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Flat Steel Bar for Sale | Hot Rolled & Cold Drawn Flat Bar Stock at 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 Flat Steel Bar
| Property | Parameter | Description |
|---|---|---|
| Product Name | Flat Steel Bar | Hot rolled or cold drawn flat bar for structural and industrial use |
| Material Grade | A36 / SS400 / Q235B / S235JR | Equivalent grades across ASTM, JIS, GB, and EN standards |
| Standard Compliance | ASTM A36 / EN 10058 / JIS G3101 / GB/T 702 | International quality and dimensional standards |
| Carbon (C) | ≤ 0.26% | Per ASTM A36 chemical composition requirements |
| Manganese (Mn) | 0.60 - 1.20% | Enhances strength and hardenability |
| Silicon (Si) | ≤ 0.40% | Improves strength and deoxidation |
| Phosphorus (P) | ≤ 0.040% | Controlled to ensure weldability and toughness |
| Sulfur (S) | ≤ 0.050% | Minimized to prevent hot shortness |
| Tensile Strength | 400 - 550 MPa | Per ASTM A36: min. 400 MPa (58 ksi) |
| Yield Strength | ≥ 250 MPa | Per ASTM A36: min. 250 MPa (36 ksi) |
| Elongation | ≥ 20% | Measured on 200 mm gauge length specimen |
| Thickness Range | 3 - 200 mm | Customizable per customer specification |
| Width Range | 10 - 600 mm | Standard and non-standard widths available |
| Length Range | 3,000 - 12,000 mm | Cut-to-length service available upon request |
| Surface Finish | Hot Rolled / Pickled / Polished | Mill finish or customized surface treatment |
| Application | Construction, machinery, bridges, automotive, shipbuilding | Widely used in structural frames, base plates, and brackets |
| Certification | ISO 9001, SGS, Mill Test Certificate (EN 10204 3.1) | Third-party inspection available on request |
| Packaging | Bundled with steel strips, waterproof paper wrapped | Seaworthy export packaging with tags and markings |
Flat Steel Bar for Sale | Hot Rolled & Cold Drawn Flat Bar Stock at Factory Price
Flat steel bar for sale remains one of the most sought-after structural profiles in construction, manufacturing, and fabrication industries worldwide. As a versatile solid steel section with a rectangular cross-section, flat bar stock delivers exceptional machinability, weldability, and load-bearing capacity across countless applications. Whether you need hot rolled flat bars for heavy structural frameworks or cold drawn flat steel for precision machining components, sourcing directly from an established mill supplier ensures premium grade material at cost-effective pricing. Our facility produces flat steel bar in a comprehensive range of carbon, alloy, and stainless steel grades, with thickness from 3 mm to 200 mm and widths from 10 mm to 600 mm — all manufactured to international standards including ASTM A36, ASTM A572, EN 10058, and GB/T 702.
What Is Flat Steel Bar?
A flat steel bar is a solid, rectangular-profile steel product manufactured through hot rolling or cold drawing processes. Defined by its width-to-thickness ratio (typically greater than 2:1), flat bar differs from steel plate by its narrower width and from square bar by its non-equal cross-sectional dimensions. Hot rolled flat bars feature a characteristic mill scale surface with tolerances per ASTM A29 (±0.4 mm for widths under 75 mm), while cold drawn flat bars achieve tighter dimensional tolerances of ±0.1 mm with a smooth, bright surface finish ideal for precision applications. Common grades include A36 (yield strength of 250 MPa minimum), A572 Grade 50 (yield strength of 345 MPa minimum), and 1045 medium carbon steel (tensile strength of 585 MPa minimum).
Flat Bar Stock Technical Specifications
Our flat steel bar inventory covers the full spectrum of industrial requirements. Below are the key technical parameters:
- Material Grades: ASTM A36, A572 Gr.50, 1018, 1045, 4140, SS 304/316, Q235B, Q345B, S235JR, S355JR
- Thickness Range: 3 mm – 200 mm
- Width Range: 10 mm – 600 mm
- Standard Lengths: 6 m, 9 m, 12 m, or cut-to-length
- Surface Finish: Hot rolled (mill scale), cold drawn (bright), galvanized, or painted
- Tolerances: Hot rolled per EN 10058 / ASTM A29; Cold drawn per ASTM A108 (tolerance class CF)
- Density: 7.85 g/cm³ for carbon steel; 7.93 g/cm³ for 304 stainless steel at 20°C
- Annual Production Capacity: 150,000 metric tons
Hot rolled flat bars serve critical roles in structural bracing, base plates, trailer manufacturing, and agricultural equipment. Cold drawn flat steel finds extensive application in die keys, machine guides, lock components, and architectural trim where dimensional precision and superior surface quality are non-negotiable. Stainless steel flat bars in grades 304 (with 18% chromium and 8% nickel content) and 316 (containing 2% molybdenum) deliver outstanding anti-corrosion properties for chemical processing, marine hardware, and food-grade equipment fabrication.
Get a Competitive Quote for Flat Steel Bar
As a direct mill supplier with over 15 years of export experience, we offer flat bar stock at factory-direct rates with no middleman markup. Whether you require a single bundle or full container loads, our dedicated team ensures fast turnaround from inquiry to delivery.
- 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
