Steel Flat Bar Manufacturer & Supplier – Sino East Steel Group
Sino East Steel Group has manufactured and exported steel flat bars from our production base in Tianjin, China, since 2008. As a factory-direct supplier, we sell mild steel flat bars, stainless steel flat bars, and galvanized flat bars straight from our own rolling and processing lines, with no middlemen and no added margins. Our export team has delivered flat bar steel to buyers in more than 80 countries across Asia, Africa, Europe, the Middle East, and the Americas. For stock sizes we offer a low minimum order quantity of just 5 tons, custom production starts at 20 tons, and standard delivery takes 15–30 days from Tianjin Xingang Port.
Flat bars are among the most versatile steel profiles used in construction and manufacturing. Our flat bar is produced through hot rolling, cold drawing, or hot-dip galvanizing depending on the application, with widths from 10 mm to 200 mm and thicknesses from 3 mm to 60 mm, in standard 6 m and 12 m lengths. Our annual production capacity for flat bars and related sections exceeds 100,000 tons, and every batch is traceable from raw billet to finished bundle. Whether you need ASTM A36 for structural fabrication, SS400 for general engineering, Q235 for building work, or Q345 for higher-strength frames, we supply consistent, certified material at wholesale factory prices.
Why Choose Sino East Steel Group as Your Steel Flat Bar Supplier?
Buyers around the world choose Sino East Steel Group as their steel flat bar supplier for one simple reason: we combine mill-level pricing with export-grade service. We have been selling steel to international markets since our founding in 2008, and that experience shows in every quotation, every shipment, and every certificate we issue. Here is what you can expect on every order, large or small.
1. Factory-Direct Manufacturing, No Middlemen
We own and operate the rolling and processing lines that produce your flat bars. There is no trading company in the middle, which means you pay the factory price and deal directly with the people who control quality and lead times. Every inquiry is answered by our in-house export team, and every order is scheduled on our own production plan, so you always know exactly where your material stands. When you buy from Sino East Steel Group, you are buying straight from the source.
2. Full International Standards Compliance
All our flat bars are manufactured and tested to internationally recognized standards, including ASTM A36, SS400 under JIS G3101, Q235 and Q345 under GB/T 700 and GB/T 1591, and EN 10025 structural grades. Mechanical properties, chemical composition, and dimensional tolerances are verified against the applicable standard before release. We provide mill test certificates in EN 10204 3.1 format, and we can arrange third-party inspection reports with complete heat-number traceability for every bundle we ship.
3. Stable Quality with Multi-Step Inspection
Quality control starts with incoming billet inspection and continues through hot rolling, straightening, shearing, and final surface inspection. Dimensional checks are performed with calibrated gauges at regular intervals along the line, and our laboratory verifies tensile strength, yield strength, elongation, and chemical composition for every production lot. This multi-step inspection process keeps our customer-arrival rejection rate below 0.5 percent, and every order is backed by our written quality guarantee.
4. Flexible Supply for All Project Scales
From a 5-ton stock order for a small workshop to a 2,000-ton shipment for a national infrastructure project, we scale with you. Our stock program covers the most popular sizes for immediate dispatch, while custom sizes, longer lengths, and special edge conditions are produced to order. You can choose bundled or loose packing, plain or painted surfaces, sharp or rounded edges, and optional end protection, so the material arrives ready for your fabrication line.
Steel Flat Bar Product Range
Our steel flat bar range covers three main material families, each available in a wide matrix of widths, thicknesses, and lengths. Tell us your drawing or application and we will confirm the most economical grade, surface finish, and edge condition for your project.
Mild Steel Flat Bar
Mild steel flat bar is the workhorse of general fabrication, made from low-carbon steel with excellent weldability, formability, and machinability. It is supplied in grades A36, SS400, Q235, and Q345, with sharp or rounded edges, in widths from 10 mm to 200 mm and thicknesses from 3 mm to 60 mm. Standard lengths are 6 m and 12 m, with cut-to-length service available for larger orders. Mild steel flat bar is the ideal choice for brackets, frames, stairs, gratings, anchors, and thousands of everyday fabrication applications.
Stainless Steel Flat Bar (304/316)
Stainless steel flat bar in grades 304 and 316 delivers long-term corrosion resistance for marine, chemical, food processing, and architectural applications. We supply both hot-rolled and cold-drawn stainless flat bars with pickled, bright, or polished surface finishes. Grade 304 suits most general corrosive environments, while grade 316 provides superior resistance to chlorides and seawater for coastal and offshore projects. Every stainless bar is supplied with full material certification, and surface quality is checked bar by bar before packing.
