S355JR square tubing is a commonly used structural steel in Europe, possessing a good balance of strength and toughness. Its hardness typically ranges from 130-160 HB, making it suitable for welding and machining. This type of steel is widely used in construction, bridge building, and machinery manufacturing, and is favored due to its excellent overall performance.
S: Indicates the steel plate is European standard structural steel.
355: Indicates the steel plate's yield strength is not less than 355 MPa.
J: Indicates the steel plate's delivery quality.
R: No impact testing, corresponding to national standard grade B (later changed to room temperature impact, i.e., 20 degrees Celsius impact).
Chemical Composition:
The chemical composition of S355JR steel plate is as follows:
Grade: S355JR
C: ≤0.22%
Si: ≤0.55%
Mn: ≤1.60%
P: ≤0.025%
S: ≤0.025%
N: ≤0.012%
Cu: ≤0.55%
Mechanical Properties
Hardness: 70-80B
Yield Strength: Between 300-400MPa
S355JR thickness ranges from 0-250mm. Thicknesses above 80mm, especially 100mm and 120mm, are more demanding in terms of manufacturing processes. As the thickness increases, the strength and impact resistance of the steel plate decrease.
S355JR RHS Tube factory
