Stainless steel flat bars are essential rectangular solid profiles widely used in manufacturing, construction, and fabrication industries. As a leading stainless steel manufacturer, we produce high-quality flat bars through precision hot rolling and cold finishing processes in our advanced factory. Our production capabilities ensure consistent thickness, exact width tolerances, and superior surface quality, making them the preferred choice for components requiring both strength and precision. The core advantages of our flat bar products include:
(1) Precision Dimensions: Consistent thickness and width with sharp edges or radius corners as required.
(2) Exceptional Corrosion Resistance: Withstands harsh environments for long-lasting performance.
(3) Superior Flatness: Excellent surface flatness for machining and fabrication applications.
(4) Versatile Applications: Suitable for supports, frames, clamps, and decorative trims across multiple industries.
| Product Name | Stainless Steel Flat Bar |
|---|---|
| Grade | 201, 202, 301, 304, 304L, 309S, 310S, 316, 316L, 317L, 321, 347, 410, 420, 430, 904L, Duplex 2205 |
| Standard | ASTM A276, ASTM A484, EN 10058, JIS G4303, GB/T 702, DIN 1017 |
| Size Range | Thickness: 3mm - 100mm |
| Width: 10mm - 300mm | |
| Length | 1000mm - 12000mm or as required |
| Edge Type | Mill edge, slit edge, deburred edge, rounded edge |
| Surface | Black (Hot Rolled/Pickled), Bright (Cold Drawn), Polished, Ground |
| Technique | Hot Rolled, Cold Drawn, Precision Ground |
| Tolerance | ASTM A484, h9/h10/h11 for cold drawn, or as required |
| Straightness | ≤ 2mm/meter (standard), ≤ 1mm/meter (precision) |
| Application | Machine parts, structural supports, brackets, frames, spacers, keys, flanges, architectural trims, handrails, gates, door frames, kitchen equipment, food processing components, chemical equipment supports, marine hardware, and general fabrication |
| MOQ | 1 ton (Sample orders accepted) |
| Shipment Time | Within 15-25 workdays after receiving deposit or L/C |
| Export Packing | Steel bundles with straps, waterproof paper, wooden crates for polished surfaces, standard export seaworthy packing |
| Capacity | 10,000+ tons/year (specific to flat bar production) |
| Price Term | EXW, FOB, CFR, CIF, as required |
| Port | Shanghai / Ningbo / Tianjin / Any major Chinese port |
| Payment | T/T, L/C, Western Union, PayPal |
Overview
Stainless Steel Flat Bars represent the perfect balance of form and function in the world of long products. As a dedicated stainless steel manufacturer, we produce these versatile rectangular profiles in our state-of-the-art factory using advanced rolling mills and precision finishing lines. Our production process ensures consistent metallurgical properties, tight dimensional tolerances, and superior surface quality across all sizes and grades. Whether for structural support, machine components, or architectural accents, our flat bars deliver the reliability and performance that modern industry demands.
Key Features & Advantages
Integrated Manufacturing Excellence
As an integrated manufacturer, our factory maintains complete control over the entire production chain. We source high-quality stainless steel billets and coils from our partner mills, process them through our precision rolling and drawing lines, and conduct rigorous quality inspections at every stage. This vertical integration ensures that our flat bars consistently meet international standards and client specifications .
