
// Product Description //
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 [1]. Their carbon content, microstructure and properties compare as follows:

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
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Hongke
WHY
CHOOSE US
Wuxi Hongke Special Steel Co., Ltd. is a one-stop specialty steel supplier integrating R&D, production, deep processing, and international trade, delivering fully certified, standard-compliant solutions for global infrastructure and industrial projects.
Production Capacity
Full-process in-house production including hot rolling, cold rolling, galvanizing, pipe making, and section steel forming, supported by comprehensive physical & chemical testing instruments.
Customization Capabilities
Wide product range covering coils, sheets, bars, pipes, sections, and profiles, with customization available according to GB, ASTM, EN, JIS, AS, and GOST standards.
Authoritative Certification
Certified with ISO9001, ISO14001, CE, API 5L/5CT, ASTM and EN, ensuring stable and internationally compliant product quality.
Application Areas
Products are widely used in construction, machinery manufacturing, steel structures, energy transmission, auto parts, hardware, shipbuilding, and infrastructure projects.
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