Preheating treatment of S460 steel

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In some cases, it is better to perform a pre-heating treatment on steel. This is often related to strengthening it for a specific application, such as building heavy bridges, for example. There are many more advantages to pre-heating steel. Learn more about it and read this article on pre-heating S460 steel.

What does the S stand for in S460 steel?

The ‘S’ in S460 steel stands for ‘structural’, indicating that the steel is used in construction applications. S460 refers to a specific class of structural steel with a minimum yield strength of 460 MegaPascals (MPa). This type of steel is often used in heavy constructions such as bridges, buildings, and other structures where high strength is required.

How is S460 steel exactly made?

S460 steel is a high-quality structural steel composed of various elements to enhance its strength, toughness, and weldability. The exact composition can vary depending on the manufacturer and specific application requirements, but the main components typically include:

  • Iron (Fe): The primary base component of S460 steel.
  • Carbon (C): Usually less than 0.20%. Carbon increases the steel’s strength and hardness, but too much can reduce weldability.
  • Manganese (Mn): An important element, often in the order of 1-2%, which improves strength and toughness.
  • Silicon (Si): Around 0.5% or less, it helps strengthen the steel and improves its elastic properties.
  • Phosphorus (P) and Sulfur (S): These elements are undesirable in high concentrations as they can reduce the steel’s strength and toughness. They are usually limited to less than 0.05%.
  • Chromium (Cr), Nickel (Ni), and Molybdenum (Mo): These alloying elements may be present in small amounts to improve corrosion resistance and other mechanical properties.
  • Nitrogen (N), Copper (Cu), and other elements: These may be present in very small amounts depending on the specific steel grade and manufacturing process.

The precise composition of S460 steel is carefully regulated to achieve the desired mechanical properties, such as high strength, good toughness, and good weldability, which are essential for its use in construction applications.

In which situations the mechanical properties of S460 need to be improved?

The mechanical properties of S460 steel may need to be improved or modified in certain situations to meet specific requirements or applications. This may be necessary in circumstances where:

Extreme loads

For structures subject to high loads or stress, such as heavy bridges, high-rise buildings, or offshore structures, it may be necessary to improve the strength and stiffness of the steel.

Harsh weather conditions

In areas with extreme weather conditions, such as very cold or corrosive environments, adjustments may be required to enhance the toughness at low temperatures or the corrosion resistance.


For complex constructions where extensive welding is needed, it may be necessary to optimize the steel’s weldability to prevent cracking or weak weld seams.
High impact or shock loads: In situations where the steel is exposed to high impact or shock loads, such as in certain types of transport infrastructure or earthquake-resistant buildings, it is important for the steel to have sufficient toughness to withstand such forces without breaking.

Weight restrictions

In some applications, such as in the construction of cranes or certain types of vehicles, it may be necessary to optimize the steel’s weight ratio to reduce the overall weight of the construction.

The power of Delta Heat Services

You can find different heat treatments at Delta Heat Services. It’s all covered under Electrical Heat Treatment or Induction Heating. Ask us what’s the best for your s460 steel or other types of steel. Our heat treatment experts can provide you with all the necessary advice. In addition to that, you can also purchase or rent the required equipment from us. Please fill in our contact form and get personal advice about the heat treatments of s460 steel or another piece that needs it.

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