Pipe, rod, wire HN77TJU
Heat-resisting nickel alloy HN77TJU is intended for manufacturing turbine blades, disks, circles and other details that are exploited at a temperature not higher than 750 °C. The main requirements to a material are conditioned by the latest developments of engine constructions, continuous increasing of plasticity, resistance to low-cycle and thermal fatigue, heat resistance, resistance to effect of gas environment. Material must possess a high resistance to breakage at thermal and low-cycle fatigues in modern engines for turbine blades. Nowadays, they are the main types of breakage. A risk of breakage can increase by surface reactions. They appear because of grain boundary softening and gas corrosion.
Bar properties according to GOST 23 705−79. Alloy hardness HB 10 -1 = 255 — 321 MPa.
Percentage composition according to GOST 5632−72
|≤0,001||≤0.6||≤0,07||≤1||≤ 0.4||70.083 — 77.4||19 — 22||0.6 — 1||2.4 — 2.8||≤0,007||≤0,003||≤ 0.4||≤0.015|
Mechanical properties at a temperature 20°C
|GOST 23705−79||Heat treatment||
|Bar||Thermohardening and age-hardening||610||5||12|
|Short resistance to rupture [MPa]||sv|
|Flow limit (proportional limit load) for permanent change of form [MPa]||sT|
|Percent elongation at fracture [ % ]||d5|
|Contraction ratio [ % ]||y|
|Impact hardness [ kJ/m2]||KCU|
|Brinell hardness [MPa]||HB|
|limitedly weldable||welding is possible after welding details heating to 100−120°С with further heat treating|
|hardly weldable||in order to obtain a qualitative welded joints, it is necessary to perform the following operations: while welding to heat it up to 200−300°C, to do a heat treating (annealing) after welding|
|welding is done without further heat treating or previous heating|
«Auremo» HN77TJU pipe, rod supplier proposes to buy rod, wire, pipe for the most favorable HN77TJU pipe, rod price. A wide choice of qualitative products which comply with GOST and International Standards of quality is presented in stock. An availability of products and efficiency of delivery are conditioned by a fact that we have our offices in Moscow, St. Petersburg and cities of Central Europe. You can easily buy products. HN77TJU pipe, rod price depends on order quantity and additional conditions of supply. A quality is compliant with GOST (all-Union State Standards) and International Standards. If you buy HN77TJU pipe, rod by wholesale, you will be given special discounts.
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