HN77TJUR (Nimonic 80A) tube
|Grade||analogue||W. Nr.||Aisi Uns||En||Order|
|XN77TYUR||EI437B||2.4952||N07080||NiCr20TiAl||Buy from stock, view availability|
|HN77TYURB||EI437A||Buy from stock, view availability|
|XN77TYURU||EI437BU||Buy from stock, view availability|
Nowadays, it is hard to imagine a modern industry without using stainless alloys on a nickel basis. This nickel-chromium steel possesses resistance to corrosion, long operational life. It is much-requested in industries that manufacture details (which are exploited at a high temperature of 750−850ºС in aggressive gas environment). Due to a high content of nickel and chrome, details that are made of this alloy have a high corrosive resistance by providing an increased reliability of equipment.
Alloy composition complies with GOST 5632−72. This alloy is smelted in open electric furnaces. It provides a minimal content of unnecessary residual elements.
Percentage composition of alloy
Thermohardening performs at a temperature of 1080 — 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 a type of mill-products). This alloy is hardly weldable. It is released in the forms of hot rolling or cold-rolled bar, hot-rolled or cold-rolled pipe.
Strength properties 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;
Mechanical properties at t° of 100°С:
— lineal expansion coefficient α = 12,67x10-6/°C;
— density — 8,18 g/cm3;
— heating capacity 13,9 V/(m-deg);
— electrical resistivity- 1,247 Ohm-mm2/m.
It is utilized in circles, disks, turbine blades, gas-fired boiler tubes and other equipment that exploits at a temperature of 750 °C in complex environment. There can be manufactured details with increased strength for critical structures (wheels, wrist pins, weld beds, friction discs, external screws, circles) in aircraft engineering, in motor-vehicle construction.
Assembly modules that are made of HN77TJUR are intended to long operational life in energetics, petroleum refining and gas processing industries at a temperature of not higher than 850ºС. This alloy is used in manufacture of pipelines of different cross-section, in manufacture of heat interchanger, reservoir etc.
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