Regarding valve material
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I need help. Both SCS 13A and SUS 316 are stainless steels; what are the differences between them? Could you recommend any information on valve materials? The American standards, Japanese standards, and Chinese standards are so confusing.
SCS13A is a Japanese-standard material, equivalent to China’s 304 stainless steel. 304 stainless steel is a common type of stainless steel, with a density of 7.93 g/cm3; it is also known in the industry as 18/8 stainless steel. It can withstand high temperatures of up to 800 degrees, features good workability and high toughness, and is widely used in the industrial and furniture decoration industries as well as in the food and medical sectors. Common marking methods used in the market include 06Cr19Ni10 and SUS304; 06Cr19Ni10 generally indicates production in accordance with national standards, while SUS304 indicates production in accordance with ASTM standards. 304 is a general-purpose stainless steel that is widely used in manufacturing equipment and components that require good overall properties (corrosion resistance and formability). 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 grade of stainless steel produced in accordance with the American ASTM standards.
What about Sus316? What’s the difference, and which one is better?
SUS 316 is more expensive than SCS13A, and it has superior corrosion resistance compared to SCS13A; however, SCS13A performs better at extremely low temperatures
SCS13A is the grade for castings, equivalent to SUS304 for bars. SUS316 is the grade for bars. They are different things. In terms of specific advantages and disadvantages, for the same material, bars have better mechanical properties than castings.
SCS13A is Japanese-standard stainless steel, while 316 is Chinese-standard stainless steel; the nickel and chromium contents of these two materials differ. For information on the Chinese-standard material, refer to GB/T20878-2007 or GB/T12230-2005
Actually, the difference isn’t that significant. For most valve manufacturers, 316 is considered the standard stainless steel material and is used more frequently than 304; in most quotes, 316 is used in place of 304. .