NCF750
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The alloy is a corrosion-resistant, oxidation-resistant, and high-strength precipitation-hardening alloy. It is mainly a nickel-based superalloy that is age-hardened by the γ'' phase. Its operating temperature is below 800℃. The alloy exhibits good corrosion and oxidation resistance below 980℃, high strength below 800℃, good creep resistance below 700℃, and good stress-rupture resistance below 540℃. It also possesses good formability and weldability. In the solution-treated state, the alloy has a pure austenitic structure.
Product name：
American standard alloy
Material：
N08810
Warehouse：
Tianjin
Surface treatment：
Pickled/bright/black leather etc.
Category：
Keyword：
NCF750
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Details description
Basic Information
Corresponding Grades: National Standard: GH4145, GH145, 0Cr15Ni70Ti3AlNb; American Standard: Inconel X-750, No7750; German Standard: 2.4669, XCR15FE7TIAL
Implementation Standards: UNS, ASTM, AISI, DIN, GB/T14992, etc.
Density: 8.25g/cm³, Non-magnetic
Chemical Composition
Carbon C≤0.10%, Chromium Cr 14.0% - 17.0%, Nickel Ni≥70.0%, Aluminum Al 0.40% - 1.00%, Iron Fe 5.00% - 9.00%, Niobium Nb 0.70% - 1.20%, Cobalt Co≤1.00%, Manganese Mn≤1.00%, Silicon Si≤0.50%, Sulfur S≤0.010%, Copper Cu≤0.50%, Phosphorus P≤0.02%
Product Specifications
Available in plates, strips, bars, forgings, rings, wires, and tubes.
Processing Properties
Hot deformation temperature: 950 - 1205℃, large deformation preferably at 1040℃. Cold working easily hardens, requiring timely solution treatment to prevent cold cracking.
Heat Treatment Process
Solution heat treatment for plates, strips, and tubes: 980℃±15℃, air cooling. Annealing before welding: 980℃, 1h; Stress relief annealing after welding: 900℃, 2h; Stress relief annealing can also be performed at 885℃±15℃, 24h, air cooling.
Performance Characteristics
Excellent corrosion and oxidation resistance below 980℃, high strength below 800℃, good creep resistance below 700℃, good relaxation resistance below 540℃, and good formability and weldability.
Application Fields
Mainly used to manufacture rings, structural parts, and bolts for aero-engines operating below 800℃ requiring high strength and corrosion resistance, as well as flat springs and coil springs operating below 540℃. It can also be used to manufacture turbine blades for steam turbines, pressure vessels for light water reactors, and parts for pressurized water reactors.
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