NS142 alloy is a NI-FE-MO-CU corrosion-resistant alloy stabilized with Ti.
The alloy has effective resistance to uniform corrosion and localized corrosion, and has good performance, so it is widely used in chemistry, energy, and hydrometallurgy. Application.
In addition, the alloy has good toughness and is also good in the atmosphere, but it should be noted that very shallow pitting corrosion will occur in the humid atmosphere.
The alloy is also resistant to fresh water corrosion. It is well used in flowing seawater, but Spotting can occur in still seawater or under polluted conditions, so everyone should pay attention to this when producing products.
NS142 alloy has good corrosion resistance in various media, such as sulfuric acid, phosphoric acid, HCl, HNO3, Na2SO3, organic acids and compounds.
Alkali metals such as sodium hydroxide, potassium hydroxide and HCl solutions. Of particular note is the poor corrosion resistance in hydrofluoric acid.
NS142 alloy has a wide range of corrosion resistance, and is generally used in chemical processing industry, hot sea water and hydrometallurgy, mainly used for heat exchangers, pipes, valves, water pumps in hot sulfuric acid, chloride-containing solutions, Na2SO3 and other environments It is also widely used in the fields of wood pulp extractors and deep source gas wells in the paper industry.
NS142 alloy properties:
1. Stress corrosion cracking resistance
2. Resistance to pitting and crevice corrosion
3. Oxidative and non-oxidative thermal acid resistance
4. Good mechanical properties at room temperature and high temperature up to 550ºC
5. Certification of pressure vessels with manufacturing temperature up to 450ºC.
NS142 chemical composition:
carbon C: ≤ 0.05,
chromium Cr: 19.5~23.5,
nickel Ni: 38~46,
aluminum AL: -,
titanium Ti: -,
iron Fe: excess,
manganese Mn: ≤ 1.00,
silicon Si: ≤ 0.5 ,
phosphorus P: ≤ 0.040,
sulfur: S: ≤ 0.03,
copper Cu: 1.5~3.0,
tungsten W:-,
boron B:-,
molybdenum Mo: 2.5~3.0,
nitrogen N: 0.6~1.2.
The corresponding grades of NS142 are as follows:
National Standard: NS1402, NS142, 0Cr21Ni42Mo3Cu2Ti,
American Standard: ASTMA: NS142, SAE: No8065, US UNS: No8825,
Japanese JIS: ncf825,
German DIN: 2.4858,
European EN: NiCr21Mo,
French NF: /,
British BS:nife30cr21no3,
Rui SS14:/. NTR: NA2, NA16/41
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