QIDAMT · CARBON STEEL FLAT BAR
Q235B Carbon Steel Flat Bar – Hot Rolled Mild Steel Flat
Hot-rolled Q235B flat bar for brackets, cutter stock, machine parts, gaskets and general fabrication.
Q235B carbon steel flat bar is a hot-rolled rectangular flat section of mild steel. It is low-cost, easy to cut and weld, and is the standard flat stock for a wide range of fabrication and machine parts.
Key Advantages
Low Cost
Cheapest flat stock for indoor use.
Easy Machining
Drilling, milling, sawing all easy.
Wide Sizes
Width 12 – 200 mm, thickness 3 – 60 mm.
Weldable
Excellent TIG/MIG welding response.
Chemical Composition (Q235B)
| Element | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| Content % | ≤ 0.20 | ≤ 0.35 | 0.30 – 0.70 | ≤ 0.045 | ≤ 0.045 |
Mechanical Properties
- Tensile strength (σb): 375 – 460 MPa
- Yield strength (σs): ≥ 235 MPa
- Elongation (δ): ≥ 26 %
- Impact (Charpy V): ≥ 27 J at +20 °C
Standard Sizes
| Parameter | Range |
|---|---|
| Width | 12 – 200 mm |
| Thickness | 3 – 60 mm |
| Length | 3 – 6 m (cut to length) |
| Surface | Black / bright / galvanized |
| Standard | GB/T 704 / JIS SS400 / ASTM A36 |
Applications
Q235B flat bar is used for brackets, gusset plates, machine parts, jigs, tool holders, cutlery blanks, gaskets and repair parts. For high-strength see our Q235B flat range; for aluminum flat see 6061 aluminum flat.
Processing & Packaging
Cutting, sawing, chamfering, drilling and CNC machining available. Bars are strapped in bundles on wooden pallets.
Request a Q235B flat bar quote
Send width, thickness, length and quantity — we confirm price within 24 hours.
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