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K4169
DLX
Customized
ISO9001, ROHS
10PCS
10-25 days
Nickel-based casting superalloy
Product Description
K4169 is a nickel-iron-chromium superalloy with chemistry related to the 4169 / Alloy 718 material family. It contains controlled additions of niobium, molybdenum, titanium and aluminum.
Niobium promotes the formation of the principal γ″ strengthening phase, while aluminum and titanium contribute to γ′ precipitation. These phases develop during heat treatment and provide the alloy’s characteristic strength and fatigue performance.
Specification
Property | Value |
|---|---|
Material Grade | K4169 / Cast Alloy 718 / 2.4668 |
Melting Technology | Vacuum Induction Melting (VIM) |
Density | 8.19 g/cm³ |
Tensile Strength (Cast+Aged) | ≥ 860 MPa |
Yield Strength (Cast+Aged) | ≥ 725 MPa |
Hardness (HRC) | 30 - 40 HRC |
Inclusion Control | O ≤ 15ppm, N ≤ 10ppm |
Certification | ISO , SGS |
Chemical composition%
Element | Ni | Cr | Nb+Ta | Mo | Ti | Al | Co | Fe |
|---|---|---|---|---|---|---|---|---|
Content (%) | 50.0-55.0 | 17.0-21.0 | 4.75-5.50 | 2.8-3.3 | 0.65-1.15 | 0.2-0.8 | ≤ 1.0 | Bal |
Chromium and aluminum support protective oxide formation, helping qualified K213 components resist high-temperature oxidation in automotive exhaust environments.
The γ′-strengthened Fe-Ni-Cr matrix helps finished cast components retain useful strength during sustained elevated-temperature exposure.
Tungsten provides solid-solution strengthening and contributes to creep resistance and high-temperature load-bearing performance.
K213 offers useful microstructural stability within its qualified operating range, supporting components exposed to repeated engine heating and cooling cycles.
Applications
K4169 master alloy can provide controlled 4169 chemistry for downstream remelting and wrought conversion. Finished aerospace bolts, studs and nuts require qualified wrought rod or wire rather than as-cast master alloy rods.
After approved conversion, heat treatment and forming, wrought 4169 alloy can be used for high-strength aerospace bolts exposed to vibration, fatigue and elevated temperature.
Warm-rolled or cold-formed threaded components can benefit from the alloy’s strength and fatigue resistance when produced through a qualified fastener process.
K4169 is used in precision casting programs for complex engine casings requiring strength, dimensional integration and intermediate-temperature performance.
DLX Advantage
CHANGZHOU DLX ALLOY CO, LTD functions as a high-precision node in the global aerospace supply chain, focusing on the specialized metallurgical needs of the fastener and structural components industry. Since 2002, our 12,000 m² VIM center has been dedicated to bridging the gap between raw alloy synthesis and the extreme reliability required by aerospace flight hardware. We believe that for high-strength fasteners, the material is the first line of defense. By integrating rigid international standard compliance with a proactive "Synergy" approach, we provide our global partners with master alloys that are optimized for both the foundry floor and the most critical high-altitude environments.
FAQ
K4169 is associated with the casting route, while GH4169 is the wrought grade used for forged, rolled or cold-worked products. Aerospace fasteners are normally manufactured from qualified GH4169 or another approved wrought 4169 product.
The wrought and heat-treated alloy provides high strength, fatigue resistance, corrosion resistance and useful performance at temperatures up to approximately 650°C.
Potential applications include bolts, studs, nuts and other threaded fasteners. Each product requires its own material, forming, heat-treatment and inspection qualification.
Typical K4169 cast parts include engine casings, annular rings, housings, volutes and complex thin-wall structural components.
