20 Years Experience | 1000+ Brand Partners | Full Customization
We have 20 years of industry experience, have partnered with over 1,000 brands, and support any customization needs.
Technical Specifications
Product Overview
Metallurgical Characteristics
UNS N08020 is an austenitic stainless steel with a face-centered cubic crystal structure that remains stable across a wide temperature range. The alloy's exceptional corrosion resistance stems from its balanced composition of chromium, nickel, molybdenum, and copper, which forms a highly protective passive oxide layer. The addition of niobium provides stabilization against carbide precipitation, ensuring long-term corrosion resistance in sensitizing temperature ranges.
Heat Treatment Process
MetalZenith employs precise solution annealing at 1120-1150°C followed by rapid water quenching to achieve optimal properties. This treatment dissolves carbides and ensures a homogeneous austenitic structure. Our controlled atmosphere furnaces prevent surface oxidation and maintain dimensional stability. Post-annealing pickling and passivation treatments enhance corrosion resistance and surface quality.
Manufacturing Process Excellence
Our manufacturing process begins with vacuum induction melting using premium raw materials, followed by electroslag remelting for enhanced cleanliness. Hot working operations are performed within precise temperature windows (1050-1200°C) to optimize grain structure. Cold working processes utilize advanced rolling and drawing techniques to achieve superior surface finish and dimensional accuracy while maintaining mechanical properties.
Quality Standards & Testing
Every production lot undergoes comprehensive testing including chemical analysis by optical emission spectroscopy, mechanical testing per ASTM standards, intergranular corrosion testing (ASTM A262 Practice E), and microstructural examination. Non-destructive testing including ultrasonic inspection and eddy current testing ensures internal soundness. Complete mill test certificates and third-party inspection reports are provided with each shipment, ensuring full traceability and compliance with international quality standards.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.07 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | 19.0 - 21.0 |
| Nickel (Ni) | 32.0 - 38.0 |
| Molybdenum (Mo) | 2.0 - 3.0 |
| Copper (Cu) | 3.0 - 4.0 |
| Niobium (Nb) | 8 × C min, 1.0 max |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 550 MPa (80 ksi) |
| Yield Strength (0.2% offset) | ≥ 240 MPa (35 ksi) |
| Elongation in 50mm | ≥ 30% |
| Reduction of Area | ≥ 50% |
| Hardness (Brinell) | ≤ 217 HB |
| Hardness (Rockwell B) | ≤ 95 HRB |
| Impact Energy (Charpy V-notch at 20°C) | ≥ 100 J |
| Fatigue Limit (107 cycles) | 240 MPa |
| Modulus of Elasticity | 200 GPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 8.08 g/cm³ |
| Melting Point | 1350-1400°C |
| Thermal Conductivity (at 100°C) | 16.3 W/m·K |
| Thermal Expansion (20-100°C) | 14.2×10-6/K |
| Thermal Expansion (20-300°C) | 15.1×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (at 20°C) | 1.02 µΩ·m |
| Magnetic Permeability | 1.02 (essentially non-magnetic) |
| Curie Temperature | Not applicable (austenitic) |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Round bars, square bars, flat bars, plates, sheets, strips, tubes, pipes, forgings |
| Round Bar Sizes | 6mm - 300mm diameter |
| Plate Thickness | 3mm - 100mm |
| Sheet Thickness | 0.5mm - 6mm |
| Tube Sizes | 6mm - 219mm OD, 0.5mm - 20mm wall thickness |
| Standards Compliance | ASTM B729, ASME SB-729, UNS N08020, DIN 2.4660 |
| Surface Finishes | Hot rolled, cold rolled, bright annealed, pickled, polished (2B, BA, No.4, No.8) |
| Dimensional Tolerances | ±0.1mm to ±0.5mm depending on product form and size |
| Length Options | Standard lengths 3m, 6m, 12m or cut to customer requirements |
Let Us Create Success for Your Project
Professional Team, Premium Products, Complete Service - Your Project Success is Our Mission
Our Advantages in Processing UNS N08020
Advanced Vacuum Melting Technology
MetalZenith employs cutting-edge vacuum induction melting (VIM) followed by electroslag remelting (ESR) to achieve exceptional chemical homogeneity and ultra-low inclusion content in UNS N08020, ensuring superior corrosion resistance and mechanical properties.
Comprehensive Quality Control System
Our state-of-the-art testing laboratory performs complete chemical analysis, mechanical testing, intergranular corrosion testing (ASTM A262), and microstructural examination on every heat, ensuring consistent quality and compliance with international standards.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision machining, heat treatment optimization, and specialized surface treatments, backed by our global distribution network ensuring timely delivery of UNS N08020 products worldwide.
YOUR TRUSTED STEEL
MANUFACTURING PARTNER
Quick Inquiry
Industries We Serve
Professional steel solutions across major industries
Qualifications & Certifications
