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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI 904L exhibits a fully austenitic microstructure at room temperature due to its high nickel content and balanced alloy composition. The material demonstrates exceptional resistance to chloride-induced stress corrosion cracking and maintains structural integrity in highly corrosive environments. The low carbon content (≤ 0.020%) minimizes carbide precipitation, ensuring optimal corrosion resistance even in the heat-affected zones of welded structures.
Heat Treatment Process
MetalZenith employs precise solution annealing at 1100-1200°C followed by rapid water quenching to achieve optimal mechanical properties and corrosion resistance. Our controlled atmosphere furnaces prevent surface oxidation and ensure uniform heating throughout the material cross-section. Post-heat treatment surface conditioning removes any heat tint and restores the passive layer.
Manufacturing Process Excellence
Our integrated manufacturing process begins with vacuum induction melting using premium raw materials, followed by electroslag remelting for enhanced cleanliness. Hot rolling is performed within precise temperature ranges to optimize grain structure, while cold working operations achieve desired mechanical properties and dimensional accuracy. Advanced surface treatment processes ensure superior finish quality and corrosion resistance.
Quality Standards & Testing
MetalZenith maintains compliance with international standards including ASTM A240, EN 10088-2, and JIS G4305. Our quality assurance program encompasses chemical analysis via optical emission spectroscopy, mechanical testing per ASTM standards, intergranular corrosion testing (ASTM A262), and non-destructive testing including ultrasonic and dye penetrant inspection. Mill test certificates provide complete traceability and material verification.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.020 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | 19.0 - 23.0 |
| Nickel (Ni) | 23.0 - 28.0 |
| Molybdenum (Mo) | 4.0 - 5.0 |
| Copper (Cu) | 1.0 - 2.0 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 490 MPa |
| Yield Strength (Rp0.2) | ≥ 220 MPa |
| Elongation (A5) | ≥ 35% |
| Hardness (HB) | ≤ 250 |
| Hardness (HV) | ≤ 270 |
| Impact Energy (KV) at 20°C | ≥ 100 J |
| Young's Modulus (E) | 200 GPa |
| Shear Modulus (G) | 81 GPa |
| Poisson's Ratio | 0.27 - 0.30 |
| Fatigue Limit (10&sup7; cycles) | 245 MPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1300 - 1390°C |
| Thermal Conductivity at 100°C | 12 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 | 1.05 µΩ·m |
| Magnetic Permeability | 1.02 µr (Non-magnetic) |
| Thermal Diffusivity | 3.26 mm²/s |
| Curie Temperature | Non-magnetic |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Plates, Sheets, Bars, Rods, Tubes, Pipes, Forgings, Flanges |
| Plate Thickness | 6 - 200 mm |
| Sheet Thickness | 0.5 - 6 mm |
| Bar Diameter | 10 - 300 mm |
| Tube Outer Diameter | 6 - 610 mm |
| Standards | ASTM A240, A479, A484, EN 10088-2, JIS G4305, GB/T 24511 |
| Surface Finish | 2B, BA, No.4, HL, Mirror, Pickled |
| Tolerance | ±0.1mm (thickness), ±3mm (width), ±6mm (length) |
| Length | 2000 - 12000 mm (standard), Custom lengths available |
| Width | 1000 - 2500 mm (standard), Custom widths available |
Let Us Create Success for Your Project
Professional Team, Premium Products, Complete Service - Your Project Success is Our Mission
Our Advantages in Processing AISI 904L
Advanced Vacuum Melting Technology
MetalZenith employs cutting-edge vacuum induction melting (VIM) and electroslag remelting (ESR) processes to achieve superior chemical homogeneity and minimize inclusions in AISI 904L production. Our controlled atmosphere melting ensures optimal alloy composition and exceptional material purity.
Comprehensive Quality Control System
Our state-of-the-art testing laboratory features advanced spectroscopic analysis, mechanical testing equipment, and specialized corrosion testing facilities. Every batch undergoes rigorous inspection including ultrasonic testing, dye penetrant inspection, and intergranular corrosion testing to guarantee material integrity.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision machining, specialized heat treatments, and custom dimensions. Our global distribution network and strategic inventory management ensure reliable supply chain support with competitive lead times for projects worldwide.
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