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Introduction
GH4145(Inconel X-750) alloy is mainly a nickel-based high-temperature alloy that is age-strengthened with γ[Ni3(Al, Ti, Nb)] phase,also known as”super alloy”. It has good corrosion resistance and oxidation resistance below 980℃, and has high strength below 800℃.It has good relaxation resistance when the temperature is below 540℃, and also has good formability and welding performance. Gh4145 alloy is mainly used to manufacture relaxation-resistant flat springs and coil springs for aircraft engines that operate below 800°C and require high strength. It can also be used to manufacture parts such as turbine blades. Available varieties include plates, strips, bars, forgings, rings, wires and tubes.
Chemical components Chemical element composition content（%）
Composition | C | Si | Mn | P | S | Cr | Ni+Co | Ti | Al | Fe | Nb+Ta | Cu |
Min | \ | \ | \ | \ | \ | 14.00 | 70.00 | 2.25 | 0.40 | 5.00 | 0.70 | \ |
Max | 0.08 | 0.50 | 1.00 | 0.015 | 0.010 | 17.00 | \ | 2.75 | 1.00 | 9.00 | 1.20 | 0.50 |
Mechanical properties
Rigidity | Tensile strength | Yield strength | Elongation |
≤400 | ≥995MPa | ≥550MPa | ≥35% |
Physical properties
Density | Melting points | Specific heat | Magnetism | Resistivity | Thermal conductivity | Linear expansivity |
8.25g/cm3 | 1395-1425℃ | 420J/(Kg.℃） | \ | 1.22×10-6Ω·m(20℃) | 15.9W/(m.k)(100℃) | 13.1×10-6/K(200℃) |
Advantages
(1)High temperature strength
(2)Oxidation resistance:
(3)Corrosion resistance:
(4)Processing performance:
(5)Thermal expansion matching:
(6)Fatigue resistance:
(7)Heat treatment adjustability:
Applications
(1)Aerospace field: Turbine blades, combustion chamber components, gas turbine components, etc.
(2) Energy industry:Gas turbine components, boiler pipes and other equipment.
(3)Chemical industry: Chemical reactors, steam generators, petroleum refining equipment, etc.
(4)Automotive industry:high-temperature engine parts, turbochargers and exhaust systems, etc.
(5)Other fields: shipbuilding, medical equipment, chemical industry, electronic equipment and other fields.
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