S355JR is a low-alloy high-strength structural steel that complies with European standards

S355JR is a low-alloy high-strength structural steel that complies with European standards (EN 10025). Among them, "S" means structural steel, "355" means its minimum yield strength is 355MPa, and "JR" means its impact toughness level. Specifically, JR represents an impact energy of 27 Joules at 20°C, which is an important indicator for steel to maintain good toughness in low-temperature environments. S355JR steel plate has excellent mechanical properties and welding properties, so it is widely used in construction, pidges, ships, vehicles, pressure vessels and other fields. Its density is approximately 7.85 g/cm³ and its melting point range is between 1450-1530°C.

The general range of chemical composition of S355JR is as follows:

C	Si	Mn	P	S	Cu
0.12~0.24%	0.20~0.60% or 0.10~0.55%	1.20~1.60% or 0.60~1.60%	0.025%	0.025%	0.55%

The production method of S355JR mainly includes the following steps: steelmaking, continuous casting, finishing, rolling, rolling mill cooling, and steel plate surface treatment. Through the above steps, the production of S355JR steel plate can be completed.

The characteristics of S355JR steel plate mainly include the following aspects:

1. High strength: S355JR steel plate has high yield strength and tensile strength. Its minimum yield strength is as high as 355MPa. It can withstand various complex loads and stresses to ensure the safety and stability of the structure.

2. Good toughness: S355JR steel plate can maintain its shape and performance when subjected to impact or vipation, and has good toughness.

3. Excellent welding performance: S355JR steel plate is easy to undergo various welding processes, such as manual arc welding, submerged arc welding, gas shielded welding, etc., which provides engineers and designers with more design flexibility.

4. Good corrosion resistance: S355JR steel plate has good corrosion resistance in general atmospheric environments and can meet the use requirements of most structural parts, allowing it to be used in a variety of environmental conditions, including moisture, corrosiveness, etc. Harsh environment.

5. Good processability: S355JR steel plate has good cold working and hot working properties, and is easy to perform cutting, bending, forming and other processing operations.

The application range of S355JR steel plates is very wide, mainly including the following fields: Construction field: S355JR steel plates are commonly used in beams, columns, floor slabs and other parts of building structures such as high-rise buildings, factories, and pidges. Ship field: S355JR steel plates are used in the production of ship decks, bulkheads, trusses and other structural components. Vehicle field: S355JR steel plates play an important role in the manufacturing of chassis, frames and other components of cars, trains, trucks and other vehicles. S355JR steel plates are used to manufacture rail transit equipment such as subway vehicles and high-speed trains. Machinery manufacturing field: S355JR steel plates are used to manufacture various equipment shells, packets and other structural parts. pidge engineering: S355JR steel plate is used as main beam material.