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304 Stainless Steel Round Bar
304 Stainless Steel Round Bar is a highly versatile and widely used material in a variety of industrial and commercial applications. Known for its excellent corrosion resistance, high strength, and aesthetic appeal, this grade of stainless steel is perfect for projects that require both durability and reliability. 304 stainless steel round bars are available in a range of diameters and lengths, ensuring they can be tailored to meet the specific requirements of your projects. With its well-balanced properties, 304 Stainless Steel is commonly used in industries like construction, automotive, food processing, and medical.
- Product Introduction
Global Standards & Certifications
| Region | Standard | Designation |
|---|---|---|
| USA | ASTM A276/A479 | UNS S30400 |
| Europe | EN 1.4301 | X5CrNi18-10 |
| China | GB/T 1220 | 06Cr19Ni10 |
| Japan | JIS SUS 304 | - |
| India | IS 6601 | SS304 |
Chemical Composition (Weight %)
| Element | Content | Role |
|---|---|---|
| Carbon (C) | ≤0.08% | Balances strength & weldability |
| Chromium (Cr) | 18.0–20.0% | Enhances oxidation resistance |
| Nickel (Ni) | 8.0–10.5% | Stabilizes austenitic structure |
| Manganese (Mn) | ≤2.0% | Improves hot workability |
| Silicon (Si) | ≤0.75% | High-temperature strength |
| Phosphorus (P) | ≤0.045% | - |
| Sulfur (S) | ≤0.03% | - |
| Iron (Fe) | Balance | Base metal |
Mechanical & Physical Properties
Mechanical (ASTM A276)
Tensile Strength: 515–720 MPa
Yield Strength (0.2% Offset): ≥205 MPa
Elongation at Break: ≥40%
Hardness: ≤90 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
Top 4 Industrial Advantages
Corrosion Resistance: Resists oxidation, acids, and chloride exposure (e.g., coastal or chemical environments).
Machinability & Weldability: Performs well with standard fabrication techniques; no post-weld annealing required.
Temperature Tolerance: Operates reliably from -196°C (cryogenic) to 870°C (intermittent heat).
Aesthetic Versatility: Polishes to mirror finishes for architectural or sanitary applications.
Key Applications
| Industry | Typical Uses |
|---|---|
| Construction | Bolts, shafts, structural supports, bridges |
| Food & Beverage | Processing equipment, tanks, conveyor systems |
| Automotive | Exhaust systems, fasteners, engine components |
| Pharmaceuticals | Hygienic piping, reactor vessels |
| Energy | Heat exchangers, turbine parts |
FAQs for Engineers & Buyers
Q1: How does 304 differ from 304L round bars?
A: 304 has a higher carbon content (≤0.08% vs. 304L's ≤0.03%), making 304L preferable for heavy welding. 304 offers better strength for non-welded applications.
Q2: Can 304 round bars be used in marine environments?
A: Suitable for short-term exposure; for prolonged saltwater contact, consider 316/L grades.
Q3: Is 304 stainless steel magnetic?
A: Non-magnetic in annealed state; slight magnetism may occur after cold working.
Why Partner With Us?
Full Traceability: Mill Test Certificates (EN 10204 3.1) with chemical/mechanical data.
Custom Solutions: Diameters 3mm–300mm, lengths up to 6m (±0.1mm tolerance).
Fast Turnaround: 15–25 days global delivery (FOB, CIF, DDP terms available).
Sustainability: 70% recycled content, ISO 14001-certified production.
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