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Technical Specifications
Product Overview
Metallurgical Characteristics
GH3625 is a solid-solution strengthened nickel-chromium-molybdenum superalloy with exceptional resistance to oxidation and corrosion. The alloy's austenitic structure remains stable across a wide temperature range, while niobium additions provide precipitation hardening through the formation of gamma-double-prime (γ'') and delta (δ) phases. The high molybdenum and chromium content ensures superior resistance to pitting, crevice corrosion, and stress corrosion cracking.
Heat Treatment Process
MetalZenith employs precise heat treatment protocols for GH3625, including solution annealing at 1150-1177°C followed by rapid cooling to achieve optimal mechanical properties. Age hardening treatments at 650-750°C can be applied to enhance strength through controlled precipitation of strengthening phases. Our controlled atmosphere furnaces ensure consistent results and prevent oxidation during processing.
Manufacturing Process
Our GH3625 production begins with vacuum induction melting (VIM) of high-purity raw materials, followed by vacuum arc remelting (VAR) or electroslag remelting (ESR) to achieve superior cleanliness and homogeneity. Hot working operations including forging, rolling, and extrusion are performed within carefully controlled temperature ranges to optimize grain structure and mechanical properties. Cold working and intermediate annealing cycles are employed for precise dimensional control.
Quality Standards & Testing
MetalZenith maintains comprehensive quality control throughout GH3625 production, including chemical analysis by optical emission spectroscopy (OES) and X-ray fluorescence (XRF), mechanical testing per ASTM standards, ultrasonic testing for internal soundness, and microstructural examination. All products comply with aerospace specifications including AMS 5599 and nuclear standards such as ASME Section III. Complete material traceability and documentation are provided with each shipment.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 58.0 min |
| Chromium (Cr) | 20.0-23.0 |
| Molybdenum (Mo) | 8.0-10.0 |
| Niobium + Tantalum (Nb+Ta) | 3.15-4.15 |
| Iron (Fe) | ≤ 5.0 |
| Carbon (C) | ≤ 0.10 |
| Manganese (Mn) | ≤ 0.50 |
| Silicon (Si) | ≤ 0.50 |
| Phosphorus (P) | ≤ 0.015 |
| Sulfur (S) | ≤ 0.015 |
| Aluminum (Al) | ≤ 0.40 |
| Titanium (Ti) | ≤ 0.40 |
| Cobalt (Co) | ≤ 1.0 |
⚙️ Mechanical Properties
| Property | Value | Test Condition |
|---|---|---|
| Tensile Strength | ≥ 827 MPa | Room Temperature |
| Yield Strength (0.2% Offset) | ≥ 414 MPa | Room Temperature |
| Elongation | ≥ 30% | Room Temperature |
| Reduction of Area | ≥ 50% | Room Temperature |
| Hardness (HB) | 240-290 | Annealed Condition |
| Hardness (HRC) | 25-32 | Annealed Condition |
| Impact Energy (Charpy V-notch) | ≥ 120 J | Room Temperature |
| Fatigue Strength (107 cycles) | 380 MPa | Room Temperature |
| Young's Modulus | 208 GPa | Room Temperature |
| Shear Modulus | 81 GPa | Room Temperature |
| Poisson's Ratio | 0.31 | Room Temperature |
🔬 Physical Properties
| Property | Value | Temperature |
|---|---|---|
| Density | 8.44 g/cm³ | 20°C |
| Melting Point | 1290-1350°C | - |
| Thermal Conductivity | 9.8 W/m·K | 20°C |
| Thermal Conductivity | 19.4 W/m·K | 540°C |
| Specific Heat Capacity | 410 J/kg·K | 20°C |
| Thermal Expansion Coefficient | 12.8×10-6/K | 20-100°C |
| Thermal Expansion Coefficient | 14.6×10-6/K | 20-650°C |
| Electrical Resistivity | 1.29 µΩ·m | 20°C |
| Magnetic Permeability | 1.0008 | Room Temperature |
| Curie Temperature | -196°C | - |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, square bars, flat bars, plates, sheets, strips, tubes, pipes, forgings, wire |
| Round Bar Diameter | 6mm - 300mm |
| Plate Thickness | 3mm - 100mm |
| Sheet Thickness | 0.5mm - 6mm |
| Tube Outer Diameter | 6mm - 219mm |
| Wire Diameter | 0.1mm - 10mm |
| Length | Up to 12 meters (custom lengths available) |
| Surface Finish | Hot rolled, cold rolled, annealed, pickled, polished, machined |
| Dimensional Tolerance | ±0.1mm to ±0.5mm (depending on form and size) |
| International Standards | ASTM B443, AMS 5599, UNS N06625, DIN 2.4856, EN 10216-5 |
| Heat Treatment Condition | Solution annealed, aged, stress relieved |
| Testing Certificates | Mill Test Certificate (MTC), Material Test Certificate (3.1/3.2) |
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Our Advantages in Processing GH3625
Advanced Vacuum Melting Technology
MetalZenith employs cutting-edge vacuum induction melting (VIM) and vacuum arc remelting (VAR) processes to achieve superior chemical homogeneity and eliminate inclusions, resulting in GH3625 with exceptional mechanical properties and enhanced fatigue resistance.
Comprehensive Quality Control System
Our integrated quality management system features real-time process monitoring, advanced spectroscopic analysis, mechanical testing laboratories, and complete traceability from raw materials to finished products, ensuring consistent GH3625 quality that exceeds industry standards.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision machining, heat treatment optimization, and specialized surface treatments. Our global distribution network ensures reliable GH3625 supply with technical support and engineering consultation worldwide.
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