Q235B HR Steel Plate 3-200mm Thickness Hot Rolled Carbon Steel for Construction
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Detail
Q235B is a widely used carbon structural steel compliant with China's national standard GB/T 700-2006 (Carbon Structural Steels). As a low-carbon steel grade, it features excellent weldability, formability, and cost-effectiveness, making it the preferred material in construction, machinery, and infrastructure projects globally. Our Q235B steel plates are manufactured via hot-rolling process, ensuring uniform mechanical properties and stable performance, suitable for both standard and custom applications.
Core Technical Specifications
Item
Specification
Steel Grade
Q235B (Equivalent to DIN ST37-2, ASTM A36 in similar performance)
Stable Material Performance Strictly produced in line with GB/T 700-2006, Q235B steel plates have consistent chemical composition and mechanical properties, ensuring reliability in load-bearing and structural applications.
Excellent Processability Low carbon content enables easy welding (compatible with arc welding, gas welding), cutting (flame cutting, plasma cutting), and bending without cracking, reducing processing costs for customers.
Cost-Effective Solution Compared with high-alloy steels, Q235B offers a balanced combination of performance and cost, ideal for large-scale projects (e.g., factory buildings, bridges) where budget control is critical.
Flexible Customization We support customization of thickness, width, length, and surface treatment (e.g., galvanizing for corrosion resistance) to meet specific project requirements.
International Quality Certification Our production line is ISO 9001 certified, and all Q235B steel plates pass third-party inspections (SGS/BV) to ensure compliance with international quality standards, facilitating global logistics and project approval.
Typical Applications
Q235B carbon steel plates are widely used in various industries due to their versatility:
Construction & Infrastructure: Factory buildings, steel structures, roof trusses, bridge components, and high-speed rail substructures.
General Engineering: Scaffolding, guardrails, and structural supports for civil engineering projects.
Quality Control & Inspection
To ensure product quality, we implement strict quality control throughout the production process:
Raw Material Inspection: Test iron ore and scrap steel for chemical composition before melting.
Rolling Process Monitoring: Real-time control of rolling temperature, speed, and pressure to guarantee uniform thickness and structure.
Final Testing: Each batch of steel plates undergoes:
Tensile test and bending test (to verify mechanical properties).
Chemical composition analysis (via spectrometer).
Surface and dimensional inspection (to eliminate defects like cracks or uneven thickness).
Order Information
Minimum Order Quantity (MOQ): 5 tons (for standard sizes); 10 tons for customized specifications.
Lead Time: 7-15 working days for standard orders; 15-25 working days for customized orders.
Packaging: Standard seaworthy packaging (waterproof paper + steel strips) to prevent damage during transportation; wooden pallets available for small batches.
Payment Terms: T/T (30% advance payment, 70% balance against B/L copy), L/C at sight (for large orders).
FAQ
Is Q235B equivalent to A36 or ST37-2? Yes, Q235B has similar mechanical properties to ASTM A36 (USA) and DIN ST37-2 (Germany), but with slight differences in chemical composition. It can be used as a substitute in most non-high-pressure structural applications.
Can you provide samples before mass production? Yes, we offer free samples (up to 2 pieces, size: 300mm×300mm) with the sample delivery cost borne by the customer.
Do you provide international shipping? We cooperate with professional freight forwarders and can arrange shipping to major ports worldwide (e.g., Shanghai, Shenzhen for export; Rotterdam, Houston for import). Door-to-door delivery is also available upon request.