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Technical Specifications
Product Overview
Metallurgical Characteristics
NS334 exhibits a face-centered cubic (FCC) austenitic structure that remains stable across a wide temperature range. The alloy's exceptional corrosion resistance stems from the synergistic effects of chromium, molybdenum, and tungsten additions, which form protective passive films in aggressive environments. The low carbon content minimizes carbide precipitation, maintaining corrosion resistance even in the heat-affected zones of welded structures.
Heat Treatment and Processing
MetalZenith's heat treatment protocol involves solution annealing at 1120-1180°C followed by rapid cooling to achieve optimal microstructure. This process dissolves any precipitates and ensures maximum corrosion resistance. Cold working can be applied to increase strength, with intermediate annealing cycles employed for heavy deformation. The alloy demonstrates excellent hot workability between 1000-1200°C.
Manufacturing Process Excellence
Our manufacturing process begins with vacuum induction melting using high-purity raw materials, followed by vacuum arc remelting for enhanced cleanliness. Hot working operations are performed under controlled atmospheric conditions to prevent oxidation. Precision machining capabilities include CNC turning, milling, and drilling with specialized tooling designed for nickel-based superalloys. Surface treatments include pickling, passivation, and electropolishing for enhanced corrosion resistance.
Quality Standards and Testing
MetalZenith adheres to stringent quality standards including ASTM B575, ASME SB-575, and EN 2.4819. Comprehensive testing protocols encompass chemical analysis via optical emission spectroscopy, mechanical property verification through tensile and impact testing, and specialized corrosion testing in simulated service environments. Non-destructive testing methods include ultrasonic inspection, liquid penetrant testing, and radiographic examination to ensure structural integrity.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | Balance (57.0 min) |
| Chromium (Cr) | 14.5-16.5 |
| Molybdenum (Mo) | 15.0-17.0 |
| Tungsten (W) | 3.0-4.5 |
| Iron (Fe) | 4.0-7.0 |
| Cobalt (Co) | ≤ 2.5 |
| Carbon (C) | ≤ 0.010 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 0.08 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Vanadium (V) | ≤ 0.35 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 690 MPa |
| Yield Strength (Rp0.2) | ≥ 283 MPa |
| Elongation (A5) | ≥ 40% |
| Hardness (HB) | ≤ 230 |
| Hardness (HRC) | ≤ 22 |
| Impact Energy (KV) | ≥ 200 J |
| Young's Modulus (E) | 205 GPa |
| Fatigue Limit (10&sup7; cycles) | 310 MPa |
| Poisson's Ratio | 0.31 |
| Reduction of Area | ≥ 65% |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 8.89 g/cm³ |
| Melting Point | 1370°C |
| Thermal Conductivity (100°C) | 10.1 W/m·K |
| Thermal Conductivity (500°C) | 17.8 W/m·K |
| Thermal Expansion (20-100°C) | 11.2×10-6/K |
| Thermal Expansion (20-500°C) | 12.4×10-6/K |
| Specific Heat Capacity | 427 J/kg·K |
| Electrical Resistivity (20°C) | 1.29 µΩ·m |
| Magnetic Permeability | 1.002 (Non-magnetic) |
| Curie Temperature | Not applicable |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, plates, sheets, tubes, pipes, forgings, flanges |
| Round Bar Diameter | 6mm - 300mm |
| Plate Thickness | 3mm - 100mm |
| Sheet Thickness | 0.5mm - 6mm |
| Tube Outer Diameter | 6mm - 219mm |
| Standards Compliance | ASTM B575, ASME SB-575, EN 2.4819, JIS NW276, GB/T 15007 |
| Surface Finish | Hot rolled, cold rolled, annealed, pickled, polished |
| Dimensional Tolerance | ±0.1mm to ±0.5mm (depending on form and size) |
| Length Options | Standard lengths: 3m, 6m, 12m; Custom lengths available |
| Certifications | Mill Test Certificate (MTC), Third-party inspection, Material certificates |
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Our Advantages in Processing NS334
Advanced Vacuum Melting Technology
MetalZenith employs cutting-edge vacuum induction melting (VIM) and vacuum arc remelting (VAR) processes to produce NS334 with exceptional purity and homogeneity. Our controlled atmosphere melting eliminates impurities and ensures optimal chemical composition consistency, resulting in superior corrosion resistance and mechanical properties.
Comprehensive Quality Control System
Our integrated quality management system features advanced spectroscopic analysis, mechanical testing laboratories, and non-destructive testing capabilities. Every NS334 batch undergoes rigorous chemical composition verification, mechanical property testing, and corrosion resistance evaluation to guarantee compliance with international standards and customer specifications.
Custom Processing and Global Supply
MetalZenith offers extensive customization capabilities including precision machining, heat treatment optimization, and specialized surface treatments for NS334. Our global supply chain network ensures reliable delivery worldwide, supported by technical engineering services and application-specific material recommendations for optimal performance.
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