Galvanized Flat Bar
Galvanized flat bar is pre-coated with a hot-dip zinc layer, typically 40–85 g/m² or per your specified coating weight, providing long-term corrosion protection for outdoor and humid applications. It saves your project time and cost because no post-treatment is needed after cutting and installation. We offer both hot-dip galvanized and electro-galvanized options across the same dimensional range as our mild steel bars, and zinc-coated cut edges are factory dressed for a clean, professional finish.
Steel Flat Bar Specifications
The table below summarizes the standard size range and specifications for our steel flat bars. Custom sections outside this matrix can be produced subject to rolling program confirmation, so please contact us with your exact requirement.
| Parameter | Available Range |
|---|---|
| Material Grade | A36 / SS400 / Q235 / Q345 / S235JR |
| Width | 10 – 200 mm |
| Thickness | 3 – 60 mm |
| Length | 6 m / 12 m (cut-to-length available) |
| Edge Condition | Sharp edge / Rounded edge |
| Standards | ASTM A36 / JIS G3101 / GB/T 700, GB/T 1591 / EN 10025 |
| Surface Finish | Black / Bright / Galvanized / Painted |
| Tolerance | Standard rolling tolerance per applicable standard |
| Packing | Hexagonal bundles with steel straps |
| Certification | Mill test certificate, EN 10204 3.1, third-party inspection |
Flat Bar Dimension and Weight Reference Table
Theoretical weight is calculated as width × thickness × 0.00785 kg/m, based on a steel density of 7.85 g/cm³. Actual bundle weights may vary slightly with rolling tolerances; invoicing is based on weighbridge weight at loading.
| Section (Width × Thickness) | Theoretical Weight (kg/m) |
|---|---|
| 25 × 3 mm | 0.59 |
| 40 × 4 mm | 1.26 |
| 50 × 5 mm | 1.96 |
| 60 × 6 mm | 2.83 |
| 75 × 8 mm | 4.71 |
| 100 × 10 mm | 7.85 |
| 120 × 12 mm | 11.30 |
| 150 × 20 mm | 23.55 |
| 200 × 30 mm | 47.10 |
Typical Applications of Steel Flat Bar
Steel flat bars are found in almost every sector of construction, fabrication, and manufacturing. Typical applications include:
- Structural fabrication, including brackets, gussets, stiffeners, and frame members
- Stair stringers, ladder rungs, walkway supports, and handrail sub-structures
- Grating and platform support bars in industrial flooring
- Anchors, tie bars, and dowels in concrete construction
- Machine bases, jigs, and general workshop fixtures
- Gates, fences, doors, and architectural metalwork
- Shipbuilding and offshore fit-out components
- Trailers, agricultural equipment, and transport frames
Flat Bar Quality You Can See and Measure
Every production step at our Tianjin plant is designed around one goal: flat bar that arrives ready to weld, cut, drill, and install without surprises. Rolling temperatures are controlled to hold a consistent cross-section, straightening machines remove residual bow and twist, and shearing lines cut clean, square ends. Our surface inspection rejects bars with laminations, cracks, scale pits, or edge damage before they reach the packing area. The result is a product that feeds smoothly into your production line, reduces rework, and gives your customers the finished appearance they expect. We are confident enough in this quality system to put it in writing on every contract, and we invite new buyers to request a pre-production sample or a factory audit before placing their first order.
How We Ensure Reliable Export Service
Exporting steel for nearly three decades has taught us that a good price is only half of the job. The other half is making sure the material arrives on time, documented correctly, and in the promised condition. Here is how we protect your shipment at every stage.
Export Experience Across 80+ Countries
Our export team ships flat bars to more than 80 countries every year, from nearby markets in Southeast Asia and the Middle East to long-distance destinations in Africa, Europe, and South America. We understand regional documentation requirements, port handling practices, and packing preferences, and we apply that experience to every shipment, whether it is a single 20-foot container, a 40-foot high cube, or a full bulk vessel.
Professional Export Documentation
Each shipment is supported by a complete documentation package: commercial invoice, packing list, bill of lading, certificate of origin, and mill test certificates, plus any additional documents requested by your customs authority. For project work we can arrange SGS, BV, or TÜV third-party inspection before loading, and we provide loading supervision reports with photographs and weighbridge tickets so you can verify exactly what left the port.
Flexible Payment and Incoterms
We accept T/T with a 30 percent deposit and 70 percent balance against a copy of the shipping documents, or L/C at sight for larger orders. A full range of Incoterms is available, including FOB Tianjin, CIF, CFR, and DDP, and we are happy to quote door-to-door delivery for projects that need it. Our standard loading port is Tianjin Xingang, one of China’s largest and most efficient steel export hubs.
