Material difference between 304 and 316 stainless steel

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Update time : 2020-01-10 09:35:21
1. Different degrees of corrosion resistance: 316 stainless steel contains Mo, which is better than 304 stainless steel in the high-temperature environments. Therefore, in the high-temperature environment, engineers generally choose 316 parts. 316 is mainly to reduce Cr content and increase Ni content and mo2% ~ 3%. Therefore, its corrosion resistance is stronger than 304, which is suitable for use in the chemical industry, seawater and other environments.

2. According to the brand number, the materials are different: 304 stainless steel corresponds to Chinese brand 0cr18ni9316 stainless steel corresponds to Chinese brand 0Cr17Ni12Mo2.

3. Price difference: SS316 cost is also higher than SS304, generally SS316 is used in places with high requirements to replace SS304.




Generally speaking, 316 stainless steel is a kind of austenitic stainless steel. Due to the addition of the Mo element, its corrosion resistance and high-temperature strength are greatly improved. The high-temperature resistance can reach 1200-1300 degrees, which can be used under bad conditions.
Its main uses are heat exchanger, dyeing equipment, film processing equipment, pipeline, and materials for the exterior of buildings in coastal areas, etc.
304 stainless steel is a common material in stainless steel, with a density of 7.93 g / cm3, also known as 18 / 8 stainless steel in the industry. High-temperature resistance 800 ℃, with good processing performance and high toughness, is widely used in industry, furniture decoration industry and food and medical industry.
0Cr18Ni9 and SUS304 are the common marking methods on the market, of which 0Cr18Ni9 generally refers to the production of national standard, 304 generally refers to the production of ASTM standard, and SUS 304 refers to the production of Japanese standard.
304 is a kind of universal stainless steel, which is widely used to make equipment and parts requiring good comprehensive performance (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 18% chromium and more than 8% nickel. 304 stainless steel is a brand of stainless steel produced according to the American ASTM standard.
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