Introduction to EN10025-2 S355JR Non-Alloy Structural Steel Plate

​EN10025-2 S355JR is a non-alloy structural steel grade that is widely used in various construction and engineering applications. This grade is a popular choice for a wide range of structural applications due to its excellent mechanical properties and cost-effectiveness. Below is a detailed overview of the chemical composition, mechanical properties, heat treatment conditions, low-temperature impact testing, available size range, primary applications, and related supply cases from TJC Steel Group.
Chemical Composition:
The chemical composition of S355JR is carefully controlled to ensure that the steel meets the required mechanical properties. The typical chemical composition is as follows:

• Carbon (C): ≤ 0.24%
• Silicon (Si): ≤ 0.55%
• Manganese (Mn): ≤ 1.60%
• Phosphorus (P): ≤ 0.045%
• Sulfur (S): ≤ 0.045%
• Copper (Cu): ≤ 0.55%
• Nickel (Ni): ≤ 0.55%
• Chromium (Cr): ≤ 0.30%
• Molybdenum (Mo): ≤ 0.10%
• Niobium (Nb): ≤ 0.05%
• Titanium (Ti): ≤ 0.04%
• Vanadium (V): ≤ 0.12%

Mechanical Properties:
The mechanical properties of S355JR are as follows:

• Yield Strength: ≥ 355 MPa
• Tensile Strength: 470 - 630 MPa
• Elongation: ≥ 22%
• Impact Energy (Longitudinal): ≥ 27 Joules at -20°C

Heat Treatment Conditions:
S355JR steel plates are generally supplied in the untreated or normalized condition. Normalizing improves the mechanical properties of the steel, especially the toughness, and is often performed after hot rolling.
Low-Temperature Impact Test:
The steel is subjected to a low-temperature impact test to ensure that it maintains its toughness at sub-zero temperatures. The minimum impact energy value is measured at -20°C, ensuring the steel's suitability for use in cold environments.
Available Size Range:
TJC Steel Group offers S355JR structural steel plates in a wide range of sizes to meet the demands of various projects. The typical thickness range is from 6mm to 200mm, with widths up to 3500mm and lengths up to 12000mm.
Primary Applications:
S355JR steel plates are commonly used in the following applications:

• General Construction
• Infrastructure Development
• Shipbuilding
• Mechanical Equipment Manufacturing
• Offshore Structures
• Power Plants
• Mining and Earthmoving Equipment

Related Supply Cases from TJC Steel Group:
TJC Steel Group has supplied S355JR steel plates for numerous projects across various industries. One notable supply case involved the construction of a major bridge, where TJC provided over 5,000 tons of S355JR plates for the main structural components. The steel's high strength and excellent toughness were crucial for ensuring the bridge's durability and safety.
Another case saw TJC supplying S355JR plates for a power plant project in Europe, where the steel's ability to withstand high temperatures and pressures was essential. TJC's ability to deliver large quantities of steel with consistent quality and on-time delivery was highly appreciated by the client.
In conclusion, EN10025-2 S355JR is a versatile and reliable structural steel grade that is well-suited for a wide range of applications. TJC Steel Group's extensive experience in supplying S355JR plates ensures that clients receive high-quality steel that meets their specific project requirements.