c55 steel

C55 steel, also known as 1.0535, is a medium carbon steel that is commonly used in the manufacturing of high-strength carbon steel components, such as axles, gear shafts, and spring parts. This type of steel is durable, has high strength, and is resistant to wear and tear. In this article, we will discuss the properties, characteristics, and applications of C55 steel.

Properties of C55 Steel

– Density: 7.85 g/cm3

– Melting point: 1420-1460℃

– Hardness: 170-210 HB

– Tensile strength: 620-700 MPa

– Yield strength: 350-450 MPa

– Modulus of elasticity: 210 GPa

– Poisson’s ratio: 0.3

Characteristics of C55 Steel

C55 steel has a good combination of strength, toughness, and wear resistance. It is a medium carbon steel, which means it has a carbon content of 0.52-0.60%, making it easier to forge and heat treat than high carbon steels. C55 steel can be hardened by quenching and tempering, which improves its mechanical properties. It also has good machinability, weldability, and formability.

Applications of C55 Steel

C55 steel is used in a variety of applications, including:

– Axles: C55 steel is commonly used to manufacture axles for machinery and vehicles. With its high strength and durability, it can handle heavy loads and withstand wear and tear.

– Gear shafts: C55 steel is also used to produce gear shafts for various industries, such as aerospace, automotive, and manufacturing. Its excellent wear resistance and toughness make it suitable for gear applications.

– Spring parts: C55 steel is an ideal material for making springs and other high-stress components that require good fatigue resistance. It can be easily shaped and has good mechanical properties.

– Other applications: C55 steel is also used to produce machine parts, tools, and components that require high strength and durability.


In conclusion, C55 steel is a medium carbon steel that has excellent mechanical properties, making it suitable for various applications. Its high strength, toughness, and wear resistance make it an ideal material for manufacturing axles, gear shafts, and spring parts. C55 steel is easy to forge, heat treat, and machine, which makes it a versatile material in the manufacturing industry.

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