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Different Kinds of Stainless Steel Valves
Sep 09, 2022
Teresa
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Stainless steel valves
Stainless steel valves are used in more and more fields. Among them, the demand for stainless steel ball valves and stainless steel gate valves in industrial sewage, building structure industries, and environmental protection industrial facilities will also increase year by year. In the water industry, people are paying more and more attention to the problem of water pollution during storage and transportation. A large number of practices have proved that stainless steel valves are a good choice in the water industry such as water preparation, storage and transportation, purification, regeneration, and desalination of seawater. Stainless steel valves can achieve many of the desirable properties required by building design materials. They are unique among metals, and their development continues.
What do stainless steel valves consist of?
Stainless steel valve is made of an alloy composed of iron, chromium, carbon and many different elements. Iron is the main component element, and chromium is the first main alloying element. Generally speaking, the chromium content must be at least 11% to be called a stainless steel valve, because if the chromium content is insufficient, the surface of the stainless steel valve will not be able to form the dense chromium oxide protective film; the function of rust prevention will be lost. If the content of chromium is sufficient, stainless steel will not rust in the normal temperature atmosphere. The most seen stainless steel valve bodies are cast and forged valve bodies. The common materials are CF8 (F304), CF8M (F316), CF3 (F304L) and CF3M (F316L).
Stainless steel valves are usually divided into four categories according to the matrix structure:
①Ferritic stainless steel valves: with 12% to 30% chromium, their corrosion resistance, toughness and weldability increase with the increase of chromium content, and their resistance to chloride stress corrosion is better than other types of stainless steel valves.
②Austenitic stainless steel valves: they contain more than 18% chromium, and also contain about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. They have good comprehensive performance and are resistant to corrosion by various media.
③Austenitic-ferritic duplex stainless steel valves: they have the advantages of both austenitic and ferritic stainless steel ball valves, and also have superplasticity.
④ Martensitic stainless steel valves: they have high strength, but poor plasticity and weldability.
Stainless steel valves are used in more and more fields. Among them, the demand for stainless steel ball valves and stainless steel gate valves in industrial sewage, building structure industries, and environmental protection industrial facilities will also increase year by year. In the water industry, people are paying more and more attention to the problem of water pollution during storage and transportation. A large number of practices have proved that stainless steel valves are a good choice in the water industry such as water preparation, storage and transportation, purification, regeneration, and desalination of seawater. Stainless steel valves can achieve many of the desirable properties required by building design materials. They are unique among metals, and their development continues.
What do stainless steel valves consist of?
Stainless steel valve is made of an alloy composed of iron, chromium, carbon and many different elements. Iron is the main component element, and chromium is the first main alloying element. Generally speaking, the chromium content must be at least 11% to be called a stainless steel valve, because if the chromium content is insufficient, the surface of the stainless steel valve will not be able to form the dense chromium oxide protective film; the function of rust prevention will be lost. If the content of chromium is sufficient, stainless steel will not rust in the normal temperature atmosphere. The most seen stainless steel valve bodies are cast and forged valve bodies. The common materials are CF8 (F304), CF8M (F316), CF3 (F304L) and CF3M (F316L).
Stainless steel valves are usually divided into four categories according to the matrix structure:
①Ferritic stainless steel valves: with 12% to 30% chromium, their corrosion resistance, toughness and weldability increase with the increase of chromium content, and their resistance to chloride stress corrosion is better than other types of stainless steel valves.
②Austenitic stainless steel valves: they contain more than 18% chromium, and also contain about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. They have good comprehensive performance and are resistant to corrosion by various media.
③Austenitic-ferritic duplex stainless steel valves: they have the advantages of both austenitic and ferritic stainless steel ball valves, and also have superplasticity.
④ Martensitic stainless steel valves: they have high strength, but poor plasticity and weldability.
