Technical Information > Material S235

Material S235

Material S235 is among the most common structural steels used throughout Europe. It is an unalloyed structural steel of standard quality hot-rolled. Thanks to its excellent mechanical properties, easy workability, and wide range of applications, S235 is an ideal material for various industrial applications, including the manufacturing of containers.

Basic Properties of Material S235

Steel S235 is known for its minimum yield strength of 235 MPa (measured at a thickness of 16 mm), which guarantees its strength and resistance to mechanical stress. This material is also characterized by good plasticity, toughness, and excellent properties when bending in the cold state.

In terms of chemical composition, steel S235 is strictly regulated by the European standard EN 10025-2. It contains a maximum of 0.22% carbon, 1.60% manganese, 0.05% phosphorus, and 0.05% sulfur. This combination of elements ensures its optimal mechanical properties and also guarantees its good weldability, which is key in the manufacturing of welded structures.

S235 is additionally valued for its high strength-to-weight ratio, which allows for the construction of lightweight yet durable products.

Use of Steel S235 in Industry

Due to its properties, S235 is widely used in various areas of industry, particularly where a durable yet easily workable material is needed. This type of steel is ideal for the manufacturing of welded, bolted, and riveted structures. Common applications include:

  • Building and hall construction: Load-bearing structures made of S235 steel are a key element in the construction of industrial and civil buildings. Its strength and good weldability allow for easy assembly and long service life of structures.
  • Bridge structures: Due to its toughness and strength, S235 is suitable for bridge applications that require high resistance to loading.
  • Manufacturing of machine parts: It is also used for less stressed machine components and load-bearing parts of machines.
  • Containers: Structural steel S235 is an ideal material for the manufacturing of various types of containers due to its resistance to mechanical stress and easy adaptability to the requirements of specific applications.

It is important to note that this type of steel is not suitable for heat treatment, except for normalizing annealing, which is a process used to achieve optimal mechanical properties.

Mechanical Properties of Steel S235

Mechanical properties of material S235 are one of the main reasons for its wide use. The yield strength ranges from 195–235 MPa depending on the material thickness, while tensile strength reaches values between 360–510 MPa. These values provide structures with sufficient strength even when exposed to greater mechanical loading.

Another important property is its toughness, which allows it to absorb energy upon impact, thereby increasing the safety and reliability of structures. Steel S235 also has very good fatigue resistance, which means it is capable of withstanding repeated loading without risk of failure.

Advantages of Using Material S235

The use of steel S235 brings a number of advantages that make it a popular choice for many structural and industrial applications:

  1. High weldability: The material can be easily welded without the need for special procedures, which shortens production time and reduces costs.
  2. Universal use: Due to its properties, S235 is suitable for a wide range of applications, from construction to the manufacturing of machine parts.
  3. Availability: As one of the most common types of structural steel, S235 is easily available on the market.
  4. Cost-effectiveness: The combination of availability and easy processing makes it a cost-effective choice for many projects.
  5. Durability: The material provides long service life and high resistance to mechanical wear, which ensures the reliability of structures.

Summary

Steel S235 is an unalloyed structural steel hot-rolled, which is characterized by a minimum yield strength of 235 MPa, good weldability, toughness, and plasticity. Due to these properties, S235 is widely used in industrial sectors such as construction, manufacturing of machine parts, and containers. Its chemical composition and mechanical properties make it an ideal material for the manufacturing of durable and reliable structures.