The following are some common special material valves and their material characteristics:
Titanium and Titanium Alloys
· Material series: Such as ZTA1, ZTA2, ZTA3, ZTA9, ZTA10, ZTC4, TA1, TA2, TA3, TA9, TA10, TC4, etc.
· Performance characteristics: It has high chemical activity but shows extremely excellent corrosion resistance to many corrosive media. This is because titanium has a good affinity with oxygen and is extremely easy to react with oxygen to form a strong and dense passive oxide film on its surface. Moreover, this oxide film is very stable in harsh corrosive working media and is difficult to dissolve. Even if it is damaged, as long as there is sufficient oxygen, it can repair itself.
· Application fields: Commonly used in fields with extremely high requirements for corrosion resistance such as aerospace, marine engineering, chemical industry, and healthcare.
Nickel and Nickel Alloys
· Material series: Including N6, N4, N2, CZ100, Nickel200, Nickel201, N02200, N02201, etc.
· Performance characteristics: It has good high-temperature corrosion resistance and oxidation resistance and can maintain relatively high strength and toughness at high temperatures.
· Application fields: Widely used in fields such as chemical industry, petrochemical industry, marine engineering, and electronics, especially suitable for handling media with high temperature and strong corrosiveness.
Monel Alloy
· Material series: Such as Monel400, MonelK500, M35-1, M35-2, M35C, M30H, N04400, N05500, etc.
· Performance characteristics: It has excellent corrosion resistance to reducing acid media, especially outstanding corrosion resistance in high-temperature hydrogen fluoride gas and hydrofluoric acid solution. It can resist the corrosion of concentrated hydrofluoric acid solution and is more corrosion-resistant in seawater than copper-based alloys.
· Application fields: Mainly applied in working conditions of high-temperature hydrogen fluoride gas and hydrofluoric acid solution, as well as in marine engineering and other fields.
Hastelloy Alloy
· Material series: Commonly seen are Hastelloy C276, Hastelloy B, Hastelloy B-2, Hastelloy C-22, Hastelloy C-4, Hastelloy G, Hastelloy G30, etc.
· Performance characteristics: Hastelloy C-276 alloy is a tungsten-containing nickel-chromium-molybdenum alloy with extremely low silicon and carbon content. It is considered an all-purpose corrosion-resistant alloy. In both oxidation and reduction states, it has excellent corrosion resistance to most corrosive media, outstanding resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking. It mainly resists wet chlorine, various oxidizing chlorides, chloride salt solutions, sulfuric acid and oxidizing salts, and has good corrosion resistance in low-temperature and medium-temperature hydrochloric acid.
· Application fields: Widely used in industrial fields with harsh corrosive environments such as chemical industry, petrochemical industry, flue gas desulfurization, pulp and paper making, and environmental protection.
Inconel Alloy
· Material series: Such as Inconel600, Inconel625, Incoloy800, Incoloy800H, Incoloy825, etc.
· Performance characteristics: It has excellent high-temperature oxidation resistance and does not embrittle even after repeated heating and cooling. It can be strengthened by heat treatment and has good high-temperature strength.
· Application fields: Widely used in departments such as energy development, chemical industry, electronics, navigation, aviation, and aerospace.
Zirconium Material
· Material series: Zr702, Zr705, Zirconium702, Zirconium705, 702C, 705C, R60702, R60705, etc.
· Performance characteristics: It has excellent corrosion resistance, especially outstanding corrosion resistance in high-temperature and strong corrosive media. At the same time, it has a relatively low thermal neutron absorption cross-section, suitable for fields such as the nuclear industry that have requirements for material corrosion resistance and nuclear properties.
· Application fields: Commonly used in fields such as chemical industry and nuclear industry, such as manufacturing corrosion-resistant components in chemical equipment and fuel cladding in nuclear reactors.
Duplex Stainless Steel
· Material series: Such as 2205, 2507, 1A, 2A, 3A, 4A, 5A, 6A, 1B, 1C, CD4MCu, CD4MCuN, CD3MCuN, etc.
· Performance characteristics: Its relatively high chromium and molybdenum content gives it strong overall corrosion resistance to organic acids such as formic acid and acetic acid. It also has strong corrosion resistance to inorganic acids, especially inorganic acids containing chlorides. Compared to 904L, it has stronger corrosion resistance to diluted sulfuric acid mixed with chloride ions.
· Application fields: Widely used in fields such as petrochemical industry, marine engineering, papermaking, and pharmaceuticals for manufacturing corrosion-resistant equipment such as pipelines, valves, and containers.
Super Austenitic Stainless Steel
· Material series: Such as 904L, N08904, ALLOY20, N08020, CN7M, AL-6XN, N08367, CN3MN, 254SMO, F44, CK3MCuN, S31254, etc.
· Performance characteristics: It has good corrosion resistance, high strength, and good processability, and shows good stability in some harsh corrosive environments. It can resist the erosion of various corrosive media.
· Application fields: Commonly used in fields with high requirements for material corrosion resistance and hygiene such as chemical industry, marine engineering, pharmaceuticals, and food processing.
Nickel Aluminum Bronze Alloy
· Material: Such as C95800, etc.
· Performance characteristics: It has relatively high strength, good wear resistance and corrosion resistance, and has good stability in corrosive media such as seawater.
· Application fields: Mainly applied in fields such as marine engineering and shipbuilding, such as manufacturing ship propellers, valves, pumps and other components.
High-Temperature Ceramics
· Material series: Such as alumina ceramics, silicon nitride ceramics, etc.
· Performance characteristics: It has extremely high high-temperature resistance and corrosion resistance, high hardness and good wear resistance, but relatively large brittleness.
· Application fields: Suitable for ultra-high temperature and corrosive medium environments, such as valve components in high-temperature and strong corrosive working conditions in fields such as aerospace, energy, and chemical industry.
Tungsten Alloy and Tantalum Alloy
· Performance characteristics: Belonging to high-temperature special alloys, they have excellent high-temperature strength and corrosion resistance, but the cost is relatively high.
· Application fields: Suitable for extreme high-temperature and complex working conditions, such as high-temperature components of aerospace engines and key components of nuclear reactors.