Q235B Q355B Carbon Steel Sheet Plate Hot Rolled Structural Steel Plate
Chemical Composition (Typical for Q235B & Q355B)
Q235B Carbon Steel Plate
| Element | Content (%) |
| Carbon (C) | ≤ 0.22 |
| Silicon (Si) | ≤ 0.35 |
| Manganese (Mn) | ≤ 1.40 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.045 |
Q355B Carbon Steel Plate
| Element | Content (%) |
| Carbon (C) | ≤ 0.24 |
| Silicon (Si) | ≤ 0.55 |
| Manganese (Mn) | ≤ 1.60 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Niobium (Nb) | ≤ 0.07 |
| Vanadium (V) | ≤ 0.15 |
| Titanium (Ti) | ≤ 0.20 |
The chemical composition of Q235B provides excellent weldability, ductility, and reliable performance for general structural applications. Q355B, with its higher strength and improved mechanical properties, is better suited for heavy-duty structures, large-scale engineering projects, and applications requiring enhanced load-bearing capacity and durability.
Mechanical Properties (Yield Strength & Tensile Strength)
Q235B Carbon Steel Plate
Yield Strength: ≥ 235 MPa
Tensile Strength: 370 – 500 MPa
Q355B Carbon Steel Plate
Yield Strength: ≥ 355 MPa
Tensile Strength: 470 – 630 MPa
| Gauge Thickness Comparison Table | ||||
| Gauge | Mild | Aluminum | Galvanized | Stainless |
| Gauge 3 | 6.08mm | 5.83mm | 6.35mm | |
| Gauge 4 | 5.7mm | 5.19mm | 5.95mm | |
| Gauge 5 | 5.32mm | 4.62mm | 5.55mm | |
| Gauge 6 | 4.94mm | 4.11mm | 5.16mm | |
| Gauge 7 | 4.56mm | 3.67mm | 4.76mm | |
| Gauge 8 | 4.18mm | 3.26mm | 4.27mm | 4.19mm |
| Gauge 9 | 3.8mm | 2.91mm | 3.89mm | 3.97mm |
| Gauge 10 | 3.42mm | 2.59mm | 3.51mm | 3.57mm |
| Gauge 11 | 3.04mm | 2.3mm | 3.13mm | 3.18mm |
| Gauge 12 | 2.66mm | 2.05mm | 2.75mm | 2.78mm |
| Gauge 13 | 2.28mm | 1.83mm | 2.37mm | 2.38mm |
| Gauge 14 | 1.9mm | 1.63mm | 1.99mm | 1.98mm |
| Gauge 15 | 1.71mm | 1.45mm | 1.8mm | 1.78mm |
| Gauge 16 | 1.52mm | 1.29mm | 1.61mm | 1.59mm |
| Gauge 17 | 1.36mm | 1.15mm | 1.46mm | 1.43mm |
| Gauge 18 | 1.21mm | 1.02mm | 1.31mm | 1.27mm |
| Gauge 19 | 1.06mm | 0.91mm | 1.16mm | 1.11mm |
| Gauge 20 | 0.91mm | 0.81mm | 1.00mm | 0.95mm |
| Gauge 21 | 0.83mm | 0.72mm | 0.93mm | 0.87mm |
| Gauge 22 | 0.76mm | 0.64mm | 085mm | 0.79mm |
| Gauge 23 | 0.68mm | 0.57mm | 0.78mm | 1.48mm |
| Gauge 24 | 0.6mm | 0.51mm | 0.70mm | 0.64mm |
| Gauge 25 | 0.53mm | 0.45mm | 0.63mm | 0.56mm |
| Gauge 26 | 0.46mm | 0.4mm | 0.69mm | 0.47mm |
| Gauge 27 | 0.41mm | 0.36mm | 0.51mm | 0.44mm |
| Gauge 28 | 0.38mm | 0.32mm | 0.47mm | 0.40mm |
| Gauge 29 | 0.34mm | 0.29mm | 0.44mm | 0.36mm |
| Gauge 30 | 0.30mm | 0.25mm | 0.40mm | 0.32mm |
| Gauge 31 | 0.26mm | 0.23mm | 0.36mm | 0.28mm |
| Gauge 32 | 0.24mm | 0.20mm | 0.34mm | 0.26mm |
| Gauge 33 | 0.22mm | 0.18mm | 0.24mm | |
| Gauge 34 | 0.20mm | 0.16mm | 0.22mm | |
Main Features of Q235B / Q355B Carbon Steel Plate
High Strength & Durability: Q235B provides reliable structural performance, while Q355B offers higher yield strength and improved load-bearing capacity for demanding engineering projects.
