Nickel 201 wire, rod, bar
Nickel is a very hard, touch, malleable metal. It is easy to work down and that is why jewelers were first who estimated its properties. It covers with a protective oxidation film, which prevents its corrosion in air at a normal temperature. It can withstand gaseous, liquid, aggressive environment and heating up to a temperature of 850 °C. There are possible to produce various types of a tube (rolling, lathe work, bending) due to a high plasticity. It can be rolled, lathe turned, drawn, stamped or welded. The only demerit of alloy is a sulfur additive, which can create a sulfide film on a surface of equipment. By doing so, it makes alloy more brittle at high temperatures.
Nickel 201 alloy consists of a pure nickel and a small amount of residual elements. It is an indispensable metal in a special vacuum-tube mechanical engineering. A stock material is obtained with a help of nickel offscouring meltback.
|Ni||Si||Fe||C||Mn||Cu||Mg||Zn||P||S||P||Pb, Sn, Sb, Bi, As|
A rod has the following parameters:
— drawn off-measurement to 1,5 — 4 m;
— rolled to 1−3 m., with a diameter not more than 60 mm;
— rolled to 0.7 — 1.4 m., with a diameter not more than 60 mm;
— specific cut length and length that is aliquot to specific cut length within off-measurement; a pass-off standards constitute not more than 15 mm in a direction of length increasing.
There are used grades Ni1, Ni3, semi-fabricates Nickel 200, Nickel 201 and silicious Ni at manufacturing. Nickel wire and bar (rod) must have clean and smooth surface and must not contain dirt or cracks. Defects that have appeared on a surface, should not exceed pass-off standards. A rod can only be in a straight form. A degree of a normal crook has to be measured with a help of length multiplying of bar by a whole degree of a normal crook in every concrete place of unit. Depending on a type of semi-fabricate, its mechanical features must withstand a pressure requirement of 370−440 MPa. At the breaking points, a bar should not have an extraneous impurity or voids. Ends of cutoff should be square.
Nickel wire, rod are used for producing details that operate at high temperatures, for mechanical loads in a special vacuum-tube mechanical engineering, chemical and petrochemical industry, instrument engineering, electro-chemistry, manufacture of cathodes and anodes. Metallurgists do the alloying of nickel alloys with a help of rod Nickel 201.
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