Carbon Steel Grade Q235B

Q235B Carbon Steel Sheet / Plate — Manufacturer, Price, Specifications

High-quality Q235B Carbon Steel Sheet / Plate — direct from factory

Direct Factory Price
MOQ from 1 Ton
Lead Time: 7-15 days
ISO 9001 & CE Certified
Grade: Q235B

What is Q235B Carbon Steel Sheet / Plate?

Q235B is the most common carbon structural steel in China, equivalent to ASTM A36. Good ductility and weldability, widely used in general structural applications. The "B" denotes quality grade with impact testing at 20°C.

Q235B Carbon Steel Sheet / Plate is one of our most popular products, widely used across various industries including building structure and steel frames and more.

Our q235b Carbon Steel Sheet / Plate are manufactured to the highest quality standards and come with full Mill Test Certificates (MTC).

Specifications & Dimensions

Hot rolled and cold rolled carbon steel plates for structural and fabrication use.

Thickness 0.3 mm - 200 mm
Width 1000 mm - 2500 mm (up to 3200mm for wide plate)
Length 2000 mm - 12000 mm
Standards ASTM A36 / A572 / A516 | GB/T 700 / GB/T 1591 | EN 10025 (S235 / S275 / S355) | JIS G3101 (SS400) / G3106 (SM490) | DIN 17100 (St37 / St52)
Product Types Hot Rolled Steel Plate (HR) · Cold Rolled Steel Sheet (CR) · Galvanized Steel Sheet (GI / HDG) · Checkered / Diamond Plate · Weathering Steel (Corten)
Available Grades Q235B / Q355B / Q345B / A36 / A572 Grade 50 / SS400 / S235JR / S355JR / St37 / St52

Standard Sizes & Weight Chart

Reference sizes and theoretical weights. Custom sizes available upon request.

ThicknessWidthLengthWeightNote
2.0 mm1250 mm2500 mm~49 kgCold rolled / hot rolled
3.0 mm1500 mm6000 mm~212 kgHot rolled plate
6.0 mm1500 mm6000 mm~424 kgHot rolled plate
10 mm2000 mm6000 mm~942 kgMedium plate
20 mm2000 mm6000 mm~1,884 kgHeavy plate
50 mm2200 mm8000 mm~6,908 kgThick heavy plate

Chemical Composition (%)

Chemical composition of Q235B grade, in accordance with relevant standards.

ElementRange / Max
Carbon (C)Max: 0.20%
Manganese (Mn)0.30 - 0.70%
Silicon (Si)Max: 0.35%
Sulfur (S)Max: 0.045%
Phosphorus (P)Max: 0.045%

Mechanical Properties

Typical mechanical properties of Q235B at room temperature.

PropertyValue
Tensile Strength375 - 460 MPa
Yield Strength (min, t≤16mm)235 MPa
Elongation (min)26%

Applications of Q235B Steel

Q235B steel is widely used in the following industries and applications:

  • Building structure and steel frames
  • Bridges and highway construction
  • Machinery parts and components
  • Pipe supports and racks
  • Storage tanks and containers
  • General fabrication

Why Choose Rubao-Chinasteel as Your Supplier?

Direct Factory Price

We own our manufacturing facilities, ensuring competitive pricing without middlemen markup.

Rigorous Quality Control

Every batch undergoes 3-stage inspection: raw material, production, and final testing with full test reports.

Fast Global Delivery

Standard orders ship within 7-15 days. Well-established logistics network to major ports worldwide.

Custom Processing

Cutting, bending, welding, polishing, and surface treatment available according to your drawings.

Flexible MOQ

Minimum order from 1 ton for standard products. Trial orders welcome for new customers.

24/7 Service

Dedicated sales engineer assigned to each order. Quick response via email, phone, and WhatsApp.

Frequently Asked Questions

What is Q235B steel?
Q235B is the most common carbon structural steel in China, equivalent to ASTM A36. Good ductility and weldability, widely used in general structural applications. The “B” denotes quality grade with impact testing at 20°C.
What sizes are available for Carbon Steel Sheet / Plate?
We supply Carbon Steel Sheet / Plate in 0.3 mm - 200 mm. Custom sizes are also available. Contact us with your specific requirements.
What is the minimum order quantity?
Our standard MOQ is 1 ton for stock products. Custom sizes may require higher MOQ. We are flexible — contact us to discuss your needs.
What is the lead time?
Standard stock products: 3-7 days. Custom products: 7-15 days. Large quantity orders: 15-30 days. We always confirm lead time before you place an order.
Do you provide Mill Test Certificates?
Yes! Every shipment includes a full Mill Test Certificate (MTC/MTR) showing chemical composition and mechanical properties, certified to EN 10204 3.1 standard.

Ready to Get Your Quote?

Send us your specifications and quantity, and we'll reply within 24 hours with a competitive offer.