Carbon Steel Coil

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Q345 Q345B Carbon Steel coil

Carbon Steel (Carbon Steel) refers to the carbon content of more than 0.02% and less than 2% (higher than 2% is called cast iron, less than 0.02% is called wrought iron), and few other elements of steel. It is usually used on metal parts that require strength, hardness and wear resistance, such as cutting tools, steel cables, piano wires, springs and tools, etc., after the processing is formed, the parts usually need to be treated and tempered. The higher the carbon content of the steel, the higher the hardness, strength and wear resistance after heating treatment. Carbon steel is divided into high carbon steel, medium carbon steel and low carbon steel, and these three carbon steel are divided into two; According to the characteristics, high carbon steel is hard and brittle, low carbon steel is soft and ductile.

Product Description
Q235B, Q345B and Q355B differ in composition, use and characteristics as follows:

Composition: The composition of Q235B is mainly silicon, manganese, phosphorus, sulfur, carbon and other elements, while the composition of Q345B and Q355B adds vanadium, titanium, niobium, magnesium and other elements on this basis, making their composition different.
Application: Q235B is suitable for general structures, such as Bridges, buildings, pipelines, etc., and can also be used as low carbon steel for carburizing, ammoniating and other treatment. Q345B is suitable for manufacturing construction Bridges, important warehouses, vehicles, agricultural machinery, large steel structures, Marine engineering, etc., its application range is more extensive than Q235B. The Q355B is suitable for the manufacture of ships, boilers, pressure vessels, electricity, etc., and is often used in the manufacture of various machinery and equipment.

Characteristics: Q235B has good welding performance and low temperature toughness, and its strength and hardness are low. Q345B has good low temperature toughness, high yield strength and tensile strength, and high elongation and section shrinkage. Q355B has higher strength and hardness, but less toughness.


Cold rolled Steel




Commercial / Drawing / Deep Drawing /Extra Deep Drawing/Structural quality

Surface treatment:

Chromated and oiled, and ant-ifinger


Softy, half hard ,hard quality








Coil weight:

3-8MT/Coil or as your request




Export standard, seaworthy


508mm or 610mm

Trade Term:


Transport Type:

Container, bulk and train

Our factory is located in industrial park ,Boxing County Dianzi Town, Binzhou City, Shandong Province, China . 
Our products' quality is ensured by advanced, excellent facilities and manufacturing equipment. We have introduced many advanced processing and inspection equipments, including plasma cutting machine, NC drilling equipment, automatic welding system, welding equipment and real-time online imaging detection system, etc., which successfully ensure excellent quality of our products.

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We stand out from others, simply because we are a team of experienced engineers with highest attention to technical details and quality details. Backed by a network of steel mills, we have built robust capabilities and retained solid experiences in supplying steel and engineered products from reliable source at cost effective price within guaranteed delivery time.

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