Precision Dimensional Control
Our advanced production equipment delivers flat bars with exceptional dimensional accuracy:
Uniform Thickness: Consistent cross-section throughout the entire length
Precise Width: Tight width tolerances for easy fitting and fabrication
Superior Flatness: Advanced leveling ensures bars meet tight flatness specifications
Edge Options: Mill edge, slit edge, deburred edge, or rounded edge based on application requirements
Corner Configuration: Sharp 90° corners or radius corners as specified
Comprehensive Grade Selection
We produce flat bars in a wide range of stainless steel grades to suit diverse environmental and mechanical requirements:
| Grade Family | Typical Grades | Key Characteristics | Common Applications |
|---|---|---|---|
| Austenitic | 304/304L, 316/316L | Excellent corrosion resistance, good formability, non-magnetic | General fabrication, food equipment, marine hardware, chemical processing |
| Duplex | 2205, 2507 | High strength, excellent corrosion resistance | Offshore platforms, chemical tanks, structural components |
| Ferritic | 430 | Good corrosion resistance, magnetic, cost-effective | Decorative trims, automotive trim, indoor applications |
| Martensitic | 410, 420 | High hardness, wear-resistant | Cutting tools, valves, shafts, wear plates |
| Heat-Resistant | 309S, 310S | Excellent oxidation resistance at high temperatures | Furnace parts, heat exchangers, kiln components |
Superior Surface Finishes
Our production capabilities include multiple surface options to match your specific requirements:
No.1 Finish: Hot rolled, annealed, and pickled surface for general industrial use
2B Finish: Smooth, cold-rolled appearance for visible applications
Bright Finish: Cold drawn surface with improved dimensional accuracy
Polished Finish: Decorative surface for architectural and aesthetic installations (No.4, HL, 8K available)
Ground Finish: Precision ground surfaces for critical tolerance applications
Pickled Surface: Clean, scale-free finish ready for fabrication
Superior Mechanical Properties
Through precise control of chemistry and heat treatment, we deliver flat bars with optimized mechanical characteristics:
High Tensile Strength: Suitable for load-bearing structural applications
Excellent Yield Strength: Ensures stability under dynamic loads
Good Ductility: Allows for bending, forming, and welding without cracking
Consistent Hardness: Uniform properties throughout each bar for predictable machining
Controlled Grain Structure: Optimized for specific fabrication processes
Corrosion Resistance for Challenging Environments
Our stainless steel flat bars are engineered to withstand demanding conditions:
Marine Environments: 316L and Duplex grades offer exceptional resistance to chloride attack
Industrial Atmospheres: Standard 304 grade resists chemical exposure and humidity
High-Temperature Applications: 310S grade maintains strength and oxidation resistance up to 1150°C
Food Processing: Non-toxic, easy-to-clean surfaces meet FDA and sanitary standards
Chemical Processing: Higher alloy grades resist aggressive media and acids
Industrial Applications
Stainless steel flat bars from our factory serve as essential components across numerous industries:
| Sector | Typical Applications |
|---|---|
| Construction & Architecture | Support brackets, curtain wall anchors, handrail sub-frames, expansion joints, door frames, window frames, decorative trims, signage supports, structural reinforcements |
| Industrial Manufacturing | Machine bases, equipment frames, conveyor guides, workbench supports, jigs and fixtures, assembly line components, mounting brackets, spacers and shims |
| Food & Beverage Processing | Equipment frames, sanitary supports, work surfaces, conveyor rails, cutting tables, mixing vessel supports, guide rails for packaging lines |
| Marine & Offshore | Shipbuilding components, dock supports, platform gratings, marine hardware, boat trailer components, offshore module structures |
| Chemical & Petrochemical | Equipment supports, pipe racks, platform structures, walkway supports, tank reinforcements, valve mounting brackets |
| Automotive & Transportation | Trailer frames, truck body reinforcements, rail carriage components, container corner reinforcements, vehicle floor supports |
| Mining & Heavy Industry | Screen frames, chute liners, wear plates, equipment guards, conveyor structure supports, crusher frames |
| Architectural Metalwork | Handrails, balustrades, gates, grilles, decorative screens, furniture frames, display fixtures, shelving systems |
| Electrical & Instrumentation | Control panel frames, equipment racks, mounting rails, busbar supports, cable tray supports |
| Medical & Pharmaceutical | Equipment frames, work surfaces, support stands, clean room fixtures, laboratory furniture |
Why Choose YIHO GROUP as Your Stainless Steel Flat Bar Supplier?
