EN10025 S355JR Structural steel chemical composition

EN10025 S355JR carbon steel is a structural steel grade that is used in various industries such as construction, engineering, and manufacturing. S355JR carbon structural steel is primarily used for the manufacture of heavy-duty structures such as bridges, buildings, and offshore structures due to its high strength and excellent corrosion resistance properties.

The chemical composition of EN10025 S355JR Structural steel is as follows:

Carbon - 0.24% max
Manganese - 1.60% max
Silicon - 0.55% max
Phosphorus - 0.040% max
Sulfur - 0.040% max
Nitrogen - 0.012% max
Copper - 0.55% max

Carbon is one of the most important elements in steel composition. It provides strength and hardness to the material. The carbon content in EN10025 S355JR steel is 0.24% max.

The manganese content in S355JR carbon structural steel is 1.60% max. Manganese is another important element in the composition of structural steel. Its main function is to improve the toughness of the material. Toughness is the ability of a material to absorb energy without fracturing. Manganese improves the toughness of steel by reducing the formation of brittle microstructures during the cooling of the material.

Silicon is an element that is added to steel to improve its resistance to high temperatures. particularly at high temperatures where the steel is exposed to thermal stress, It also helps to improve the strength of the material. The silicon content in EN10025 S355JR steel is 0.55% max.

Phosphorus and sulfur are impurities that can have a negative impact on the properties of steel. High levels of phosphorus and sulfur can cause the steel to become brittle at low temperatures, reducing its impact resistance and increasing the risk of fracture. The phosphorus and sulfur content in EN10025 S355JR steel is 0.040% max.

Nitrogen is a non-metallic element that can improve the strength and toughness of steel. The nitrogen content in EN10025 S355JR steel is 0.012% max.

Copper is an element that is added to steel to improve its resistance to corrosion. The copper content in EN10025 S355JR steel is 0.55% max.

The chemical composition of S355JR Carbon and Low-alloy Structural steel has a direct impact on the physical and mechanical properties of the material. The strength and hardness of the steel are primarily influenced by the carbon content. A higher carbon content will result in greater strength and hardness, while a lower carbon content will result in lower strength and hardness.