Tape ХН77ТЮР - ЭИ437Б
International Equivalent
| Mark | Analogue | W. Nr. | Aisi Uns | En | Order |
|---|---|---|---|---|---|
| XN77TYUR | EI437B | 2.4952 | N07080 | NiCr20TiAl | Delivery from the stock, in stock |
| XN77TYURU | EI437BU | Delivery from the stock, in stock |
General characteristics
The composition of heat-resistant steel tape of ХН77ТЮР grade (the obsolete name ЭИ437), is regulated by GOST 5632- — - — - 72. Foreign analogues of this alloy are steel Inconel, Incoloy, Hastalloy. Such tapes have the increased quality. The titanium included in the composition hardens the alloy KhN77TYR and optimizes the technical characteristics, giving the strip a homogeneous strong structure. Nickel forms a surface oxide film that protects the strip from corrosion and is easily repaired with minor damage.
Chemical composition:
| Ni | Cr | Ti | Al | Fe | Si | Mn | С | Ce | P | B | Pb | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 70- 77,4 | 19−22 | 2,4−2,8 | 06−1,0 | up to 1 | up to 0.6 | up to 0.4 | 0,07 | 0,02 | 0,015 | 0,01 | 0,01 | 0,007 |
Heat treatment
Hardening is carried out at 1090−1120 ° C, cooled in air or water. Aging takes place at 700−750°C for 12−16 hours. Weldability is limited. To obtain durable welds it is necessary to preheat up to 200 — 300 °C with the final annealing after welding.
Advantages of
Tape is resistant to soil and atmospheric corrosion, has a minimal tendency to brittle fracture at low temperatures. Designed for long-term operation at temperatures up to 750 °C, it is highly resistant to nitric, sulfuric acid, aggressive environments of industrial gases. Resistant to hot condensate, meets the most stringent hygiene requirements.
| t° | E 10- 5 | a 10 6 | Heat capacity | Density |
|---|---|---|---|---|
| Grad | MPa | 1/Grad | W/(m-grad) | g/cm3 |
| 20 | 1.96 | 12,6 | 8,2 | |
| 200 | 12.9 | 15.6 | 8,14 | |
| 400 | 13,8 | 18.8 | 8,07 | |
| 600 | 1.57 | 14.6 | 23,5 | 8 |
| 800 | 1,28 | 15.5 | 28.2 | 7,97 |
Disadvantages
Such expensive metals such as chromium, nickel, molybdenum, titanium in the composition of steel CrN75MBTU, affect its cost. But the high strength, reliability and durability of the tape, the possibility of recycling the material — reduces the high cost in the long term investment.
Applications
Such heat-resistant nickel tape technological and corrosion-resistant (in sea water, hot condensate vapors) in conditions of extreme temperatures is in demand very widely. This includes mechanical engineering, power generation, gas production, chemical and oil refining industries, defense industry. Tape is used to produce parts of combustion chambers of combustion engines and turbines — both moving (rotating) and stationary (static). Compliance with the requirements of SNIP make such a tape in demand in medicine and food industry.
Buy at the best price
Evek GmbH offers a wide range of stainless steel rolled stock of standard and non-standard parameters. You can easily buy CrN77TYR tape wire through our web-site or by contacting the nearest Evek office. Our friendly and qualified specialists are always ready to help you with purchasing questions. At your service standards of steel, steel grades, reference materials, price lists and a list of services provided by our company. A flexible system of discounts is available for wholesale orders.