S235JR is a European standard non-alloy structural steel, equivalent to the national standard Q235B, which is a carbon structural steel with low carbon content. It is used for welding, bolting and riveting structures.
Carbon structural steel is a kind of carbon steel. The carbon content is about 0.05%~0.70%, and some can be as high as 0.90%. It can be divided into ordinary carbon structural steel and high-quality carbon structural steel. It is widely used in railway, bridge, various construction projects, manufacturing various metal components that bear static load, unimportant mechanical parts and general weldments that do not need heat treatment.
The grade of S235JR steel plate indicates
“S”: European standard ordinary carbon structural steel;
“235″: yield strength is 235, unit: MPa;
“JR”: impact at normal temperature
3. S235JR steel plate executive standard: EN10025 standard
4. Delivery status of S235JR steel plate: hot rolling, controlled rolling, normalizing, etc. The delivery status can also be specified according to technical requirements.
5. S235JR steel plate thickness direction performance requirements: Z15, Z25, Z35.
Chemical composition analysis of S235JR steel plate
S235JR Chemical composition:
S235JR steel plate carbon content C: ≤ 0.17
S235JR steel plate silicon content Si: ≤ 0.35
S235JR steel plate manganese content Mn: ≤ 0.65
Phosphorus content of S235JR steel plate P: ≤ 0.030
S235JR steel plate sulfur content S: ≤ 0.030
3、 Mechanical properties of S235JR steel plate
Thickness 8-420mm:
Yield strength MPa: ≥ 225
Tensile strength MPa: 360 ～ 510
Elongation%: ≥ 18
4、 S235JR steel plate production process:
Production process flow: electric furnace smelting → LF/VD furnace essence → casting → ingot cleaning → ingot heating → plate rolling → finishing → cutting sampling → performance inspection → warehousing
5、 S235JR steel plate size introduction thickness
8-50mm*1600-2200mm*6000-10000mm
50-100mm*1600-2200mm*6000-12000mm
100-200mm*2000-3000mm*10000-14000mm
200-350mm*2200-4020mm*10000-18800mm
Surface classification
Ordinary surface (FA)
The pickled surface is allowed to have slight and local defects such as pits, dents, scratches, etc. whose depth (or height) does not exceed half of the thickness tolerance of the steel plate, but the minimum allowable thickness of the steel plate and steel strip shall be guaranteed.
Higher surface (FB)
The pickling surface is allowed to have local defects that do not affect the formability, such as slight scratches, slight indentations, slight pits, slight roller marks and color differences.
Material usage
It is mainly used for building, bridge, ship, vehicle structural parts, manufacturing various tools, cutting tools, molds and measuring tools.
Post time: Feb-09-2023
