The dielectric 304 stainless steel is a common stainless steel, also known as 18/8 stainless steel in the industry. Its corrosion resistance superior to 430 stainless steel, but the price surpasses 316 stainless steel cheaper, it is widely used in the life, for example: high-grade stainless steel cutlery, outdoor railings. Although such stainless steel in the country is very common, but this title "304 stainless steel" from the United States. Many people think that the 304 stainless steel is called a model in Japan, but the strict sense of the terms, Japan formally known as "SUS304 304 stainless steel. 304 is a versatile stainless steel, it is widely used to produce good overall performance 
 304 Atlas, 304 various types (7) of equipment and parts (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 16% chromium, a nickel content of more than 8%. 304 stainless steel is produced in accordance with the American ASTM standard stainless steel grades. 304 is equivalent to of 0Cr18Ni9 [According to GB / T 20878-2007 now change 06Cr19Ni10】 stainless steel. 
 Component of basic information 
 Chemical grade 304 stainless steel the old 06Cr19Ni10 grades (0Cr18Ni9) 19% chromium, and nickel-containing 8-10%. 304 stainless steel is the most widely used stainless steel, heat resistant steel. For food production equipment, common chemical equipment, nuclear energy. 304 stainless steel chemical composition C Si Mn PS Cr Ni (nickel) Mo, chemical composition (SUS304) ≤ 0.08 ≤ 1.00 ≤ 2.00 ≤ 0.05 ≤ 0.03 18.00-20.00 8.00 ~ 10.50 
 Density 
 Stainless steel SUS304 density of 7.93 g/cm3 
 Product standards 
 For 304 stainless steel is a very important parameter directly determines its corrosion resistance, and also determine its value. The 304 most important element is Ni, Cr, but it is not limited to these two elements. The specific requirements of product standard requirements. The industry common judgment situation think that as long as the Ni content of more than 8% Cr content greater than 18%, that is 304 stainless steel. This is why the industry will kind of stainless steel called 18/8 stainless steel. In fact, the product standard 304 has very clear provisions of these product standards for different shapes of stainless steel, there are some differences. Here are some common product standards and testing. 
 304 stainless steel determination 
 To determine if a material is not 304 stainless steel, and must meet the requirements of Standard product of each element, as long as one is not found, can not be called a 304 stainless steel. ASTM A276 Type (Standard Specification for Stainless Steel Bars Bars and Shapes profile) 304 C Mn PS Si Cr Ni 
 Requirements,% 0.08 2.00 0.045 0.030 1.00 18.0-20.0 8.0-11.0 
 ASTM A240 (Chromium and Chromium-Nickel Stainless Steel Plate Plate, Sheet sheet, and Strip Strip for Pressure essels and for General Applications) 304 C Mn PS Si Cr Ni N 
 Requirements,% 0.07 2.00 0.045 0.030 0.075 17.5-19.5 8.0-10.5 0.10 
 JIS G4305 cold-rolled (cold-rolled stainless steel plate sheet, sheet sheet and strip strip) the SUS 304 C Mn PS Si Cr Ni 
 Requirements,% 0.08 2.00 0.045 0.030 1.00 18.0-20.0 8.0-10.5 
 JIS G4303 (Stainless steel bars, stainless steel rods) the SUS 304 C Mn PS Si Cr Ni 
 Requirements,% 0.08 2.00 0.045 0.030 1.00 18.0-20.0 8.0-10.5 
 These four standard just a few of the common standard, in fact, ASTM and JIS standards mentioned 304 more than a few. Each standard is actually 304 requirements vary, so in order to determine if a material is not 304 accurate expression should be said that whether a product standard 304 requirements,