Wire, bar, rod made of HN77TJUR
HN77TJUR wire, rod supplier
«Auremo» supplier offers to buy HN77TJUR wire, rod by wholesale. There is a wide range of half-finished goods in stock. They are compliant with GOST and International Standards of quality. Wire, rod, bar HN77TJUR are always in stock. You can buy them for an affordable HN77TJUR wire, rod price from a supplier. Buy HN77TJUR wire, rod in a moment! HN77TJUR wire, rod price is privileged for wholesale customers.
Steel stainless wire of this grade has a special place among analogous types of metal-roll. It is in much-request in manufacturing springs, heating electrical elements because it possesses elasticity, corrosive resistance, long-term service. Chemical interaction of alloy components with oxygen forms on a surface an extremely thin film that can resist corrosion. Bar section of an actual steel grade is intended for manufacturing details that are exploited at a high temperature (not higher than 850ºС) in aggressive chemical environment. Due to increased content of nickel and chrome, such wire has a high corrosive resistance. It also provides an increased reliability of equipment.
Percentage composition of alloy:
Steel of this grade is smelted in open electrical furnaces. It gives a minimal content of residual elements. This alloy is released in the form of wire (it can have various thickness). Due to high nickel content (up to 77%), a high plasticity of alloy allows making wire with a minimal diameter. Thermohardening performs at a temperature of about 1120ºС with further cooling in water or in air. Age-hardening performs at a temperature of 700−750°C during 5−16 hours (depending on type of mill-products). This is hardly weldable alloy.
Wire is intended for manufacturing springs that have exploitation temperature in a range of -70º +550ºС. It is used in manufacturing cylindrical spiral springs of tension and compression. Coil springs of tension and compression fall into 3 groups by a type of loads. A process of springs manufacture undergoes such operating steps as milling, polishing etc.; on completing it undergoes a heat treatment. Springs undergo a sand jet treatment that can scale off for increasing a corrosive resistance.
A quality of wire at a t° 20°С:
— short resistance to rupture = 950 MPa;
— flow limit = 620 MPa;
— ultimate elongation at break = up to 20%;
— ultimate contraction = not higher than 15%;
— hardness after thermohardening according to Brinnel = 255 — 321 MPa;
A wire surface does not oxidize at durable exploitation or at a high temperature. Annealed wire is malleable. This makes it popular in a manufacture of electrical and industrial appliances. It possesses a resistance in oxidising atmosphere if there are present ammonia and nitrogen. Its main demerit is that a wire does not have stability in atmosphere of sulphur and sulphur compounds. It is not cheap because its main component — nickel is expensive.
Mechanical properties at t° of 100°С:
— lineal expansion coefficient α = 12,67×10-6/°C;
— density — 8,18 g/cm3;
— heating capacity 13,9 V/(m*deg);
— electrical resistivity- 1,247 Ohm-mm2/m.
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