HN70YU brand pipe (formerly designated as EI652) made of a superalloy based on nickel, which is contained in the composition of 65.073 — 71.2%. This superalloy refers to the «doped». In addition to nickel chrome composition HN70YU includes 26 — 29%. Therefore HN70YU alloy is also referred to as nickel-chromium. Used as additives: aluminum 2,8−3.5% Iron — up to 1%, barium — not more than 0.10% manganese — up to 0.3% cerium — less than 0.03% silicon — 0 to 8% phosphorus — not more than 0.015%, copper — 0.07% sulfur, — up to 0.012%.
The percentage of (GOST 5632−72)
|HN70YU||≤0.1||≤1||≤0.3||≤0.015||≤0.012||65,1−71,2||26−29||≤0.7||2.8 — 3.5||≤0.8||≤0.03||≤0.1|
Steel is melted in an induction furnace or open used electroslag remelting method — a method for producing metal by melting an electrically conductive slag bath in an electric current. This method greatly improves the quality of the alloy. The pipe is made according to GOST 12 766.4−77 and 5632−72. Hot forging is carried out at t ° 1150 ° C at the beginning and 900 ° C at the end of the process. After pull the shoes recommended quenching in air or water at 1100−1200 ° C. Weldability — limited. Need heated to about 200 ° C and a final heat treatment.
|t °||E 10 — 5||a June 10||Heat capacity||Density|
|hail||MPa||1 / Grad||W / (m · deg)||g / cm 3|
Manufacturers fragments pipeline systems, whose work is held under moderate stress. This alloy is heat resistant and heat-resistant, but is unstable in the sulfur-containing environments. HN70YU pipe can be used for a long time at temperatures up to 800 ° C, although able to withstand a short-term rise t ° to 1200 ° C, but even more the process of heating causes the active formation of scale. Also, the alloy used for the manufacture of heating elements, welding wire for welding parts and welding of metal structures in mechanical engineering. This steel can be used for production of parts afterburners — additional combustion chamber turbo-jet engines intended for the temporary increase in traction, and the combustion chambers, which operate with little tension in the temperature range 1100−1200 ° C. When heated, chromium and aluminum in the alloy composition active form oxide film, which increases the resistance of the material to a corrosive environment. In addition to pipeline systems HN70YU pipe can be used for drainage, construction of industrial building structures.
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In stock «Electrovek-steel» company offers a wide range of brand products HN70YU standard and custom settings. Prices are due to the technological features of production without including additional costs. Terms of realization of orders are minimal. Wholesale customers receive discounts.