Carbon Steel: Properties, Production, Examples and Applications

Carbon steel is an iron-carbon alloy, which contains up to 2.1 wt.% carbon. For carbon steels, there is no minimum specified content of other alloying elements, however, they often contain manganese. The maximum manganese, silicon and copper content should be less than 1.65 wt.%, 0.6 wt.% and 0.6 wt.%, respectively.

   Types of carbon steel and their properties

Carbon steel can be classified into three categories according to its carbon content: low-carbon steel (or mild-carbon steel), medium-carbon steel and high-carbon steel . Their carbon content, microstructure and properties compare as follows:

   Carbon Steel Description

Grade:

1)GB: Q195, Q215, Q235A, Q235B, Q235C, Q235D, Q255A, 255B, Q275, Q295A, Q295B, Q345B, Q345C, Q345D, Q345E, Q390A, Q390B, Q390C,Q390D, Q390E, Q420, Q420B, Q420C, Q420D, Q420E, Q460D, Q460E, Q500D, Q500E, Q550D, Q550E, Q620D, Q620E, Q690D, Q690E

2)EN: S185,S235JR, S275JR, S355JR, S420NL, S460NL S500Q, S550Q, S620Q, S690Q

3)ASTM: Grade B, Grade C, Grade D, A36, Grade 36, Grade 40, Grade42, Grade 50, Grade 55, Grade 60, Grade 65, Grade 80

4)JIS: SS330, SPHC, SS400, SPFC, SPHD, SPHE

   Product Details

   Production Process

Raw material smelting: Iron ore and coke are smelted in blast furnaces to generate molten iron, and then the composition is adjusted by converter/electric furnace steelmaking.

Refining and continuous casting: Molten steel is refined and purified by RH/LF and then continuously cast into slabs.

Rolling processing: After the surface of the slab is cleaned and straightened, it is hot rolled (high temperature) or cold rolled (normal temperature) to form, and descaling is required during the process.

Post-processing: Some products require heat treatment (quenching/annealing), and then undergo flaw detection, shot blasting, cutting, and flattening processes.

Finished product inspection: The final product is strictly inspected and marked and packaged before leaving the factory.

   Factory Appearance

We are a manufacturer and exporter specialized in the research, production, retail, wholesale, packaging, after-sales of metal materials. We have been engaged in export trade for more than 10 years and have rich experience in this field.

   Packing and shipping

Our geographical location has convenient transportation, developed logistics, and professional logistics and shipping. We provide customers with convenient, cost-reducing, and value-added services; we have won the recognition and trust of many customers.

   Application Areas

Products are widely used in precision instruments, aviation, ships, automobiles, medical, construction, Bridges, boilers, parts processing and other industries.

   Why Choose Us？

Shandong Zhongji Metal Products Co., Ltd. is a comprehensive steel enterprise integrating steel research and development, production, processing and trade. The company has a diversified product matrix, which is widely used in dozens of industries and exported to more than 50 countries and regions around the world, including Southeast Asia, the Middle East, Europe, Africa, and the Americas, and has established a good reputation in many international projects.