Excellent Weldability: Both grades feature good welding performance, making them easy to fabricate, process, and assemble for various steel structures.
Wide Application Range: Suitable for construction, bridges, machinery manufacturing, industrial buildings, and heavy-duty engineering projects.
Customized Solutions: Available in different thicknesses, widths, lengths, and surface treatments to meet specific project requirements.
Strict Quality Control: Manufactured according to international standards with stable chemical composition, consistent mechanical properties, and reliable performance.
Cost-Effective Steel Solution: Combines high performance, long service life, and competitive pricing for global construction and industrial applications.
Q235 Q345 Carbon Steel Plate Supplier is a steel with iron as the main element and carbon content between 0.12% and 2.0%. It mainly has low carbon steel plate, medium carbon steel plate, high carbon steel plate and alloy steel plate and other different varieties. Due to its excellent properties, carbon steel plates have been widely used in industrial and civil fields.
Note:
1.Free sampling, 100% after-sales quality assurance, Support any payment method;
2.All other specifications of round carbon steel pipes are available according to your requirement (OEM&ODM)! Factory price you will get from ROYAL GROUP.
High hardness: carbon steel plate due to its high carbon content, so its hardness is much higher than ordinary steel;
Properties and Transportation Information of Carbon Steel Plates
Material Grade: Available in Q235B and Q355B structural steel grades, offering reliable performance for various engineering applications.
High Strength Performance: Q355B provides higher yield strength than Q235B, making it suitable for heavy-load structures and demanding projects.
Excellent Weldability & Formability: Easy to cut, weld, bend, and process, ensuring efficient fabrication and installation.
Uniform Quality: Stable chemical composition and consistent mechanical properties ensure dependable structural performance.
Wide Thickness Range: Available in customized thicknesses, widths, and lengths to meet different project requirements.
Strong Durability: Offers good resistance to mechanical stress and deformation, suitable for long-term structural applications.
Versatile Applications: Widely used in steel buildings, bridges, machinery, shipbuilding, industrial equipment, and infrastructure projects.
Transportation: Express (Sample Delivery), Air, Rail, Land, Sea shipping (FCL or LCL or Bulk)
Q1: What is the difference between Q235B and Q355B steel sheet?
A: Q235B is a general structural steel with good weldability and ductility, suitable for common construction applications. Q355B has higher yield strength and better mechanical properties, making it ideal for heavy-duty structures and large engineering projects.
Q2: What standards do Q235B and Q355B steel sheets follow?
A: Q235B and Q355B steel sheets are manufactured according to Chinese GB/T standards and can also be supplied with equivalent international standards such as EN S235JR/S355JR or ASTM grades according to customer requirements.
Q3: What sizes of Q235B/Q355B steel sheets are available?
A: We provide customized thicknesses, widths, and lengths based on project requirements. Common thickness ranges are available for both standard and heavy steel plate applications.
Q4: Can the steel sheets be customized?
A: Yes. We offer customized cutting, drilling, surface treatment, edge processing, and other fabrication services according to customer drawings and specifications.
Q5: What are the main applications of Q235B and Q355B steel sheets?
A: They are widely used in steel structures, warehouses, bridges, machinery manufacturing, industrial equipment, shipbuilding, and infrastructure construction.
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