English 
Español 
Français 
Deutsch 
Português (Brasil) 
Русский 
العربية 
Steel Flat Bar Manufacturer - Mill Direct Factory Price |
China
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
Product details
Technical Specifications of Steel Flat Bar Manufacturer
| Property | Parameter | Description |
|---|---|---|
| Product Name | Steel Flat Bar | Hot rolled / cold drawn flat steel bar for structural and industrial use |
| Material Grade | A36, Q235B, S235JR, SS400, 1018, 1045, 4140 | Carbon steel, alloy steel; equivalent grades per ASTM / EN / JIS / GB standards |
| Standard Compliance | ASTM A36, EN 10025-2, JIS G3101, GB/T 702 | Meets international structural and engineering steel standards |
| Chemical Composition – C | 0.15% – 0.29% max | Carbon content varies by grade; controls hardness and weldability |
| Chemical Composition – Mn | 0.60% – 1.65% max | Manganese improves tensile strength and toughness |
| Chemical Composition – P / S | P ≤ 0.040%, S ≤ 0.050% | Controlled impurity levels per ASTM A36 / EN 10025-2 requirements |
| Chemical Composition – Si | 0.10% – 0.40% | Silicon acts as deoxidizer; present in structural and alloy grades |
| Tensile Strength | 400 – 550 MPa (58 – 80 ksi) | Per ASTM A36 / EN 10025-2 S235JR; higher values for alloy grades (4140: ≥655 MPa) |
| Yield Strength | 235 – 415 MPa (34 – 60 ksi) | Minimum yield per grade; 4140 QT condition up to 655 MPa |
| Elongation | 20% – 23% min (in 200 mm gauge) | Per ASTM A36 / EN 10025-2; indicates ductility and formability |
| Thickness Range | 3 mm – 100 mm (0.12″ – 4.0″) | Custom thickness available upon request from manufacturer |
| Width Range | 10 mm – 600 mm (0.4″ – 24″) | Standard and custom widths; tolerance per EN 10058 / ASTM A6 |
| Length | 3 m – 12 m (standard); custom cut-to-length available | Random or fixed length; mill length or customer-specified |
| Surface Finish | Hot rolled (black), cold drawn (bright), pickled & oiled, galvanized | Surface treatment selected based on application and corrosion requirements |
| Application | Construction, machinery frames, brackets, conveyors, shipbuilding, fabrication | Widely used in structural steel work, manufacturing, and general engineering |
| Certification | ISO 9001:2015, Mill Test Certificate (MTC) per EN 10204 3.1 / 3.2 | Third-party inspection available; SGS, BV, TÜV upon request |
| Packaging | Bundled with steel strapping; wooden pallet or bare bundle | Sea-worthy export packing; moisture-proof wrapping available |
| MOQ | 1 ton (stock items); 5 tons (custom orders) | Mixed grades and sizes accepted to meet minimum order quantity |
Steel Flat Bar Manufacturer - Mill Direct Factory Price
As a trusted steel flat bar manufacturer, we supply premium-grade flat bars directly from our mill facility, eliminating middlemen and delivering cost-effective pricing to clients across construction, fabrication, and industrial sectors. Our steel flat bars are precision-rolled to meet strict dimensional tolerances, ensuring consistent performance in structural frameworks, machinery bases, brackets, and support systems. With decades of manufacturing expertise, we serve contractors, distributors, and OEMs seeking reliable, high-volume supply with short lead times. Every flat bar we produce undergoes rigorous quality inspection aligned with international standards including ASTM, EN, and JIS, guaranteeing that each shipment meets your exact mechanical and dimensional requirements. Whether you need standard carbon steel flat bars or customized alloy grades, our mill-direct model ensures you receive superior quality materials at competitive factory prices — backed by full material certifications and dedicated technical support from inquiry through delivery.
What is Steel Flat Bar?
A steel flat bar is a long, rectangular solid steel section with a flat surface on all four sides, produced through hot rolling or cold drawing processes. It serves critical roles in construction, manufacturing, and engineering applications including grating supports, frames, anchors, and reinforcement components. Available in carbon steel, stainless steel, and alloy steel grades, flat bars offer excellent machinability and weldability for versatile end-use requirements.
Steel Flat Bar Technical Specifications
Our flat bars are manufactured to precise dimensional standards with widths ranging from 10 mm to 300 mm and thicknesses from 3 mm to 100 mm. Standard lengths are 6 m and 12 m, with custom cutting available. Key mechanical properties include a minimum yield strength of 250 MPa and tensile strength of 400–550 MPa for Grade S235/A36 carbon steel, with a density of 7.85 g/cm³. Surface conditions include hot-rolled, pickled, and oiled (P&O) or cold-drawn finishes. All products are certified to ASTM A36, EN 10058, and JIS G3194 standards, with full Mill Test Reports (MTR) provided per shipment.
Get a Competitive Quote for Steel Flat Bar
Ready to source directly from a certified steel flat bar manufacturer? Our team delivers mill-direct rates, fast turnaround, and full technical consultation to match the right grade and dimension to your project needs. Contact us now for a tailored quotation within 24 hours.
- 24/7 customer support available
- Free samples for quality evaluation
- Competitive pricing for bulk orders
- Professional technical consultation
Contact us today to get your free quote within 24 hours!
Ratings & Reviews
Know your supplier
Product Introduction
Hongji Profiles Co., Ltd. is a professional manufacturer and supplier specializing in the R&D, production and sales of high-quality steel profiles. With years of experience in the metallurgical industry, we have earned a solid reputation for reliability, precision and customer-centric service, providing global clients with premium steel profile solutions for diverse industrial and architectural needs.
Our core business covers a full range of steel profiles, including angle steel, channel steel, I-beams, H-beams, C-section steel, Z-section steel, flat steel and custom special steel profiles. These products are widely applied in building structures, bridges, transmission towers, industrial machinery, automotive components and shipping. We strictly control material selection, adopting high-quality steel grades such as S235JR, S355JR, SS400, A36 and Q355 series to ensure excellent mechanical properties, durability and corrosion resistance.
Guided by a customer-first philosophy, we have built a comprehensive sales and after-sales network. Our products are exported to Europe, North America, Southeast Asia and Africa, with long-term cooperation with well-known enterprises. Our team provides one-stop services, and we ensure prompt delivery through sufficient inventory and optimized logistics.
Upholding “Quality First, Integrity-based, Innovation-driven, Win-Win Cooperation”, Hongji is committed to becoming a global leader in the steel profile industry, continuously improving quality and service to create a better future with global customers.
FAQ
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