Global Manufacturing Leadership
With over two decades of experience, our factory has established itself as a premier stainless steel manufacturer serving clients across Asia, Europe, and the Americas. Our production facilities feature:
Advanced hot rolling mills with automated gauge control
Precision cold drawing lines for tight tolerance products
Centerless grinding and polishing equipment
In-house heat treatment furnaces with precise temperature control
Comprehensive testing laboratories with advanced analytical equipment
Rigorous Quality Assurance System
Every batch of flat bars undergoes thorough inspection to ensure compliance with international standards:
Chemical Analysis: Optical emission spectrometer verification of elemental composition
Mechanical Testing: Tensile, yield, and elongation testing per ASTM/EN standards
Hardness Testing: Brinell, Rockwell, or Vickers as required
Dimensional Inspection: Precision measurement of thickness, width, and straightness
Surface Examination: Visual and non-destructive testing for surface defects
Ultrasonic Testing: Optional internal integrity verification for critical applications
PMI Testing: Positive Material Identification verification upon request
Third-Party Certification: Options for SGS, BV, TÜV, or Lloyd's inspection
Customization Capabilities
We understand that every project has unique requirements. Our factory offers extensive customization:
Custom Dimensions: Non-standard thicknesses and widths for specific applications
Special Lengths: Cut-to-length service with precision sawing
Edge Conditioning: Deburred, rounded, or chamfered edges for safety and fit
Pre-drilling & Machining: Holes, slots, or custom machining per drawings
Special Packaging: Individual wrapping, color coding, or custom labeling
Mixed Loads: Combination of different sizes and grades in a single shipment
Technical Support & Metallurgical Expertise
Our team of metallurgists and application engineers provides comprehensive technical support:
Material selection guidance based on corrosion and mechanical requirements
Welding procedure recommendations for different grades
Fabrication advice for bending, forming, and machining
Heat treatment guidance for specific property requirements
Failure analysis and troubleshooting support
Sustainable Manufacturing Practices
As a responsible manufacturer, we are committed to environmental stewardship:
Energy-efficient production processes reducing carbon footprint
Closed-loop water cooling systems
100% recyclable stainless steel materials
Waste reduction and scrap recycling programs
Compliance with REACH, RoHS, and other environmental regulations
Production Process: From Raw Material to Finished Flat Bar
At our factory, the production of stainless steel flat bars follows a rigorous process to ensure consistent quality:
Raw Material Selection: High-quality stainless steel billets, slabs, or coils sourced from partner mills including POSCO, BAOSTEEL, and TISCO, with full traceability
Material Inspection: Chemical and physical verification before production release
Hot Rolling: Billets reheated to precise temperatures and passed through calibrated rolls to achieve near-net shape
Annealing: Heat treatment to restore corrosion resistance and improve formability
Pickling/Descaling: Removal of mill scale to reveal clean surface
Cold Drawing/Grinding (for precision products): Further processing to achieve tight tolerances and improved surface finish
Straightening: Precision roller straightening for superior flatness
Cut-to-Length: Shearing or sawing to specified lengths
Edge Finishing: Deburring, rounding, or chamfering as required
Surface Finishing: Polishing, grinding, or brushing for specific requirements
Final Inspection: Comprehensive dimensional and visual inspection
Marking & Identification: Grade, size, and heat number marking
Packaging: Protective packing for international transport
Documentation: Mill test reports and shipping documents
Quality Certifications
Our commitment to quality is validated by international certifications:
ISO 9001:2015 Quality Management System
ISO 14001:2015 Environmental Management System
PED 2014/68/EU for pressure equipment applications
AD 2000 Merkblatt W0 for German pressure equipment market
ASME Section II for boiler and pressure vessel applications
Lloyd's Register Type Approval for marine applications
DNV-GL certification for offshore applications
Korean Register (KR) and China Classification Society (CCS) approvals
Why Flat Bars? Advantages Over Other Profiles
Stainless steel flat bars offer unique advantages compared to other structural shapes:
Versatile Mounting Surfaces: The flat surface provides ideal mounting points for attaching other components
Efficient Stacking: Rectangular profile allows for compact storage and easy handling
Precision Spacing: Accurate thickness makes flat bars ideal for shims, spacers, and keys
Easy Fabrication: Simple geometry facilitates cutting, welding, drilling, and machining
Aesthetic Appeal: Clean lines suitable for visible architectural applications
Cost-Effective: Efficient manufacturing process results in competitive pricing
Design Flexibility: Available in numerous width-to-thickness ratios for specific strength requirements
Partner with YIHO GROUP
When you choose YIHO GROUP as your stainless steel flat bar supplier, you're partnering with a company that combines decades of experience with cutting-edge manufacturing technology. We don't just produce steel—we engineer solutions that meet the precise dimensional and performance requirements of your most challenging applications.
