SUS304L is an austenitic stainless steel specified in "JIS g 4303 stainless steel bar". SUS304L is an ultra-low carbon steel with lower carbon (c) content than SUS304. It has excellent intergranular corrosion resistance and is also used for parts that cannot be heat treated after welding. The grade of stainless steel with L at the end is also called l grade. Compared with stainless steel without L, the corrosion resistance of stainless steel with L at the end is less likely to decrease due to the decrease of Cr concentration during heating. Therefore, SUS304L is used to make the equipment and pipeline more sensitive during operation and avoid the corrosion caused by it. In other words, the choice of SUS304L is significant to ensure the corrosion resistance of the equipment. The hardness of SUS304L is below HB: 187 under solution heat treatment. The specific gravity is 7.93.
Mechanical properties of SUS304L stainless steel
The mechanical properties of SUS304L under solution heat treatment are hardness (HB): 187, strength: 175 n / ㎟ or more, tensile strength: 480 n / ㎟ or more, elongation: 40% or more, tensile strength: 60% or more.
Machinability / characteristics SUS304L stainless steel has good ductility and toughness, good cold workability such as deep drawing and bending, and excellent weldability. In addition, it has excellent corrosion resistance and excellent performance at low temperature and high temperature. Because of these excellent properties, they have a wide range of applications, and are widely used in household products, construction, automotive parts, chemical industry, food industry, synthetic fiber industry, nuclear power generation, LNG plant, etc. The carbon content of SUS304 is usually about 0.06%, but SUS304L is reduced to 0.03%. Chromium makes stainless steel antirust, but when the stainless steel is heated to about 600 ° C to 800 ° C, the carbon in the material will react with chromium to form chromium carbide. This is a stainless steel grade, and its purpose is to reduce the carbon combined with chromium, because the chromium in it is consumed, the concentration of chromium is reduced, and the corrosion resistance is also reduced. SUS304L stainless steel is used in food equipment, nuclear power, chemical industry, oil refining, paper making, etc.