NP1A grade nickel-based alloys are used in the manufacture of welded chemical equipment required in the production of liquid chlorine, chlorine, caustic soda, etc. of the alloy’s density is 8.9 g / cm³.; and the coefficient of thermal conductivity λ = 0,92 · 100 W / (m · K). Recommended operating parameters: pressure of not more than 1.6 N / mm²; temperature of from -70 to 500 ° C. On NP1A alloy has the following specifications: 48−0814−11 / 0−83; 14−3-1591−88; 48−0815−84−92; 48−0815−80−92.
Mechanical properties at 20 ° C
|TU||products||Rm N / mm²||ReH N / mm²||δ,%||ψ,%|
|> By TU 48−0815−80−92||The cold rolled sheets (annealed)||430||_||25|
|According to TU 48−0815−84−92||Sheets and plates, hot-rolled||372||_||25||_|
|According to TU 14−3-1591−88||Pipes:|
|According to TU 48−0814−11 / 0−83||pipes Cold||392||-||25||-|
Note: The mechanical properties of plates optional. For nickel NP2 recommend heating at a temperature of 620−700 ° C. exposure 3 min / mm thickness but not less than 30 min, cooling in air.
The mechanical properties at room and elevated temperature
|tisp||Rm N / mm²||σ0,2, N / mm²||δ,%||> tisp||Rm N / mm²||σ0,2, N / mm²||δ,%|
|20 ° C||430||-||-||300 ° C||392||-||-|
|100 ° C||392||-||-||400 ° C||314||-||-|
|200 ° C||392||-||-||500 ° C||265||-||-|
|100 ° C||416||29,835,400 ° C 30 020 043|
|300 ° C||366||251||44||500 ° C||263||237||33|
|20 ° C||323/382||-||-||400 ° C||288||-||-|
|100 ° C||357||-||-||500 ° C||225||-||-|
|200 ° C||350||-||-||600 ° C||166||-||-|
|300 ° C||337/382||-||-|
NP1A alloy corrosion-resistant
- in the cold and hot alkaline and neutral solutions of salts (nitrates, carbonates, chlorides, sulfates, acetates), which have no oxidizing properties;
- in dilute nonoxidizing inorganic and organic acids at low or moderate temperatures;
- in contact with the hydrogen, fluorine, chlorine dry, chloride, or hydrogen fluoride to 540 ° C temperature; in contact with the sulfur dioxide dry t ° to 320 ° C. The potassium and sodium hydroxyls t ° to 350 ° C.
Welding of nickel vessels and vehicles takes place by means of manual TIG welding consumable electrode, and manual arc welding. During welding you need to protect the weld and heat affected zone of the air environment. In TIG welding as filler material used welding wire NMu ATK-0,15−2.5−0,15 (TU 48−21−284−73). Welding modes: 40−120 A for the thickness of 1−4 mm, 180−250 A for 6−12 mm thickness. Welds made by manual TIG welding consumable electrode, have the following mechanical properties: σ0,2 = — 225 N / mm2, Rm = 420 N / mm2, KCU = 130 J / cm².
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