Contact us today to discuss your stainless steel flat bar requirements. Whether you need standard sizes for immediate delivery, custom dimensions for specialized applications, or value-added services like pre-machining and surface finishing, our team is ready to provide competitive pricing, technical expertise, and reliable delivery.
FAQ: Stainless Steel Flat Bars
Q: What is the difference between hot rolled and cold drawn flat bars?
A: Hot rolled flat bars are produced by rolling heated billets through calibrated rolls, resulting in standard tolerances and a mill scale surface. Cold drawn flat bars are produced by pulling hot rolled bars through a die at room temperature, resulting in tighter dimensional tolerances (h9/h10), improved surface finish, and slightly increased mechanical strength due to work hardening.
Q: What edge options are available for flat bars?
A: We offer several edge options including mill edge (as rolled, slightly rounded), slit edge (sheared, sharp), deburred edge (sheared with sharp corners removed), and rounded edge (fully radiused corners). The choice depends on your safety requirements and application needs.
Q: Can you supply flat bars with polished surfaces?
A: Yes, we offer various polishing finishes including No.4 (brushed finish), HL (hairline), and 8K (mirror finish). Please specify your surface finish requirements when ordering.
Q: What is the standard tolerance for stainless steel flat bars?
A: Tolerances vary by production method and standard. Hot rolled flat bars typically follow ASTM A484 tolerances, while cold drawn bars can achieve h9, h10, or h11 tolerances. Precision ground bars can achieve even tighter tolerances. Please consult our technical team for specific requirements.
Q: How do I choose between 304 and 316 grades for my application?
A: Grade 304 is suitable for general indoor applications, mild outdoor environments, and food processing. Grade 316 offers superior corrosion resistance, particularly against chlorides and salt water, making it ideal for marine environments, chemical processing, and coastal architectural applications. For harsh chemical environments, consider duplex or higher alloy grades.
Q: Do you offer cut-to-length service?
A: Yes, we provide precision cut-to-length service to meet your exact requirements. Please specify your required lengths when ordering.
Q: What documentation is provided with shipments?
A: Each shipment includes comprehensive Mill Test Reports (MTRs) certifying chemical composition, mechanical properties, and heat treatment details. Additional documentation including third-party inspection reports, country of origin certificates, and commercial invoices are provided as required.
Q: Can you supply flat bars for just-in-time (JIT) delivery programs?
A: Yes, we work with clients to establish supply agreements that support JIT manufacturing requirements. Please contact our sales team to discuss your specific delivery scheduling needs.
Q: What is the maximum length you can produce?
A: Our standard production capability extends to 12 meters. For longer lengths, please consult with our sales team to discuss special arrangements.
Q: Are your flat bars suitable for welding?
A: Yes, all our austenitic grades (304, 316, etc.) offer excellent weldability. Ferritic and martensitic grades require special welding procedures. Our technical team can provide welding recommendations based on your specific grade and application.
