316 Stainless Steel Round Bar | Marine-Grade Corrosion Resistance for Demanding Applications
✓ Chloride Dominance: PREN ≥28, validated by 2,000+ hours in ASTM G48 salt spray testing.
✓ Acid Resistance: Withstands 10% sulfuric acid at 50°C (122°F) – 2x lifespan vs 304 stainless steel.
✓ High-Temperature Stability: Maintains strength up to 800°C (1,472°F) with minimal scaling.
✓ Precision Machinability: HB ≤95 hardness enables tight-tolerance turning, milling, and threading (±0.02mm).
316 Stainless Steel Round Bar (UNS S31600)
Engineered to excel in chloride-rich and acidic environments, 316 stainless steel round bars combine 18% chromium, 10% nickel, and 2-3% molybdenum to deliver superior resistance to pitting, crevice corrosion, and stress corrosion cracking. Certified to ASTM A276/A479 and NACE MR0175, this molybdenum-enhanced austenitic alloy is the go-to choice for marine hardware, chemical processing equipment, and medical devices where standard grades fail.
Diameter Range: 5mm–300mm (hot-rolled ±0.5%; cold-drawn ±0.05mm)
Length: 2m–6m standard (cut-to-length precision ±1mm)
Surface Finishes: Black, Peeled, Polished (Ra ≤0.6μm), or Ground (Ra ≤0.3μm)
Mechanical Properties: Yield Strength ≥205 MPa | Tensile Strength ≥515 MPa | Elongation ≥40%
| Parameter Category | Value/Description |
|---|---|
| Material Grade | UNS S31600 (per ASTM A276) |
| Composition (%) | C≤0.08, Cr 16.0-18.0, Ni 10.0-14.0, Mo 2.0-3.0, Mn≤2.0, Si≤1.0, P≤0.045, S≤0.03 |
| Tensile Strength (MPa) | ≥515 (Annealed) |
| Yield Strength (MPa) | ≥205 (Annealed) |
| Elongation (%) | ≥40 (50mm gauge length) |
| Hardness | Brinell (HB): ≤217; Rockwell (HRB): ≤95 (Annealed) |
| Density (g/cm³) | 8.03 |
| Melting Range | 1375-1400℃ |
| Thermal Conductivity (W/m·K) | 16.3 (20℃) |
| Thermal Expansion (10⁻⁶/℃) | 16.0 (20-100℃) |
| Electrical Resistivity (Ω·m) | 0.74×10⁻⁶ (20℃) |
| Elastic Modulus (GPa) | 193 |
| Magnetic Properties | Non-magnetic (Annealed) |
| Corrosion Resistance | Excellent resistance to chlorides (e.g., seawater), sulfuric acid, phosphoric acid, and organic acids; superior pitting/crevice corrosion resistance (PREN≥26) |
| Heat Treatment | Annealing: 1010-1150℃ followed by rapid cooling (water or air quenching) |
| Surface Finishes | Black (Hot-rolled), Turned, Polished, Pickling & Passivation |
| Dimension Range | Diameter: 5mm-300mm; Length: 3000mm/6000mm (standard) |
| Standards | ASTM A276/A479, EN 10088-3, JIS G4303, GB/T 1220 |
| Applications | Marine components, chemical pumps/valves, medical instruments, seawater pipelines, high-temperature fasteners, food processing equipment |
316 Stainless Steel Round Bar Applications
| Industry | Critical Components | 316 Round Bar Advantage |
|---|---|---|
| Marine Engineering | Seawater pump shafts, boat propellers | Resists barnacle-induced pitting in 30,000ppm chloride environments. |
| Chemical Plants | Acid storage tank agitators, valve stems | 0.02mm/year corrosion rate in 50% acetic acid. |
| Medical Devices | Surgical instruments, implantable screws | Complies with ASTM F138 for medical-grade biocompatibility. |
| Coastal Architecture | Boardwalk bolts, seaside railings | Survives 25+ years in salt spray zones (ISO 9223). |
316 Stainless Steel Round Bar Product Packaging
316 Stainless Steel Round Bar are precision-engineered for superior corrosion resistance and mechanical strength, meeting ASTM A276 and ISO 3506 standards. To ensure optimal performance from factory to your facility, we implement rigorous packaging protocols and logistics safeguards.
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.
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 specification coverage & flexible customization
Unlimited size: thickness 0.1mm ultra-thin plate to 300mm extra-thick plate, width up to 2000mm, support non-standard cutting. Various surface treatments: 2B, BA mirror, brushed (No.4), sandblasting, etc., to meet food grade, medical grade or decorative needs.
Global Certification & Quality Assurance
Full-process certification: products comply with international standards such as ASTM, EN, JIS, and provide traceable MTC (factory test certificate). Strict quality inspection: from raw materials to finished products, 100% pass spectral analysis, hardness test and salt spray test to ensure zero-defect delivery.
Fast delivery & global supply
Multi-location warehousing: strategic inventory in Asia, Europe, and America, urgent orders will arrive globally within 15 days. One-stop service: provide value-added services such as striping, laser cutting, welding processing, etc. to shorten customer production cycle.
Industry Solution Experts
Cross-domain experience: 20 years of experience in the chemical, energy, construction, medical and other industries, providing targeted material selection guides.
Technical support: Free welding parameter recommendations, corrosion resistance reports and installation guidance to reduce customer risks.
Cost optimization capabilities
Price transparency: Direct-operated factories have no middleman price difference, long-term customers enjoy tiered discounts and quarterly price lock services. Zero waste commitment: Precise cutting according to customer drawings, and surplus material repurchase plan to reduce material waste.
Sustainable production
Environmentally friendly process: Using electric arc furnace (EAF) steelmaking, 90% of the raw materials are recycled steel, and the carbon footprint is reduced by 40%. Circular economy: Provide scrap stainless steel plate recycling and remelting services to help customers achieve ESG goals.
316 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.
FAQ
Q1: How does 316 differ from 316L stainless steel bars?
A; 316L (0.03% max carbon) prevents sensitization in welded thick sections (>8mm). Use 316 for non-welded or high-strength applications.
Q2: What surface finish reduces biofouling in seawater?
A: Electropolished (Ra ≤0.5μm) or PTFE-coated bars reduce biofilm adhesion by 80% vs machined finishes.
Q3: Are bars compliant with offshore oil & gas standards?
Yes, all bars include:
- NACE MR0175/ISO 15156-3 certification
- DNVGL-OS-B101 marine compliance
- 3.2 Material Traceability Report
Q4: What’s the MOQ for custom diameters?
Standard sizes: 5 ton.
Custom diameters: 10 tons (lead time 30 days).
Q5: How to address surface scratches during transit?
A: Use our ScratchShield™ packaging – self-healing polymer film reduces visible defects by 95%.
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