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Home > Metallurgy, Mineral & Energy > Steel & Products > Steel Sheet & Plate > Standard Size Hot Rolled Carbon Steel Plate Q235B Q345b for Building Structural Use

Standard Size Hot Rolled Carbon Steel Plate Q235B Q345b for Building Structural Use

Standard Size Hot Rolled Carbon Steel Plate Q235B Q345b for Building Structural Use thumbnail-3

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Standard Size Hot Rolled Carbon Steel Plate Q235B Q345b for Building Structural Use photo-5

Product Spotlights

Standard size hot rolled carbon steel plate Q235B/Q345B for building structural use. High weldability, uniform surface, customizable dimensions. Factory-direct with ISO9001 quality management. Competitive pricing for global construction projects. Reliable supply from a certified manufacturer with 100+ employees and $50M+ annual exports.

US$ 0.4 - 0.6 MOQ: 100 Kilograms

Key Specifications

Get Latest Price

Application:

Other, Building Structural Use

Standard:

Other, GB/T 3274

material:

Carbon Steel

Contact Supplier Request Quote Chat Now

Wuxi Yansheng Technology Co., Ltd.

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

Shanghai

Delivery Detail:

15 days

Product Details
Company Profile
Contact Us

Application Other, Building Structural Use

Standard Other, GB/T 3274

material Carbon Steel

grade Q235B / Q345B (or equal grades)

thickness 6-200 mm (customizable)

width 1500-3000 mm (customizable)

length 6000-12000 mm (customizable)

surface Black / Pickled

processing Hot Rolled

Wuxi Yansheng Technology Co., Ltd., a professional manufacturer established in 2017 with over 100 employees and an annual export value of US$50-100 million, proudly offers Standard Size Hot Rolled Carbon Steel Plate Q235B Q345b for Building Structural Use. As a trusted supplier to global markets including North America, Europe, Southeast Asia, and the Middle East, we deliver consistent quality and competitive pricing. Our hot rolled carbon steel plates are engineered to meet the demanding requirements of building structures, providing excellent strength, weldability, and durability. Whether you need standard dimensions or customized sizes, we ensure every plate undergoes strict quality control to support your construction projects efficiently.

Key Features & Technical Specifications

Superior Material Composition: Made from high-quality carbon steel with controlled chemical composition (C ≤0.20%, Mn ≤1.40%, P ≤0.035%, S ≤0.035%) to guarantee excellent mechanical properties.
Grade Flexibility: Available in Q235B (yield strength ≥235 MPa) and Q345B (yield strength ≥345 MPa) grades, suitable for different load-bearing requirements in building structures.
Standardized Dimensions: Thickness from 6mm to 200mm, width from 1500mm to 3000mm, length from 6000mm to 12000mm — all compliant with international standards. Custom sizes are also available upon request.
Uniform Surface Quality: Surfaces are free from cracks, delamination, and excessive scale. Optional pickled and oiled surface treatment for enhanced corrosion resistance.
Excellent Weldability & Formability: Low carbon content and fine grain structure ensure easy welding, bending, and cutting without compromising strength.
Rigorous Testing: Each plate undergoes ultrasonic inspection, mechanical property testing, and chemical analysis to ensure compliance with GB/T 3274, ASTM A36, or equivalent standards.

Parameter	Q235B	Q345B
Tensile Strength (MPa)	370–500	470–630
Yield Strength (MPa)	≥235	≥345
Elongation (%)	≥26	≥21
Impact Test (0°C, J)	≥27 (Option)	≥34

Advantages for Buyers:

Cost-Effective: Direct factory sourcing eliminates middlemen, offering you competitive prices without compromising quality.
Reliable Supply Chain: With a factory size of 1,000-3,000 sqm and a dedicated team, we ensure timely delivery from Tianjin, Shanghai, Qingdao, or Ningbo ports.
Customization Services: Need special dimensions, edge processing, or additional surface treatment? We provide flexible solutions tailored to your project.
Technical Support: Our experienced engineers assist with material selection and application advice to optimize your structural design.

As an ISO9001, ISO14000, and OHSAS18001 certified manufacturer (among other certifications), Wuxi Yansheng Technology Co., Ltd. has built a solid reputation across 15+ global market regions. Since 2017, we have exported over US$300 million worth of steel products, with a customer satisfaction rate exceeding 98%. Our hot rolled carbon steel plates have been used in skyscrapers, bridges, warehouses, and industrial plants worldwide. We invite you to experience the quality and service that make us a preferred partner. Contact our sales team today for a quotation or to discuss your specific requirements!

Frequently Asked Questions (FAQ)

What is the difference between Q235B and Q345B steel plates?
Q345B offers higher yield strength (≥345 MPa) than Q235B (≥235 MPa), making it suitable for heavier structural loads. Both grades have good weldability, but Q345B is often used in high-rise buildings and bridges.
Can you supply plates with certified mill test certificates?
Yes, we provide MTC (Mill Test Certificate) for each batch, showing chemical composition and mechanical properties as per GB/T or ASTM standards.
What are the standard sizes you stock?
Common stock sizes include thicknesses 8mm, 10mm, 12mm, 16mm, 20mm, 25mm; widths 1500mm, 2000mm, 2500mm; lengths 6000mm, 9000mm, 12000mm. Other sizes are available with short lead times.
Are your plates suitable for outdoor structures?
Yes, but for outdoor use we recommend applying anti-corrosion paint or opting for pickled & oiled surface treatment. Our plates can also be galvanized as per your request.
What is your minimum order quantity (MOQ)?
MOQ is typically 25 tons per size and grade. For trial orders, smaller quantities can be arranged at a slight price adjustment.
How do you ensure the quality of each plate?
We follow a strict QC process: incoming material inspection, in-process hot rolling monitoring, final ultrasonic testing (optional), and mechanical testing per sample. Our ISO9001 system ensures traceability.
What are the payment terms?
Common terms include T/T (30% deposit, 70% against copy of B/L) or L/C at sight. For long-term customers, negotiable terms are available.
Can you arrange delivery to my country?
Absolutely. We ship through Tianjin, Shanghai, Qingdao, or Ningbo ports to destinations worldwide. Our logistics team handles all documentation and ensures safe packaging.