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Technical Specifications
Product Overview
Metallurgical Characteristics
GH4169 is a precipitation-hardened nickel-iron-chromium superalloy strengthened by gamma prime (Ni3(Al,Ti)) and gamma double prime (Ni3Nb) precipitates. The alloy exhibits exceptional strength retention at elevated temperatures up to 650°C, making it ideal for aerospace and gas turbine applications. MetalZenith's advanced vacuum melting processes ensure minimal segregation and optimal precipitate distribution.
Heat Treatment Process
MetalZenith employs a precise two-stage aging treatment following solution annealing at 980°C. The aging process involves heating at 720°C for 8 hours, furnace cooling to 620°C, holding for 8 hours, then air cooling. This proprietary heat treatment optimizes the precipitation of strengthening phases while maintaining excellent ductility and toughness.
Manufacturing Process
Our GH4169 production begins with vacuum induction melting (VIM) using high-purity raw materials, followed by vacuum arc remelting (VAR) for enhanced cleanliness. Hot working is performed within the temperature range of 1010-1120°C with controlled cooling rates. MetalZenith's advanced thermomechanical processing ensures fine grain structure and optimal mechanical properties.
Quality Standards & Testing
All GH4169 products undergo comprehensive testing including chemical analysis by optical emission spectroscopy, mechanical testing per ASTM E8/E21, ultrasonic inspection per ASTM A388, and microstructural examination. MetalZenith maintains AS9100D aerospace certification and NADCAP accreditation for special processes, ensuring compliance with the most stringent aerospace requirements.
Corrosion Resistance & Environmental Performance
GH4169 exhibits excellent resistance to oxidation and corrosion in high-temperature environments. The high chromium content provides superior oxidation resistance up to 980°C, while the nickel matrix ensures excellent corrosion resistance in various chemical environments. MetalZenith's controlled chemistry and processing enhance these properties for demanding applications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 0.35 |
| Silicon (Si) | ≤ 0.35 |
| Phosphorus (P) | ≤ 0.015 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | 17.0-21.0 |
| Nickel (Ni) | 50.0-55.0 |
| Molybdenum (Mo) | 2.8-3.3 |
| Niobium (Nb) | 4.75-5.50 |
| Titanium (Ti) | 0.65-1.15 |
| Aluminum (Al) | 0.20-0.80 |
| Cobalt (Co) | ≤ 1.0 |
| Copper (Cu) | ≤ 0.30 |
| Boron (B) | 0.002-0.006 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value | Test Temperature |
|---|---|---|
| Tensile Strength | ≥ 1275 MPa | Room Temperature |
| Yield Strength (0.2% offset) | ≥ 1035 MPa | Room Temperature |
| Elongation | ≥ 12% | Room Temperature |
| Reduction of Area | ≥ 15% | Room Temperature |
| Hardness (HRC) | 36-43 | Room Temperature |
| Impact Energy (Charpy V-notch) | ≥ 27 J | Room Temperature |
| Young's Modulus | 200 GPa | Room Temperature |
| Tensile Strength (High Temp) | ≥ 1035 MPa | 650°C |
| Yield Strength (High Temp) | ≥ 690 MPa | 650°C |
| Fatigue Strength (10^7 cycles) | 620 MPa | Room Temperature |
| Creep Rupture (1000h) | 690 MPa | 650°C |
🔬 Physical Properties
| Property | Value | Temperature Range |
|---|---|---|
| Density | 8.19 g/cm³ | 20°C |
| Melting Point | 1260-1336°C | - |
| Thermal Conductivity | 11.4 W/m·K | 20°C |
| Thermal Conductivity (High Temp) | 18.6 W/m·K | 650°C |
| Thermal Expansion Coefficient | 13.0×10-6/K | 20-100°C |
| Thermal Expansion (High Temp) | 14.8×10-6/K | 20-650°C |
| Specific Heat Capacity | 435 J/kg·K | 20°C |
| Electrical Resistivity | 1.25 µΩ·m | 20°C |
| Magnetic Permeability | 1.0011 | Room Temperature |
| Poisson's Ratio | 0.294 | Room Temperature |
| Thermal Diffusivity | 3.2×10-6 m²/s | 20°C |
📏 Product Specifications
| Specification | Available Options | Standards |
|---|---|---|
| Product Forms | Round bars, square bars, flat bars, plates, sheets, forgings, rings | ASTM B637, AMS 5663 |
| Round Bar Diameter | 6mm - 500mm | ASTM B637 |
| Square Bar Size | 10mm - 200mm | ASTM B637 |
| Plate Thickness | 6mm - 150mm | ASTM B670 |
| Sheet Thickness | 0.5mm - 6mm | ASTM B670 |
| Surface Finish | Hot rolled, cold drawn, machined, polished | Customer specification |
| Heat Treatment Condition | Solution annealed, aged, solution + aged | AMS 5663, AMS 5664 |
| Dimensional Tolerance | ±0.1mm to ±0.5mm | ASTM standards |
| Length | Up to 6000mm (custom lengths available) | Customer requirement |
| International Standards | ASTM, AMS, EN, JIS, GB | Multiple certifications |
| Testing Certificates | Mill test certificate, material certificate, inspection report | EN 10204 3.1/3.2 |
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Our Advantages in Processing GH4169
Advanced Vacuum Melting Technology
MetalZenith employs state-of-the-art vacuum induction melting (VIM) followed by vacuum arc remelting (VAR) processes, ensuring ultra-clean GH4169 with minimal inclusions and superior metallurgical quality for critical aerospace applications.
Precision Heat Treatment Control
Our proprietary computer-controlled heat treatment processes optimize precipitation hardening, delivering consistent mechanical properties and maximum strength retention at elevated temperatures up to 650°C.
Comprehensive Testing & Certification
MetalZenith provides complete material traceability with AS9100D aerospace certification, NADCAP accreditation, and full test documentation including chemical analysis, mechanical properties, and microstructural verification.
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