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Steel Flat Bar Supplier in China
SKSteel is a professional Steel Flat Bar supplier in China, providing a wide range of mild steel flat bars and flat bars slit from HRC or HR Strip for construction, fabrication, infrastructure and industrial projects. As a leading China steel flat bar stockist, we maintain ready stock flat bar in various sizes and grades for immediate shipment worldwide.
Steel Flat Bar Production Standards/ Specifications/ Grades Available
| Standards | Grade |
|---|---|
| GB Standards | Q235B, Q355B |
| ASTM Standards | A36, A572 Grade 50 |
| JIS Standards | SS400, SM490 |
| EN Standards | S235JR, S275JR, S355JR |
Steel Angle Sizes Available & Steel Angle Weight Chart
| Country / Region | Dimensions Standard | Material Standard | Notes | Sample |
|---|---|---|---|---|
| European Union / EN | EN 10058 - Hot rolled flat steel bars: dimensions and tolerances | EN 10025 - S235/S275/S355 structural steels | Common for European projects. Typical grades include S235JR and S355JR. | Get Sample |
| Germany / DIN | DIN EN 10058 | DIN EN 10025 | Many older DIN standards have been replaced by EN standards. German projects often specify DIN EN. | Get Sample |
| United States / ASTM | ASTM A6/A6M - General requirements for rolled structural steel; ASTM A29/A29M - General requirements for hot-wrought carbon and alloy steel bars | ASTM A36/A36M; ASTM A572/A572M; ASTM A108 for cold-finished carbon and alloy steel bars | US orders often combine a material specification with a dimensional or general requirement standard. | Get Sample |
| Japan / JIS | JIS G 3194 - Dimensions, mass and permissible variations of hot rolled flat steel bars | JIS G 3101 - SS400 and other rolled steels for general structure; JIS G 4051 - S45C and other carbon steels for machine structural use | SS400 flat bar is common. For machined parts, confirm the exact grade and delivery condition. | Get Sample |
| United Kingdom / BS | BS EN 10058 | BS EN 10025; BS 970 may appear for engineering steels | Most UK structural steel references now align with EN standards, though older projects may still cite BS 970. | Get Sample |
| China | GB/T 702 - Dimensions, shape, weight and tolerances for hot rolled steel bars | GB/T 700 - Q235/Q275; GB/T 1591 - Q355; GB/T 699 - quality carbon structural steel; GB/T 3077 - alloy structural steel | Common for domestic China orders and some export orders. Specify both dimensional standard and material standard. | Get Sample |
| India / IS | IS 1730 - Dimensions for steel plates, sheets, strips and flats; IS 1852 - Rolling and cutting tolerances for hot rolled steel products | IS 2062 - Structural steel | Common for India projects. Confirm whether BIS/IS certification is required by the buyer. | Get Sample |
| Australia / New Zealand | Project specifications may accept AS/NZS, EN, or ASTM dimensional systems | AS/NZS 3679.1 - Hot rolled structural steel bars and sections | Follow the project specification. EN or ASTM equivalents are often accepted when clearly stated. | Get Sample |
| Material Standard | Grade | C % | Si % | Mn % | P % | S % | Cu % | V % | Other | Sample |
|---|---|---|---|---|---|---|---|---|---|---|
| GB/T 700 | Q235B | <=0.20 | <=0.35 | <=1.40 | <=0.045 | <=0.045 | Get Sample | |||
| GB/T 1591 | Q355B | <=0.24 | <=0.55 | <=1.60 | <=0.035 | <=0.035 | <=0.30 | Get Sample | ||
| EN 10025-2 | S235JR | <=0.17 | <=0.35 | <=1.40 | <=0.035 | <=0.035 | <=0.30 | Get Sample | ||
| EN 10025-2 | S355JR | <=0.24 | <=0.55 | <=1.60 | <=0.035 | <=0.035 | <=0.30 | Get Sample | ||
| ASTM A36/A36M | A36 | <=0.26 | <=0.40 | 0.80-1.20 | <=0.040 | <=0.050 | <=0.20 | Get Sample | ||
| ASTM A572/A572M | Grade 50 | <=0.23 | <=0.40 | <=1.35 | <=0.040 | <=0.050 | <=0.05 | Nb/V may apply | Get Sample | |
| JIS G 3101 | SS400 | <=0.050 | <=0.050 | Get Sample | ||||||
| JIS G 4051 | S45C | 0.42-0.48 | 0.15-0.35 | 0.60-0.90 | <=0.030 | <=0.035 | Get Sample |
| Material Standard | Grade | Yield Strength ReH/Rp0.2 MPa | Tensile Strength Rm MPa | Elongation A % | Notes | Sample |
|---|---|---|---|---|---|---|
| GB/T 700 | Q235B | >=235 | 370-500 | >=26 | for thickness <=16 mm; | Get Sample |
| GB/T 1591 | Q355B | >=355 | 470-630 | >=22 | for thickness <=16 mm; | Get Sample |
| EN 10025-2 | S235JR | >=235 | 360-510 | >=26 | for thickness <=16 mm; | Get Sample |
| EN 10025-2 | S355JR | >=355 | 470-630 | >=22 | for thickness <=16 mm; | Get Sample |
| ASTM A36/A36M | A36 | >=250 | 400-550 | >=20 | Chemistry varies by product form and thickness. | Get Sample |
| ASTM A572/A572M | Grade 50 | >=345 | >=450 | >=18 | Chemistry limits depend on product form. | Get Sample |
| JIS G 3101 | SS400 | >=245 | 400-510 | >=21 | Mainly controls P, S and mechanical properties. | Get Sample |
| JIS G 4051 | S45C | Typical >=345 | Typical >=570 | Typical >=20 | Values depend on heat treatment/bar size. | Get Sample |
Theoretical weight is calculated by: width (mm) * thickness (mm) * 0.00785 = kg/m.
