718 Inconel Alloy Tube Sheet Round Bar Nickel Alloy Wire UNS NO7718 W.N.2.4668

Inconel 718 is also known as UNS NO7718,UNS N07718, W.N.2.4668, NiCr19Fe19Nb5,GH4169 (China)

Inconel 718 is a Ni-Cr-Fe base precipitation-hardening deformed superalloy with a long-term operating temperature range of -253℃~650℃ and a short-term operating temperature of 800℃. The alloy has high strength below 650℃ and has good fatigue resistance, radiation resistance, oxidation resistance and corrosion resistance, as well as good processability, weldability and long-term structural stability. Suitable for the manufacture of turbine discs, rings, blades, shafts, fasteners and elastic components, plate structural parts, casing and so on in aviation, aerospace, nuclear energy and petrochemical industries. The main products are hot rolled and forged bars, cold drawn bars, plates and strips, wire, pipes, rings and forgings etc. Alloy composition is divided into ordinary and high quality, high-quality Inconel 718 alloy carbon, niobium, sulfur and gas content control is more strict, mainly used for manufacturing all kinds of rotating parts.The processing technology can be divided into standard, high strength and direct aging. High strength and direct aging process are used for high quality Inconel 718 alloy forgings. The hot deformation temperature decreases successively, the average grain size of forgings refines successively and the strength increases successively, which can meet the application requirements of different rotating parts in aero engine.

Process Performance and Requirements

• Product Fusion Process

Vacuum Induction Furnace(VIM) and Electroslag Remelting Furnace(ESR)

• Product Chemical Composition

• Product Physical Property

• Product Mechanical Property

• Product Heat Treatment Institution

Wire, 955℃±10℃x1h/AC+720℃士10℃x8h/FC(50℃士10℃/h)→620℃±5℃×(7`8)h/ AC,HRC≥32;

Rods and Forgings,(950~980)℃士10℃x1h/AC+720℃±5℃x8h/FC(50℃士10℃/h)→620℃±5℃ x8h/AC,HB≥346;

Plate and Welding Parts

Institution I:(940~960)℃/AC+(710~730)℃x(8~8.5)h/FC(50℃±10℃/h)→(615~620)℃x(8~8.5)h/AC, Solid Solution Holding time:(d)≤3mm,(25~30)min;(d)3mm~5mm,(30~35)min;

Tube,955℃士10℃x30min/AC(or air cooled)+720℃±10℃x8h/FC(50℃±10℃/h)→620℃±10℃,Make the total holding time not less than 18h, air cooled or forced air cooled

• Direct Aging Treatment

Direct aging treatment for disk forgings:720℃士10℃x8h/FC(50℃±10℃/h)→620℃±10℃x8h/AC

• Productive Process

• Professional Customization