless steels are defined by ASTM A276-04a “Standard Specification for Precipitation-Hardening Stainless Steel Sheet and Strip for Pressure Vessels.” In Europe it’s referred to as EN 10020 which specifies the mechanical properties of austenitic stainless steel plates, sheets and strip for pressure vessels. This SAE SAE 304 material specification covers four grades of 18% chromium 8% nickel steels which contain sulfur in concentrations up to 0.
