Metal gaskets are usually used with higher temperature and higher pressure. The performance and selection of the metal gasket material of Bird Sealing and Finishing provide you with a reference.
1. Carbon Steel
It is recommended that the maximum working temperature does not exceed 538 ° C. Especially when the medium is oxidizing, the high-quality thin carbon steel plate is not suitable for use in equipment such as inorganic acids and acidic solutions under hot water conditions. It can usually be used for high concentration acids and most alkali Sexual solution. Brinell hardness is about 120.
2.304 stainless steel
It is recommended that the maximum working temperature does not exceed 760 ° C, and between -196 and 538 ° C, stress corrosion and grain boundary corrosion are likely to occur. Brinell hardness 160.
3.304L stainless steel
It is recommended that the maximum operating temperature does not exceed 760 ° C, the carbon content does not exceed 0.03%, and the corrosion resistance is similar to 304 stainless steel. Lower carbon content can have higher resistance to grain boundary corrosion, which is better than 304 stainless steel. Brinell hardness is about 140.
4.316 stainless steel
It is recommended that the maximum working temperature does not exceed 760 ° C. Add about 2% molybdenum to 304 stainless steel. The strength and corrosion resistance at high temperature are improved, and it has higher creep resistance than other ordinary stainless steels. Brinell hardness is about 160.
5.316L stainless steel
It is recommended that the maximum continuous working temperature should not exceed 760 ~ 815 ℃, which has better stress resistance and good grain boundary corrosion performance than 316 stainless steel. Brinell hardness is about 140.
6.20 alloy
It is recommended that the maximum working temperature should not exceed 760 ~ 815 ° C, which is composed of iron, nickel, chromium and a small amount of molybdenum and copper alloys, can withstand the corrosion of sulfuric acid, and is suitable for manufacturing equipment with strong acid. Brinell hardness is about 160.
7. Aluminum
It is recommended that the maximum continuous working temperature does not exceed 426 ° C, and the aluminum content is more than 99%. It has excellent corrosion resistance and machinability, and is suitable for the manufacture of double clip gaskets. Brinell hardness is about 35.
8. Red copper
It is recommended that the maximum continuous working temperature does not exceed 260 ℃, the composition is close to pure copper, and contains a small amount of silver to make it withstand higher temperatures, and the Brinell hardness is about 80.
9. Brass
It is recommended that the maximum continuous working temperature should not exceed 260 ° C. The copper-zinc alloy can maintain good corrosion resistance under most working conditions, but it cannot withstand acetic acid, ammonia salts and acetylene. Brinell hardness is about 58.
10. Hastelloy B-2
It is recommended that the maximum working temperature does not exceed 1093 ° C and is composed of molybdenum, nickel and a small amount of iron. It has excellent heat resistance, and can also corrode high concentration hydrochloric acid, sulfuric acid and most reducing salt solutions of animals. Strength of. Brinell hardness is about 230.
11. Hastelloy C-276
It is recommended that the maximum working temperature should not exceed 1093 ° C. The alloy composed of nickel, molybdenum, chromium, tungsten, and iron has excellent corrosion resistance. It has good tolerance to highly corrosive chemicals such as nitric acid and sulfuric acid. Brinell hardness is about 210.
12. Inconel 600
It is recommended that the maximum working temperature does not exceed 1093 ° C. An alloy composed of nickel and a small amount of chromium and iron has high strength at high temperatures. It is usually used to solve stress corrosion problems and has good processability at low temperatures. Brinell hardness is about 150.
13. Monel 400
It is recommended that the maximum continuous working temperature does not exceed 815 ° C. Copper-nickel alloys, in addition to strong oxidizing acids, have excellent corrosion resistance to most chemicals. . Brinell hardness is about 120.
14. Titanium
It is recommended that the maximum operating temperature does not exceed 1093 ° C and has excellent corrosion resistance under high temperature conditions. Resistant to chloride ion, nitric acid and other corrosion, suitable for oxidizing conditions. Brinell hardness is about 216.
Simple metal gaskets have certain use limitations. It is recommended to choose metal composite gaskets in actual use, and provide reasonable experience and testing by Bird Sealing Engineers, which can provide better performance and for complex processes. Wider application.
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