What type of steel is S355?
S355J2 steel is a carbon manganese ,high yield non alloy steel. It is called S355 because of the average minimum yield for this material is 355 Mpa.As a structural steel,it has excellent strength and weldability.It can be readily welded to other weldable steel. For its low carbon equivalent, it possesses good cold-forming properties. S355J2 is generally supplied in a normalized condition.
S355j2 Chemical Composition & Related Specifications
|S355J2G3||≤ 0.22||≤0.55||≤1.6||≤ 0.035||≤ 0.035|
|ST52-3 / 1.0570||En14A / 150M19||16Mn||SM 490|
|S355||JR||Charpy impact tests at room temperature 20°C|
|J0||Charpy impact tests at 0°C|
|J2||Charpy impact tests at -20°C|
|S355J2||N||Supply condition normalised|
|G3||Supply condition normalised|
|Thickness ,mm||≤ 16||16-40||40-63||63-80||80-100||100-150||150-200||200-350||> 250|
|Yield strength,Mpa||≥ 355||≥ 345||≥ 335||≥ 325||≥ 315||≥ 295||≥ 285||≥ 275||≥ 265|
|Impact,J||J2: 27J at – 20°C|
Normalizing is used to refine the structure of forgings that might have cooled non-uniformly after forged,and considered as a conditioning treatment before final heat treatment.Normalizing temperature for S355J2 steel should be carried out between 890℃-950℃. hold suitable time for the steel to be thoroughly heated to complete the ferrite to austenite transformation.Cool in still air.
S355J2 is a low carbon structural steel grade often used for application which require better mechanical properties than that of S275 and S235 grade.It is widely used in engineering and construction industries.