ASTM 304L/316L/321 Stainless Steel Round Bars - 300 Series Industrial Black Bars Supplier | Bulk Pricing & Specifications

Core Specifications
✅ ASTM-Certified 300 Series: Precision-engineered 304L (UNS S30403), 316L (UNS S31603), 321 (UNS S32100) grades with ≤0.03% carbon content for enhanced intergranular corrosion resistance.

✅ Industrial-Grade Durability: 16-18% chromium & 8-12% nickel composition ensures Pitting Resistance Equivalent Number (PREN) >23, suitable for chemical plants/marine environments.

✅ Surface Options:
・Black Oxide Coated Bars (ISO 11408 standard)
・#4 Brushed / Mirror Polished Finishes
・Custom Coatings Available

B2B Value Proposition

🔧 On-Demand Metalworking Services
・Precision Cutting (Laser/Waterjet/CNC)
・Cold Bending (Radius ≥2.5x Diameter)
・TIG Welding (AWS D1.6 Certified)
・Decoiling & Flattening (Thickness 0.3-12mm)

📦 Global Logistics Assurance
・15-21 Day Standard Lead Time (Ex-Works)
・FCA/FOB/CIF Terms Available
・40HQ Container Loading Optimization

💳 Flexible Procurement
・MOQ: 500kg (Small Batch Trials Accepted)
・Payment: LC at Sight / TT / Western Union
・Material Certificates: EN 10204 3.1 Mill Test Reports