Stainless Steel Round Bar
✓ Marine-Grade Corrosion Resistance: 316L withstands 5% NaCl brine at 60°C (140°F) with <0.1mm/year corrosion rate.
✓ High-Temperature Stability: Retains strength from -50°C (-58°F) to 800°C (1,472°F) (Grade 310S).
✓ Precision Machinability: Tight ±0.05mm diameter tolerance and Ra ≤1.6μm surface finish for CNC turning, milling, and grinding.
✓ Hygienic & Aesthetic: Polished (Ra ≤0.8μm) or pickled finishes meet FDA/ISO 22000 standards for food and medical use.
Stainless Steel Round Bar (Grades 304, 316L, 430, etc.)
Engineered for industries requiring high mechanical strength, corrosion immunity, and seamless machinability, our stainless steel round bars deliver unmatched performance in harsh environments. Available in Grades 304, 316L, 430, and duplex alloys, these bars excel in applications exposed to seawater, acids, and high temperatures. Certified to ASTM A276, EN 10088, and ISO 6931, they outperform carbon steel with 10x longer lifespan in corrosive settings and offer 100% recyclability for sustainable manufacturing.
| Parameter Category | 304/304L | 316/316L | 430 | Duplex 2205 |
|---|---|---|---|---|
| Material Standard | ASTM A276, A479, EN 1.4301/1.4307 | ASTM A276, A479, EN 1.4401/1.4404 | ASTM A276, EN 1.4016 | ASTM A276, EN 1.4462 |
| Chemical Composition (%) | Cr: 18–20, Ni: 8–10.5, C: ≤0.07 (304) / ≤0.03 (304L), Mn: ≤2.0, Si: ≤1.0, Fe: Balance | Cr: 16–18, Ni: 10–14, Mo: 2–3, C: ≤0.07 (316) / ≤0.03 (316L), Mn: ≤2.0, Si: ≤1.0, Fe: Balance | Cr: 16–18, C: ≤0.12, Mn: ≤1.0, Si: ≤1.0, Fe: Balance | Cr: 21–23, Ni: 4.5–6.5, Mo: 2.5–3.5, N: 0.14–0.20, Mn: ≤2.0, Si: ≤1.0, Fe: Balance |
| Tensile Strength (MPa) | 515–720 | 515–690 | 450–600 | 620–895 |
| Yield Strength (MPa) | ≥205 | ≥205 | ≥240 | ≥450 |
| Elongation (%) | ≥40 (in 50mm) | ≥40 (in 50mm) | ≥20 (in 50mm) | ≥25 (in 50mm) |
| Hardness | Rockwell B70–90 | Rockwell B70–90 | Rockwell B75–95 | Rockwell C22–30 |
| Density (g/cm³) | 8.0 | 8.0 | 7.7 | 7.8 |
| Melting Point (°C) | 1400–1450 | 1375–1400 | 1425–1510 | 1380–1450 |
| Thermal Conductivity (W/m·K) | 16.2 (20°C) | 15.9 (20°C) | 26.0 (20°C) | 15.0 (20°C) |
| Thermal Expansion (10⁻⁶/°C) | 17.2 (20–100°C) | 16.0 (20–100°C) | 10.4 (20–100°C) | 13.0 (20–100°C) |
| Electrical Resistivity (Ω·m) | 0.72 × 10⁻⁶ | 0.74 × 10⁻⁶ | 0.60 × 10⁻⁶ | 0.80 × 10⁻⁶ |
| Corrosion Resistance | Good resistance to oxidizing acids, atmospheric corrosion. Poor in chlorides. | Superior in chlorides, acids, and marine environments. | Moderate resistance to nitric acid. Poor in chlorides. | Excellent in chlorides, acids, and stress corrosion cracking. |
| Heat Treatment | Solution Annealing: 1010–1120°C (rapid cooling). | Solution Annealing: 1010–1120°C (rapid cooling). | Annealing: 790–850°C (slow cooling). | Solution Annealing: 1020–1100°C (water quench). |
| Surface Finishes | Hot Rolled, Cold Drawn, Peeled, Polished (Ra ≤0.8μm). | Same as 304/304L. | Hot Rolled, Annealed & Pickled. | Hot Rolled, Cold Drawn, Polished. |
| Diameter Range (mm) | 5–300 | 5–300 | 5–150 | 5–250 |
| Length (m) | 3–6 (standard), Custom up to 12. | Same as 304/304L. | 3–6 (standard) | 3–6 (standard) |
| Key Applications | Shafts, fasteners, valves, food processing equipment. | Marine hardware, chemical pumps, surgical tools. | Automotive exhausts, cutlery, architectural trim. | Offshore oil/gas components, desalination plants, heat exchangers. |
