1. Chemical Composition (Weight %, ASTM Standard)
| Element | Max Content | Function Description |
| Carbon (C) | ≤0.03% | Ultra-low carbon avoids chromium carbide precipitation after welding, eliminates intergranular corrosion |
| Silicon (Si) | ≤1.00% | Deoxidizer, improves high-temperature oxidation resistance |
| Manganese (Mn) | ≤2.00% | Enhances ductility and hot rolling workability |
| Phosphorus (P) | ≤0.045% | Minor impurity, controlled for ductility |
| Sulphur (S) | ≤0.030% | Lower sulfur ensures excellent weldability |
| Chromium (Cr) | 18.00–20.00% | Forms passive Cr₂O₃ film for rust & acid resistance |
| Nickel (Ni) | 8.00–12.00% | Stabilizes austenite structure, boosts cold forming & low-temperature toughness |
| Nitrogen (N) | ≤0.10% | Auxiliary strength reinforcement |
| Iron (Fe) | Balance | Base matrix |
2. Basic Physical Properties (Annealed State)
| Physical Item | Parameter Value |
| Density | 8.0 g/cm³ (8000 kg/m³) |
| Melting Range | 1400–1455 °C |
| Modulus of Elasticity | 193 GPa |
| Thermal Conductivity (100°C) | 16.2 W/m·K |
| Coefficient of Thermal Expansion | 17.2 ×10⁻⁶ /°C |
| Electrical Resistivity | 0.72 μΩ·m |
| Magnetism | Slightly non-magnetic after full annealing |
3. Mechanical Properties (Solution Annealed Wire Rod, Minimum)
| Mechanical Index | Standard Value |
| Tensile Strength | ≥485 MPa (70 ksi) |
| 0.2% Offset Yield Strength | ≥170 MPa (25 ksi) |
| Elongation (50mm gauge length) | ≥35% |
| Brinell Hardness | ≤201 HB |
Processing Feature
Excellent cold drawing, forging, bending and stamping performance; no post-weld heat treatment required.
4. Surface Finishes of 304L Wire Rod
●Hot Rolled Black Surface Original as-rolled surface with black oxide scale, low cost, suitable for deep drawing & subsequent pickling processing.
●Pickled Bright Surface (Common Export Grade) Descaled via acid pickling, uniform silvery matte finish, clean surface without oxide, directly usable for drawing, fastener manufacturing.
●Fine Polished Surface Extra grinding & polishing, smooth mirror-like surface, applied for decorative wire, precision hardware.
●Annealed & Oil-Coated Anti-rust oil coated after annealing & pickling, prevents oxidation during sea transportation & storage.
5. Core Advantages of 304L Wire Rod
Ultra-low carbon design: Outstanding anti-intergranular corrosion performance after welding; no sensitization risk.
Universal corrosion resistance: Resists atmospheric, fresh water, weak acid & alkaline medium erosion.
Superior formability & weldability: Easy to process into wire, bolts, nuts, springs without cracking.
Hygienic & non-toxic: Compliant with food & medical contact standards.
Stable low-temperature toughness: No brittle failure under cryogenic environment.
6. Main Industrial Applications
Fastener Manufacturing Bolts, screws, nuts, rivets, threaded fittings for machinery, construction, pipeline projects.
Wire Drawing & Metal Mesh Welding wire, woven wire mesh, filter mesh, stainless steel rope, binding wire.
Food & Beverage Equipment Mixers, conveying parts, sanitary pipe fittings, food machinery structural components.
Chemical & Pharmaceutical Industry Reactor accessories, fluid handling parts, sterile production line hardware.
Architectural & Decoration Handrail wire, decorative metal parts, curtain wall fixing components.
General Hardware & Auto Parts Springs, stamped components, precision mechanical parts, marine fitting accessories.
Welding Consumables Raw Material Raw rod for stainless steel welding wire production.
7. Delivery Specifications
Diameter Range: 5.5mm – 16mm standard wire rod coils
Coil Weight: 1000–2500kg per coil (customizable)
Packaging: Plastic film wrapped + steel strip bundling for ocean shipment