Final available sizes and tolerance should be confirmed according to mill production and order quantity.
| Size (mm) | Thickness (mm) | Size (mm) | Thickness (mm) | Sample |
|---|---|---|---|---|
| 10-16 | 1.0-8.0 | 61-70 | 1.0-15 | Get Sample |
| 14-17 | 1.0-10.0 | 71-80 | 1.0-20 | Get Sample |
| 18-20 | 1.0-12 | 81-90 | 1.0-20 | Get Sample |
| 21-30 | 1.0-15 | 91-100 | 1.0-20 | Get Sample |
| 31-40 | 1.0-15 | 101-110 | 1.0-25 | Get Sample |
| 41-50 | 1.0-15 | 110-150 | 1.0-25 | Get Sample |
| 51-60 | 1.0-15 | 151-200 | 1.0-25 | Get Sample |
Applications
Steel Flat Bar is widely used for steel structures, general fabrication, construction components, brackets, frames, base plates, supports, clamps, railings, gates, trailers, agricultural equipment, shipbuilding, repair work and industrial maintenance.
Challenges & Needs
Dimensional Inconsistency
Material Strength Variations
Lack of Anti-Rust Treatment
Steel Flat Bar Export Packing and Loading
At SKSteel, all Steel Flat Bars are packed in bundles according to international export standards with steel strips to ensure safe transportation, efficient loading, and protection against damage during sea, rail, and truck transportation. The packing is suitable for container shipments, bulk vessel shipments, and project cargo deliveries worldwide. Especially for container shipment, SKSteel has considerable experience to load steel flat bar into 20GP and 40HQ containers according to the specific sizes, bundle weight and customers’ requirements.
Why choose SKSteel as your Trusted China Hot Rolled Steel Flat Bar Supplier?
- Extensive Steel Flat Bar Ready Stock for Fast Delivery
- Full Range of Sizes, Specifications and Grades
- Direct connections with leading steel flat bar manufacturers
- 18 years of experience to ship steel flat bar by 20GP, 40HQ container, and break bulk vessel
- Value-added processing services
- One-stop Structural Steel Supply
Steel Flat Bar Value-Added Services
We provide more than high-quality Steel Flat Bars; we offer full-chain services to remove manufacturing hurdles
High-Precision Fabrication
Surface Protection
Optimized Logistics
Transparent Delivery
Collaboration with SK STEEL
FAQ for Steel Supply Services
1.What is Steel Flat Bar?
Steel Flat Bar is a rectangular steel section with a flat surface and straight edges. It is widely used in fabrication, construction, frames, supports, brackets, machinery parts and general industrial projects because it is easy to cut, weld, drill, punch and process.
What is the difference between Hot Rolled Flat Bar and Slit Flat Bar from HRC?
Hot Rolled Flat Bar is kind of Flat Bar directly hot rolled by steel billet, but for slit Flat Bar, it is produced from Hot Rolled Coil or Hot Rolled Strip by slitting into the required sizes.
What is the standard length of Hot Rolled Steel Flat Bar in China?
6meter
9meter
12meter
Can SKSteel provide cut-to-length Steel Flat Bars?
Yes. We offer value-added processing services including:
Cutting
Drilling
Punching
Welding
Surface treatment
Painting Fabrication
What’s the difference between Flat Bar and Square Bar?
Steel Flat Bar has a rectangular cross section with width larger than thickness, while Square Bar has equal width and thickness. Flat Bar is commonly used for plates, straps, frames and brackets, while Square Bar is often used for shafts, supports, pins and decorative fabrication.
Can 6meter or 12meter Steel Flat Bar be loaded into 20ft Container or 40ft Container?
Yes, SKSteel can make shipment for 6meter steel flat bar by 20ft Container and 12meter steel flat bar by 40ft Container according to bundle weight, size range and loading plan.