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Wire HN77TYUR - Ei437bu

Wire HN77TYUR - Ei437bu

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Stainless steel wire brand HN77TYUR occupies a special place among the similar types of metal. It is widely demanded in the manufacture of springs, electrical heating elements, since it is resilient, anti-corrosion properties and long service life. Chemical interaction of components of alloy HN77TYUR with oxygen it forms on its surface a thin film that protects it from corrosion.

Wire brand HN77TYUR is intended to produce parts which are operated at high temperature (not higher 850ºС) in aggressive chemical environments. Due to the high content of Nickel, chromium, this wire has high corrosion resistance, providing increased reliability of equipment.

The chemical composition of the alloy, in percent.
Ni Ti Cr Al Si Fe Mn Ce With P Pb B S
70 — 77,4 2.4 to 2.8 19−22 06−1,0 to 0.6 to 1 to 0.4 0,02 0,07 0,015 0,01 0,01 0,007

Production

Steel brand HN77TYUR is smelted in open furnaces, which provides the minimum content of impurities. Percentage composition is regulated by GOST 5632−72. This alloy is supplied in the form of wire of different thickness. High ductility of the alloy, due to the significant Nickel content of up to 77% allows to produce wire of minimum diameter. Quenched wire at a temperature of about 1100 °C with subsequent cooling in water or air. Aging occurs at a temperature of 700 — 750 °C for 5−16 hours depending on the type of hire. This alloy is hard to weld.

Use

The wire spring heat-resistant alloy HN77TYUR Nickel-based, designed for the production of springs with a temperature in the range of-70º +550ºС. Alloy produce helical springs, tension and compression. Helical springs in tension and compression are divided by type of load in three groups of precision. The manufacturing process of the springs passes through such stages of machining like milling, grinding, etc., and after the heat treatment. To improve the corrosion resistance, the springs are abrasive jet machining, removing them from the scale.

Quality wire HN77TYUR at t° 20°C:

— The ultimate short-term strength = 950 MPa;

— yield strength of 620 MPa.;

max. elongation at break — 20%;

— max. contraction is no higher than 15%;

— hardness after hardening Brinell — 255 — 321 MPa.

The surface of the wire is not susceptible to oxidation during long-term operation in high temperature environment. Black annealed wire plastic, making it popular in the manufacture of domestic and industrial appliances. It is resistant to oxidizing atmosphere, to an atmosphere of ammonia and nitrogen. However, its main drawback is that it does not have stability in the atmosphere of sulfur compounds and sulfur. It has a high cost, because of the high cost of the main components — Nickel

Mechanical properties at t°100°C:

the linear expansion coefficient of 12.67x10-6/°C;

— density of 8.18 g/cm3;

— heat capacity of 13.9 W/(m·deg);

the resistivity of 1,247, Mhmm2/m.

Buy at best price

LLC «AVEK global» implements of precision alloys at a bargain price. It is formed under the influence of world prices for metal without the inclusion of additional costs. Wire HN77TYUR belongs to the popular group of steel products due to its real value and variety of output options. The face of our company determines the high level of service and excellent quality products. On the website LLC «AVEK global» reflects the most current information. Our managers are always happy to help answer questions. Implementation of orders takes minimal time. Deliveries go directly from the warehouse. This gives consumers significant savings on inventory and facilities. In the absence of the basic version, the required version of the products, we can produce them according to individual order.