GH4169 High Temperature Alloy Powder

GH4169 is a high-temperature nickel-based superalloy known for its excellent mechanical properties and resistance to high-temperature environments. When GH4169 is in the form of a powder, it retains the material properties of the bulk alloy but may exhibit some unique characteristics due to its particulate nature. Here are the key material properties of GH4169 high-temperature alloy powder:

Chemical Composition

• Nickel (Ni): 50-55%

• Chromium (Cr): 17-21%

• Iron (Fe): 1.5-5.0%

• Molybdenum (Mo): 2.8-3.3%

• Niobium (Nb): 2.8-3.3%

• Aluminum (Al): 0.35-0.80%

• Titanium (Ti): 0.65-1.15%

• Carbon (C): 0.05-0.15%

• Boron (B): 0.001-0.015%

• Silicon (Si): 0.35% max

• Manganese (Mn): 0.35% max

• Sulfur (S): 0.015% max

Physical Properties

• Density: Approximately 8.24 g/cm³

• Mel ting Point: 1350-1380°C

Mechanical Properties

• Yield Strength (at 20°C): 830-960 MPa

• Ult imate Tensile Strength (at 20°C): 1200-1400 MPa

• Elong ation (at 20°C): 15-25%

• Modulus of Elasticity: 200-210 GPa

• Creep Strength: High creep strength at temperatures up to 700°C

Thermal Properties

• Coefficient of Thermal Expansion (20-1000°C): 11.5-12.5 x 10^-6 /°C

• Thermal Conductivity (at 20°C): 13-15 W/(m·K)

• Specific Heat Capacity (at 20°C): 440-460 J/(kg·K)

Powder Characteristics

• Particle Size Distribution: Typically ranges from 15 to 150 microns, with a median particle size of around 50-70 microns.

• Particle Shape: Spherical or near-spherical to ensure good flowability and packing density.

• Surface Area: Higher surface area compared to bulk material, which can affect reactivity and sintering behavior.

• Apparent Density: Typically 2.8-3.2 g/cm³

Applications

• Add itive Manufacturing: Used in processes like Selective Laser Melting (SLM) and Electron Beam Melting (EBm) to create complex, high-performance parts for aerospace, automotive, and industrial gas turbines.

• Thermal Spraying: Used in thermal spray coatings to enhance the wear and corrosion resistance of components.

• Powder Metallurgy: Used in the production of high-temperature components through techniques like hot isostatic pressing (HIP).

Processing Considerations

• o xidation Resistance: Excellent resistance to oxidation up to 760°C.

• Corrosion Resistance: Good resistance to various forms of corrosion, including pitting and crevice corrosion.

• Weldability: Can be welded, but requires careful control of heat input and post-weld heat treatment to maintain mechanical properties.

Additional Notes

• Heat Treatment: GH4169 powder can be heat-treated to optimize its mechanical properties. Common heat treatments include solution annealing and aging.

• Post-Processing: Parts made from GH4169 powder often require post-processing steps such as hot isostatic pressing (HIP) to remove porosity and improve mechanical properties.