QIDAMT
Product Overview
Our Stainless Steel Round Bar (also known as stainless steel round rod or solid shaft) is manufactured from premium stainless steel billets through hot rolling, cold drawing, peeling, or precision grinding processes. With excellent corrosion resistance, high strength, and smooth surface finish, stainless round bars are widely used in shafts, fasteners, machinery components, construction, and general engineering. We supply a comprehensive range of stainless steel round bars in 304, 304L, 316, 316L, 321, 310S, 410, 420, 430, 17-4PH, and duplex grades, with custom diameters and surface finishes available.
Specifications
Steel Grades: 304, 304L, 303, 316, 316L, 316Ti, 321, 310S, 410, 420, 430, 431, 17-4PH (630), 17-7PH (631), 2205, 2507
Standard: ASTM A276, ASTM A484, ASTM A582, GB/T 1220, GB/T 4226, DIN 1.4301/1.4401/1.4057, JIS G4303, EN 10088
Diameter: 3 mm – 500 mm (1/8″ – 20″)
Length: 2m, 2.5m, 3m, 5.8m, 6m, or as per customer request (SRL, DRL)
Process: Hot Rolled (HR), Cold Drawn (CD), Peeled, Ground & Polished, Turned, Forged
Surface Finish: Black (hot rolled), Bright (cold drawn), Peeled, Ground (h8/h9/h10), Polished, Turned
Tolerance: h8/h9/h10 (ground), h11 (cold drawn), ±0.5mm (hot rolled)
Condition: Annealed, Solution Annealed, Quenched & Tempered (for martensitic and precipitation hardening grades)
Application: Shafts, valves, pumps, fasteners, fittings, machinery components, construction
Key Features & Advantages
- Excellent corrosion resistance – 304/316 grades resist rust, acids, and harsh environments
- High strength and hardness – ideal for shafts, gears, and load-bearing components
- Precision dimensions – ground bars with h8/h9 tolerance for direct machining
- Superior surface finish – bright, peeled, or polished surfaces for aesthetic applications
- Wide diameter range – from 3mm precision rods to 500mm forged shafts
- Multiple grades available – austenitic, martensitic, ferritic, PH, and duplex grades
- Excellent machinability – 303 grade for free machining, 416 for improved machinability
- Full traceability – mill test certificates with heat number, chemical composition, and mechanical properties
Applications
- Machinery shafts and axles
- Fastener manufacturing – bolts, nuts, screws, studs
- Valve and pump components
- Automotive and transportation parts
- Construction and structural supports
- Chemical and petrochemical equipment
- Marine and offshore applications (316L grade)
- Food processing and pharmaceutical equipment
- Medical instruments and devices
- General engineering and fabrication
Quality Control & Testing
Every batch of stainless steel round bars undergoes rigorous quality control:
Raw Material: Chemical composition analysis (spectrometer), PMI testing, heat number verification
Process Control: In-line dimensional monitoring, surface inspection, temperature control
Finished Product: Dimensional verification (micrometer, caliper), surface finish inspection, hardness test (Rockwell/Brinell/Vickers), tensile test (yield strength, tensile strength, elongation), impact test (Charpy V-notch), ultrasonic testing (UT) for internal defects, eddy current testing (ET) for surface defects
Documentation: Mill Test Certificate (MTC) per EN 10204 3.1, material traceability, conformity certificate
Packaging & Shipping
Packaging: Standard export packaging – bundles tied with stainless steel strips, hexagonal bundles, wooden pallets or crates, waterproof paper wrapping, PVC caps for end protection, individual wrapping for bright/ground bars
Marking: Steel grade, size, heat number, standard, manufacturer logo (painted or labeled)
Trade Terms: FOB, CIF, CFR, EXW, DDP
Payment: T/T (30% deposit, 70% before shipment), L/C at sight, Western Union, PayPal (sample orders)
Lead Time: Standard sizes in stock – 3-7 days; Custom sizes – 15-25 days
MOQ: 500 kg for standard sizes; custom orders negotiable
Loading Port: Qingdao, Shanghai, Tianjin, Ningbo, or as requested
Why Choose Us
As a professional stainless steel manufacturer and exporter with over 15 years of experience, we supply high-quality stainless steel round bars to customers in more than 60 countries. Our factory is equipped with advanced rolling, drawing, peeling, and grinding lines, ensuring precise dimensions and consistent surface quality. We maintain large inventory of standard sizes for immediate delivery, and our experienced team can provide technical consultation and customized solutions for your specific applications. Contact us today for a competitive quote!