Pricing, MOQ & Delivery
Below is a practical summary of how we price and schedule steel flat bar orders. Final quotations depend on grade, size, quantity, surface treatment, and current raw material prices, so please send us your exact specification for a firm price.
- Price range: USD 520–950 per ton FOB Tianjin, depending on grade, size, and finish
- MOQ: 5 tons for stock sizes; 20 tons for custom or cut-to-length production
- Payment: T/T 30% deposit plus 70% against shipping documents, or L/C at sight
- Delivery: 15–30 days after deposit confirmation, depending on size and quantity
- Packing: hexagonal bundles with steel straps, waterproof inner wrapping for ocean freight
Buyer’s Guide: How to Choose a Reliable Steel Flat Bar Supplier
Choosing the right flat bar steel supplier protects both your budget and your delivery schedule. Start by verifying that the supplier can provide mill test certificates with heat numbers that match the actual material, because traceability is the only real proof of grade. Check dimensional tolerances against the applicable standard, and for galvanized bars confirm the zinc coating weight rather than accepting a generic claim of galvanizing. Compare landed cost, including freight and any import duties, instead of unit price alone. Ask for a pre-production sample or a third-party inspection clause, and confirm the supplier’s commitment to lead times in writing. Finally, prefer a factory like Sino East Steel Group that you can audit in person or online, because a direct mill relationship eliminates the risk of substitution and miscommunication that often comes with trading intermediaries.
How to Get a Quotation
Getting a firm quotation from Sino East Steel Group takes minutes, not days. Send us your required grade, width, thickness, length, quantity, and destination port, and our export team will reply within 24 hours with a detailed offer including unit price, delivery time, and packing proposal. If you are not sure which grade or finish to choose, describe your application and we will recommend the most cost-effective option. You can reach us through the contact form on this page, by email, or directly by phone and WhatsApp, and our engineers are available to answer technical questions in English and Chinese.
Frequently Asked Questions (FAQ)
Q1: What is the difference between mild steel and stainless steel flat bar?
Mild steel flat bar is a low-carbon carbon steel product that is strong, weldable, and affordable, but it will rust when exposed to moisture unless painted, oiled, or galvanized. Stainless steel flat bar contains chromium and nickel, which gives it long-term corrosion resistance without any coating. Choose mild steel for general structural and fabrication work where cost matters, and choose stainless steel grades 304 or 316 for marine, chemical, food, or architectural applications where rust cannot be tolerated.
Q2: Can you supply flat bars in custom lengths or cut pieces?
Yes. Standard lengths are 6 m and 12 m, and we regularly supply cut-to-length pieces for buyers who need specific sizes for their production line. Custom cutting is available for orders of 20 tons or more, and we can also supply drilled, slotted, or painted bars on request. Tell us your cutting list and we will confirm the most economical way to produce and pack it.
Q3: What is your minimum order quantity for flat bars?
Our minimum order is 5 tons for stock sizes, which can be dispatched within days of payment confirmation. Custom production, including non-standard dimensions and special surface treatments, starts at 20 tons. If your requirement is smaller than 5 tons, contact us anyway, because we sometimes combine small orders with regular production runs to help new buyers get started.
Q4: How do you pack flat bars for sea freight?
Flat bars are packed in hexagonal bundles with steel straps for stability and easy forklift handling. Each bundle is marked with size, grade, heat number, and bundle weight, and bundles are wrapped with waterproof material for ocean voyages to protect the surface from humidity and salt air. Loose packing, wooden pallets, or container dunnage arrangements are available on request.
Q5: What certificates do you provide with each shipment?
Every shipment includes a commercial invoice, packing list, bill of lading, certificate of origin, and mill test certificates showing chemical composition and mechanical properties. If your project requires EN 10204 3.1 certification or inspection by SGS, BV, or TÜV, we can arrange it at cost. We can also provide a loading report with photographs and weighbridge tickets.
Q6: How long does production and delivery take?
Stock sizes are usually loaded within 3–5 days after payment, and total delivery time to your port depends on the shipping route, typically 15–30 days overall. Custom production takes longer because it must be scheduled into the rolling program, so we always confirm a realistic production window at quotation stage and keep you updated with loading photos.
Contact Sino East Steel Group today – request your flat bar quotation and experience factory-direct pricing, certified quality, and 30 years of export reliability. Our team is ready to help you source the right steel flat bars for your next project.