What is the difference between 304 stainless steel and 316 stainless steel?

Differences: 1. Different degrees of corrosion resistance: 316 stainless steel contains MO, which has better corrosion resistance than 304 stainless steel in a high-temperature environment, so in a high-temperature environment, engineers generally choose 316 material parts.

316 is mainly to reduce the CR content, increase the Ni content, and increase the MO2% 3%. Therefore, its corrosion resistance is stronger than that of 304, and it is suitable for use in chemical, seawater and other environments.

2. The material is different depending on the grade: 304 stainless steel corresponds to the Chinese brand 0Cr18Ni9, and 316 stainless steel corresponds to the Chinese brand 0Cr17Ni12Mo2.

3. ** Different: the cost of 316 is also higher than that of 304, and generally 316 is used in places with higher requirements to replace 304.

Extended information: 316 stainless steel is an austenitic stainless steel, due to the addition of MO elements, its corrosion resistance and high temperature strength have been greatly improved, and the high temperature resistance can reach 1200-1300 degrees, which can be used under harsh conditions.

The main uses are pulp and paper equipment, heat exchangers, dyeing equipment, film processing equipment, pipes, and materials for the exterior of buildings in coastal areas. In 2013, it was also used in the field of solenoid valves, mainly used for housings, clamps, balls, valve bodies, valve seats, nuts, valve stems, etc.

304 stainless steel is a common material in stainless steel, with a density of:

G cm3, also known as 18 8 stainless steel in the industry. High temperature resistance 800, with good processing performance, high toughness characteristics, widely used in industry, furniture decoration industry and food and medical industry.

There are 0Cr18Ni9 and SUS304 in the common labeling methods on the market, of which 0Cr18Ni9 generally represents the national standard production, and 304 generally represents the ASTM standard production and SUS

304 indicates the standard production of the Japanese standard.

It is a general-purpose stainless steel, which is widely used in the production of equipment and parts that require good comprehensive properties (corrosion resistance and formability). In order to maintain the corrosion resistance inherent in stainless steel, the steel must contain more than 18% chromium and more than 8% nickel. 304 stainless steel is a grade of stainless steel produced in accordance with the American ASTM standard.

The characteristics are different 304 stainless steel has good processing performance and high toughness, while 316 stainless steel adds molybdenum elements, which has better corrosion resistance, atmospheric corrosion resistance and high temperature strength, and better use effect. 2.The application field is not the same: 304 stainless steel is widely used in industrial and home decoration industries and food and medical industries; 316 stainless steel is widely used in equipment, oxalic acid, fertilizer and other production equipment and other industries.

3.The chemical material is different 304 stainless steel is cover stainless steel, the material of the composition is OCR18Ni9, the 316 stainless steel is austenitic stainless steel, and the material of the composition is OOCR12MO2TI.

The main differences are as follows:

First, the difference in the main components of metals.

Both 304 stainless steel and 316 stainless steel contain about 16 18% chromium, but 304 stainless steel contains an average of 9% nickel, while 316 stainless steel contains an average of 12% nickel. Nickel can improve high-temperature durability, improve mechanical properties, and improve oxidation resistance in metal materials. Therefore, the nickel content of the material directly affects the comprehensive properties of the material.

Second, the difference in material properties.

304 (0Cr18Ni9) stainless steel is an austenitic stainless steel, which cannot be strengthened by heat treatment, cannot be quenched like carbon steel, and is not magnetic. 304 has excellent mechanical properties, has considerable corrosion resistance, high temperature resistance, and is most widely used as a stainless heat-resistant steel.

316 (0Cr17Ni12Mo2) stainless steel is the second most widely used steel after 304, the main characteristics are acid and alkali resistance, high temperature resistance is stronger than 304, mainly used in the food industry and surgical equipment, and 316 stainless steel also has a significant feature, that is, there is basically no thermal expansion and contraction, which is extremely important for precision parts.

Third, the use of the two is different:

304 stainless steel is widely used in the manufacture of equipment and parts that require good overall properties (corrosion resistance and formability). The main uses of 316 stainless steel are pulp and paper equipment, heat exchangers, dyeing equipment, film processing equipment, pipes, and exterior materials for buildings in coastal areas. In 2013, it was also used in the field of solenoid valves, mainly used for housings, clamps, balls, valve bodies, valve seats, nuts, valve stems, etc.