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Technical Specifications
Product Overview
Metallurgical Characteristics
UNS N06985 (Hastelloy G-3) is an austenitic nickel-chromium-molybdenum alloy with exceptional corrosion resistance in both oxidizing and reducing environments. The alloy's microstructure consists of a stable austenitic matrix with optimized chromium and molybdenum content for superior resistance to localized corrosion, including pitting, crevice corrosion, and stress corrosion cracking.
Heat Treatment and Processing
MetalZenith employs precise solution annealing at 1120-1180°C followed by rapid cooling to achieve optimal corrosion resistance and mechanical properties. The alloy cannot be hardened by precipitation hardening but can be strengthened through cold working. Our controlled atmosphere processing prevents carbide precipitation and maintains the alloy's corrosion-resistant properties.
Manufacturing Process Excellence
Our advanced manufacturing process begins with vacuum induction melting (VIM) using high-purity raw materials, followed by vacuum arc remelting (VAR) for enhanced cleanliness and homogeneity. Hot working operations are performed within precise temperature ranges (1010-1200°C) to ensure optimal grain structure and mechanical properties. Cold working capabilities enable achievement of higher strength levels when required.
Quality Standards and Certifications
All UNS N06985 products manufactured by MetalZenith comply with ASTM B582, ASME SB-582, and international standards including DIN 2.4619. Our quality management system maintains ISO 9001:2015 certification with NACE compliance for critical applications. Comprehensive testing includes chemical analysis by ICP-OES, mechanical testing per ASTM standards, and specialized corrosion testing to verify performance in specific environments. Each shipment includes complete material test certificates with full traceability documentation.
🧪 Chemical Composition
Element | Composition (%) |
---|---|
Nickel (Ni) | 44.0 - 47.0 |
Chromium (Cr) | 21.0 - 23.5 |
Molybdenum (Mo) | 6.0 - 8.0 |
Iron (Fe) | 18.0 - 21.0 |
Tungsten (W) | 1.0 - 2.5 |
Copper (Cu) | 1.5 - 2.5 |
Cobalt (Co) | ≤ 2.0 |
Carbon (C) | ≤ 0.015 |
Manganese (Mn) | ≤ 1.0 |
Silicon (Si) | ≤ 1.0 |
Phosphorus (P) | ≤ 0.040 |
Sulfur (S) | ≤ 0.030 |
⚙️ Mechanical Properties
Property | Value |
---|---|
Tensile Strength (Room Temperature) | ≥ 690 MPa |
Yield Strength (0.2% Offset) | ≥ 310 MPa |
Elongation in 50mm | ≥ 40% |
Hardness (Brinell) | ≤ 241 HB |
Hardness (Rockwell B) | ≤ 99 HRB |
Young's Modulus | 207 GPa |
Shear Modulus | 81 GPa |
Poisson's Ratio | 0.278 |
Impact Strength (Charpy V-notch) | ≥ 203 J |
Fatigue Strength (10&sup7; cycles) | 310 MPa |
🔬 Physical Properties
Property | Value |
---|---|
Density | 8.22 g/cm³ |
Melting Point | 1325-1370°C |
Thermal Conductivity (100°C) | 10.5 W/m·K |
Thermal Conductivity (500°C) | 18.4 W/m·K |
Thermal Expansion (20-100°C) | 12.4×10-6/K |
Thermal Expansion (20-500°C) | 13.8×10-6/K |
Specific Heat Capacity | 427 J/kg·K |
Electrical Resistivity (20°C) | 1.18 µΩ·m |
Magnetic Permeability | 1.002 (Essentially Non-magnetic) |
Curie Temperature | Not Applicable |
📏 Product Specifications
Specification | Available Options |
---|---|
Product Forms | Plate, Sheet, Strip, Bar, Rod, Wire, Tube, Pipe, Forging |
Plate Thickness | 6mm - 150mm |
Sheet Thickness | 0.5mm - 6mm |
Bar Diameter | 6mm - 300mm |
Tube OD Range | 6mm - 219mm |
Wire Diameter | 0.1mm - 10mm |
Standards | ASTM B582, ASME SB-582, UNS N06985, DIN 2.4619 |
Surface Finish | Mill Finish, Pickled, Polished, Custom |
Tolerance | ASTM Standard, Custom Precision Available |
Condition | Solution Annealed, Cold Worked |
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Our Advantages in Processing UNS N06985

Advanced Vacuum Melting Technology
MetalZenith utilizes cutting-edge vacuum induction melting (VIM) and vacuum arc remelting (VAR) processes to produce UNS N06985 with exceptional purity and homogeneity. Our controlled atmosphere melting eliminates inclusions and ensures optimal chemical composition consistency throughout the entire alloy structure.
Comprehensive Quality Control Systems
Our state-of-the-art testing laboratory employs advanced spectroscopic analysis, mechanical testing equipment, and corrosion testing facilities to verify every aspect of UNS N06985 performance. Each batch undergoes rigorous inspection with full traceability documentation and international certification compliance.


Custom Processing and Global Distribution
MetalZenith offers extensive customization capabilities including precision machining, specialized heat treatments, and custom dimensions to meet specific application requirements. Our global supply chain network ensures reliable delivery worldwide with comprehensive technical support and engineering consultation services.
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