![]() Mechanical Properties ASTM A276 Grade 18/8 SS Mechanical PropertiesĪnnealed, Cold finished, Dia ≤ 1/2 in (12.7mm)Īnnealed, Cold finished, Dia > 1/2 in (12.7mm)įor more data sheet of grade 18-8 material, you can view 304 Stainless Steel Properties. Physical Properties Grade 18-8 SS Physical Properties Chemical Composition Grade 18-8 Stainless Steel Composition, % Grade 18-8 SS material is non-magnetic in the annealed condition, but may be slightly magnetic after cold working. Grade 18-8 stainless steel density is 7.93 g/cm3 (0.286 lb/in3), yield strength at 0.2% is minimum 30 ksi (205 MPa), tensile strength is minimum 75 ksi (515 MPa), maximum Brinell hardness is 201 HB, maximum Rockwell hardness is 92 HRB. In 1930s, AISI decided on a three-digit numbering system for stainless steels, 18-8 was named type 304 stainless steel. Before stainless steel was standardized, grade 18/8 was used as the trade name of many steel companies. The first production of this alloy in the United States was not until 1927. It was first introduced in America during a symposium held by ASTM in 1924. Its precursor is 20-7 stainless steel, invented by German metallurgists Benno Strauss and Eduard Maurer. Let’s find out the major differences between these two grades 304 vs 316 stainless steel.18/8 stainless steel means the composition of stainless steel containing 18% chromium and 8% nickel. What are the differences between 304 and 316 stainless steel?įrom the above discussion, we know about the 304 and 316-grade stainless steels. Marine environments, especially those with chlorides present.Food and Beverage processing facilities with extreme environments.Heavy industrial, Chemical processing and storage equipment.Molybdenum is a transition metal and has high. ![]() This increase in molybdenum results in increased corrosion resistance. The main difference between 304 and 316 stainless steel is the fact that 316 stainless contains a significantly increased amount of molybdenum. Common applications of 316 grade stainless are: 316 Stainless Steel Contains a minimum of 16 chromium, 10 nickel and 2 molybdenum. So, 316 grades of stainless steel provide added corrosion resistance as compared to 304 grades. they also contain 2 to 3% molybdenum which increases the corrosion resistance further. Piping and piping components, etc What is 316 stainless steel?ģ16-grade stainless steel also contains a high amount of nickel and chromium.Kitchen equipment and appliances like diswasher, refrigerators, etc.The presence of high amounts of chromium and nickel provides excellent corrosion resistance and because of this 304 stainless steel is widely used in Manganese, silicon, and carbon are the other major allowing elements with the base metal as iron. What is 304 stainless steel?ģ04 grade of stainless steel is an austenitic grade of stainless steel alloy consisting of 18 to 20% chromium and 8 to 10.5% nickel. In the following section, we will find out the differences between 304 and 316 grades of stainless steel. At a quick glance, both 304 and 316 stainless steel grades may seem to be similar as there are many similarities in properties of both 304 and 316 grades. As per ISO 3506, 316 grade is popular as A4. According to use, the 316-grade stainless steel comes into the second position. It accounts for more than 50% of all stainless steel produced in this world. Also popular as A2 by the International Organization for Standardization ISO 3506 304-grade stainless steel is the most widely used SS grade. Both 304 and 316 stainless steels are austenitic grade stainless steels having very good corrosion resistance. ![]()
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