S235 is a carbon structural steel. It is a steel number of European standards, in line with European standards, and belongs to carbon structural steel with low carbon content, which can be used for welding and bolted connection. S235 carbon structural steel can be replaced with domestic Q235 carbon steel, because their carbon content is relatively low chemical properties are close, mainly used in buildings, Bridges, ships, vehicles and other structural parts.

S275JR (European standard) Engineering and structural steel General carbon structural steel form: steel bar, steel plate, steel strip, wire, forging Executive standard: EN10025 (1994) This kind of steel is similar to the steel numbers listed in GB/T700 and GB/T1591 in China, and is also carbon structural steel and low alloy structural steel for engineering and structural steel, usually delivered without heat treatment. S275 is equivalent to Q275.

S355JR steel plate is a common structural steel plate, widely used in construction, machinery manufacturing, automobile manufacturing and other industries. It has excellent mechanical properties and corrosion resistance and is suitable for a variety of heavy-duty and high-strength engineering applications.S355JR is a low alloy high strength structural steel in accordance with the European standard EN10025. S355JR steel in China is a low-alloy high-strength structural steel with a hardness of 70-80B and a yield strength between 300-400MPa.

Surface classification

Common grade Surface (FA)

The surface of the pickling surface is allowed to have a depth (or height) not more than half of the thickness tolerance of the steel plate pitting, concave, scratches and other minor, local defects, but should ensure that the minimum allowable thickness of the steel plate and steel strip.

Higher Surface (FB)

The pickling surface is allowed to have local defects that do not affect the formability, such as slight scratches, slight indentation, slight pitting, slight roll marks and color difference.

Product information:

 S275JR  Chemical composition (%):

Yield strength（MPa） :≥225

Tensile strength （MPa）:360~510

Elongation (%) ≥18

S235JR is the European standard of non-alloy structural steel, equivalent to the national standard Q235B, that is, carbon structural steel with low carbon content, which is used for welding, bolted and riveted structures.

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 S275JR  Chemical composition (%):

The S275JR steel plate is a general carbon structural steel, which is similar to the steel number listed in GB/T700 and GB/T1591 in China, and is also a carbon structural steel and low alloy structural steel for engineering and structural steel, usually delivered without heat treatment.

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 S355JR  Chemical composition (%):

S355JR, S355J0 and S355J2 are the three main products of European standard H-beam steel. They have certain differences in material, but they all have good mechanical properties and service life. S355JR is a low carbon alloy structural steel, its chemical composition contains an appropriate amount of silicon manganese, phosphorus, sulfur and other elements.