304l Stainless Steel Bar
The 304L Stainless Steel Bar is a versatile, low-carbon version of the widely-used 304 stainless steel. Known for its excellent corrosion resistance, weldability, and formability, this bar stock is widely used in industries requiring high strength and durability in various applications. With a carbon content of less than 0.03%, 304L stainless steel bars offer superior resistance to carbide precipitation during welding, making them ideal for applications in harsh environments. Whether you’re using them for structural, mechanical, or aesthetic purposes, 304L Stainless Steel Bars deliver reliability and performance across the board.
- Product Introduction
Global Standards & Certifications
| Country/Region | Standard | Designation |
|---|---|---|
| USA | ASTM A276/A479 | UNS S30403 |
| Europe | EN 1.4307 | X2CrNi18-9 |
| China | GB/T 1220 | 00Cr19Ni10 |
| Japan | JIS SUS 304L | - |
| India | IS 6601 | SS304L |
Chemical Composition (Weight %)
| Element | Content | Role |
|---|---|---|
| Carbon (C) | ≤0.03% | Reduces carbide precipitation |
| Chromium (Cr) | 18.0–20.0% | Enhances corrosion resistance |
| Nickel (Ni) | 8.0–12.0% | Stabilizes austenitic structure |
| Manganese (Mn) | ≤2.0% | Improves workability |
| Silicon (Si) | ≤0.75% | Enhances high-temperature strength |
| Phosphorus (P) | ≤0.045% | - |
| Sulfur (S) | ≤0.03% | - |
| Iron (Fe) | Balance | Base metal |
Mechanical & Physical Properties
Mechanical (ASTM A276)
Tensile Strength: 485–620 MPa
Yield Strength (0.2% Offset): ≥170 MPa
Elongation at Break: ≥40%
Hardness: ≤92 HRB (Annealed)
Modulus of Elasticity: 193 GPa
Physical
Density: 8.0 g/cm³
Melting Point: 1.400–1.450°C
Thermal Conductivity: 16.2 W/m·K (at 100°C)
Electrical Resistivity: 0.72 μΩ·m
5 Key Advantages for Industrial Buyers
Weldability Excellence: Low carbon content prevents sensitization, ideal for heavy welding without post-weld annealing.
Corrosion Resistance: Resists pitting, crevice corrosion, and oxidation in acidic/chloride-rich environments (e.g., marine, chemical plants).
Versatility: Available in round, square, hex, and flat bars with surface finishes (hot-rolled, cold-drawn, polished).
Cost-Effective Maintenance: Long service life reduces replacement costs in infrastructure projects.
Eco-Friendly: 100% recyclable with ≥60% recycled content.
Industrial Applications
| Sector | Typical Uses |
|---|---|
| Oil & Gas | Valve stems, pump shafts, offshore rig components |
| Food & Beverage | Conveyor systems, fermentation tanks, mixers |
| Pharmaceuticals | Reactor vessels, piping, sterile equipment |
| Construction | Fasteners, structural supports, bridges |
| Marine | Boat fittings, desalination units, propeller shafts |
FAQs
Q1: How does 304L differ from standard 304 stainless steel bars?
A: 304L has a maximum 0.03% carbon (vs. 0.08% in 304), reducing weld decay risk. Choose 304L for welded assemblies exposed to corrosive environments.
Q2: Can 304L bars withstand temperatures below freezing?
A: Yes, it maintains toughness down to -196°C, suitable for cryogenic storage tanks.
Why Partner With Us?
Certified Quality: Full traceability with EN 10204 3.1/3.2 certifications.
Customization: Diameters 5mm–300mm, lengths up to 6m, and bespoke tolerances (±0.05mm).
Fast Logistics: Doorstep delivery in 20 days globally (EXW, FOB, CIF terms).
Technical Support: Free metallurgical consultation for project-specific requirements.
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