What are the materials used to manufacture mechanical seal springs?
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The springs of mechanical seals must have sufficient strength, be resistant to corrosion by the medium, and maintain their stiffness with little to no degradation over prolonged use at operating temperatures. Common spring materials include phosphor bronze, beryllium copper, 65Mn, 60Si2Mn, 50CrV, 3Cr13, 4Cr13, 1Cr18Ni9Ti, Cr18Ni12Mo2Ti, etc. Springs made of phosphor bronze and beryllium copper are used in oils and seawater; carbon steel springs are suitable for use in environments at normal temperatures without corrosive agents. 50CrV is commonly used in high-temperature oil environments, while chromium steel is used in mildly corrosive environments. Stainless steels such as 1Cr18Ni9Ti and Cr18Ni12Mo2Ti can be used in corrosive media such as dilute nitric acid, acetic acid, and urea; for some strong acids, coating measures are necessary. Table 22 provides relevant data on the main spring materials for reference.
Materials used to manufacture mechanical seal springs include phosphor bronze, beryllium copper, 65Mn, 60Si2Mn, 50CrV, 3Cr13, 4Cr13, 1Cr18Ni9Ti, Cr18Ni12Mo2Ti, etc. Phosphor bronze and beryllium copper can be used in oils and seawater; carbon steel is suitable for media without corrosive properties; 50CrV is appropriate for high-temperature oil environments; chromium steel can be used in mildly corrosive media; stainless steels 1Cr18Ni9Ti and Cr18Ni12Mo2Ti are suitable for corrosive media such as dilute nitric acid, acetic acid, and urea. A coated layer may be necessary in a strong acid environment. .