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. The most common type of stainless steel in use is grade 304. Physical Properties Grade 18-8 SS Physical Properties Chemical Composition Grade 18-8 Stainless Steel Composition, %
It is one of the most widely used and versatile grades, known for its excellent. 304 stainless steel is often referred to as '18-8' stainless steel due to its main alloying constituents being 18 chromium and 8 nickel. Grade 18-8 SS material is non-magnetic in the annealed condition, but may be slightly magnetic after cold working. This article will further discuss austenitic stainless steel, its definition, types, grades, properties, and applications. 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 chromium present in stainless steel forms a passive layer, which is a chromium-rich oxide film that prevents stainless steel from corroding. The first production of this alloy in the United States was not until 1927. Stainless steel is a generic term for a type of alloy that belongs to the corrosion resistant family of alloys that contain 10.5 or more chromium by mass. This grade of steel was developed as a stainless steel group that can resist oxidation and corrosion, specifically stress cracking corrosion (SCC). It is magnetic and not capable of hardening through heating. It was first introduced in America during a symposium held by ASTM in 1924. Ferritic steel is a type of steel that is composed of less than 0.10 carbon. Its precursor is 20-7 stainless steel, invented by German metallurgists Benno Strauss and Eduard Maurer. 18/8 stainless steel means the composition of stainless steel containing 18% chromium and 8% nickel.
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