GH4033
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GH4033
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- Product Description
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- Commodity name: GH4033
GH4033 is a nickel-chromium based precipitation hardening deformable superalloy, mainly used in key components under high temperature and high pressure environments.
Product Description
GH4033 is a nickel-chromium based precipitation-hardening, deformable, high-temperature alloy primarily used in critical components operating under high-temperature and high-pressure environments. Its core characteristics and applications are as follows:
Material Properties
Chemical Composition
Base Elements Nickel (Ni) is the balance, Chromium (Cr) accounts for 19–22%, providing high-temperature oxidation resistance and corrosion resistance Strengthening Elements (Al, 0.6–1.0%), Titanium (Ti, 2.4–2.8%) form the γ' phase (Ni₃(Al,Ti)), Niobium (Nb, 0.9–1.3%) generates carbides to strengthen grain boundaries, Boron (B, ≤0.01%) purifies grain boundaries to improve creep resistance Impurity Control Carbon (C, 0.03–0.08%), Sulfur (≤0.007%), etc., are strictly limited to avoid grain boundary embrittlement Core Performance
High-Temperature Strength Long-term service below 750℃, 650℃ creep strength ≥500MPa (increased by 150% after aging treatment) Oxidation Resistance Below 900℃, a dense Cr₂O₃ oxide film is formed, oxidation rate <0.1g/m²·h Physical Properties Density 8.09 g/cm³, thermal conductivity 11.3–27.6 W/m·K (200–700℃), coefficient of linear expansion 16.3×10⁻⁶/K (20–800℃) Melting Process
● Vacuum Induction Melting (VIM): Vacuum environment reduces gas absorption, electromagnetic stirring improves component uniformity.
● Secondary Refining: Electroslag remelting (ESR) or vacuum arc remelting (VAR), reduces inclusions by more than 70%, refines grains.
Hot Working Forming
● Forging, rolling, etc., give the components the ideal shape, precise temperature control is required to avoid organizational defects. Typical Application Areas
● Energy field, supercritical boiler superheater tubing: withstands 700–750℃ high-temperature steam (0.1–0.3 MPa) and flue gas corrosion.
● Aerospace, aero-engine rotor/turbine disc: service life exceeding 30,000 hours under 650℃, 15000 rpm conditions.
● Industrial equipment, chemical reactor lining: sulfur corrosion resistance is 5 times higher than that of 316L material.
Performance Upgrade Direction
● Composition optimization: Adding 1.2% Niobium (Nb) increases the 800℃ creep strength by 23%.
● Surface treatment: Aluminizing or Al₂O₃/Y₂O₃ composite coating, thermal shock resistance >1500 cycles.
● GH4033, through precise component design and strict heat treatment control, has become a key material in extreme high-temperature environments, especially irreplaceable in the energy and aerospace fields.
The company currently owns production equipment such as vacuum melting, electroslag remelting, forging and hot rolling (outsourced), solution treatment, machining, cold drawing, cold rolling (outsourced), and polishing. Our own laboratory can complete the testing of alloy chemical composition, mechanical properties, and flaw detection.
We can independently produce high-performance alloy materials such as nickel-based superalloys, cobalt-based superalloys, precision alloys, and special stainless steels. Products: forgings, billets, coils, bars, slabs/sheets, etc.
High-temperature alloy cobalt-based GH605/Co-50, etc. Iron-based GH1035/GH696, etc. Nickel-based GH901/GH3030/GH3044/GH4033/GH80A/GH90, etc. Corrosion-resistant alloys Inconel600/625/718/X-750/C276, etc. Expansion/precision alloys 4J29/32/33/36, etc.
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