SStainless Steel Round Bar (Grades 304, 316L, 430, etc.) Applications
| Industry | Critical Use Cases | Stainless Steel Round Bar Advantage |
|---|---|---|
| Marine Engineering | Propeller shafts, valve stems | 316L resists pitting in saltwater for 15+ years. |
| Food & Beverage | Mixer shafts, conveyor rollers | Polished 304 meets FDA standards for hygiene. |
| Chemical Processing | Reactor agitators, pump shafts | 316L withstands 15% H₂SO₄ at 50°C (122°F). |
| Oil & Gas | Downhole tool components, valve bodies | Duplex 2205 resists H₂S/CO₂ corrosion at 200°C (392°F). |
Stainless Steel Round Bar Product Packaging
Our Stainless Steel Coils (Grades 304/316L, ASTM A240/ASME SA-240 compliant) are engineered for critical applications in automotive, food processing, and architectural cladding. Combining superior corrosion resistance, hygienic surfaces, and high formability, these coils are protected by industry-leading packaging and logistics protocols compliant with ASTM A480, ISO 9444, and MIL-STD-129 standards to ensure flawless surface quality and dimensional stability during global transit.
Small Bars (<50mm)
Bundled with steel straps + VCI-coated wraps, crated on reinforced wooden pallets.
Large Bars (≥50mm)
End caps + edge protectors, stacked in custom steel racks with desiccant units.
Anti-Scratch Sleeving
Silicone-impregnated fabric for polished/ground surfaces.
RFID Tags
Embedded tracking chips with real-time material certification access.
Stainless Steel Round Bar Shipping
Sea transport
40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)
Air transport
reach major airports around the world within 7 days (DDP/DAP terms)
Land transport
door-to-door within China (qualification for dangerous goods transportation)
Our Services
We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.
Why Choose Us?
Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。
Full specifications and customization
Unlimited size, support non-standard cutting. Multiple surface treatments.
Professional capabilities
25 Years Of Focus On Metal Materials Science
Certification & Quality Assurance
Products comply with international standards such as ASTM, EN, JIS, etc., and are 100% tested from raw materials to finished products
Fast delivery & global supply
Global urgent orders are delivered within 15 days. One-stop service
FAQ
Q1: How does 316L differ from 304 stainless steel bars?
A: 316L adds 2–3% molybdenum for superior chloride resistance (ideal for marine/chemical use), while 304 is cost-effective for general applications.
Q2: What machining parameters prevent work hardening?
A: Use carbide tools with cutting speeds ≤100 m/min and coolant flow ≥5 L/min for Grades 304/316L.
Q3: Are bars certified for pharmaceutical equipment?
Full compliance includes:
- FDA 21 CFR 177.2600
- EU 10/2011
- ISO 13485 (Medical Devices)
Q4: What’s the minimum order quantity (MOQ)?
Standard stock: 1 ton MOQ.
Custom sizes/tempers: 5 tons MOQ (lead time 35 days).
Q5: How to verify material authenticity?
Scan QR codes or input heat numbers via our StainlessTrace® portal to access:
- XRF alloy verification reports
- EN 10204 3.1/3.2 certificates
- Third-party SGS/BV test data
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