A572 Gr50 beams and S355JR beams are both widely used high-strength low-alloy (HSLA) structural steel beams, commonly applied in buildings, bridges, and industrial structures.
- A572 Gr50 minimum yield strength: 345 MPa
- S355JR minimum yield strength: 355 MPa
From a strength perspective, S355JR beams are generally considered equivalent to A572 Gr50 beams, though they are produced under different standards and alloying concepts.
S355JR Beams vs A572 Gr50 Beams
Chemical Composition (Heat Analysis, Max %)
| Standard | Grade | C | Mn | P | S | Si | N | Cu |
|---|---|---|---|---|---|---|---|---|
| EN 10025-2 | S355JR | 0.24 | 1.60 | 0.035 | 0.035 | 0.55 | 0.012 | 0.55 |
| ASTM A572/A572M | A572 Gr50 | 0.23 | 1.35 | 0.040 | 0.050 | 0.40 | – | – |
Mechanical Properties of Beams
For Beam Flange/Web Thickness ≤ 16 mm
| Standard | Grade | Yield Strength (MPa) | Tensile Strength (MPa) |
|---|---|---|---|
| EN 10025-2 | S355JR Beams | ≥355 | 470–630 |
| ASTM A572/A572M | A572 Gr50 Beams | ≥345 | ≥450 |
Application Comparison
S355JR Beams
- European steel structures
- Commercial and residential buildings
- Machinery frames and industrial platforms
- Projects requiring EN standard compliance
A572 Gr50 Beams
- American-standard buildings and bridges
- Infrastructure and heavy structures
- Steel frames requiring ASTM compliance
- Cost-effective wide-flange beam solutions
What is S355JR equivalent to?
S355JR equivalent grades have very close chemical composition and mechanical properties to that of S355JR steel. Both the S355JR equivalent grades Q345B, A572 Gr 50, ST52-3.
What is material specification S355JR?
Grade S355JR has a minimum yield strength of 355 MPa. The impact energy at a room temperature of 20°C is at least 27 joules.
What is the difference between S275JR and S355JR?
S275JR: Offers a minimum yield strength of 275 MPa for thicknesses up to 16 mm. This makes it suitable for applications where moderate strength is sufficient. S355JR: Provides a higher minimum yield strength of 355 MPa for thicknesses up to 16 mm, making it ideal for projects requiring greater load-bearing capacity.
What material is EN 10025 2 S355JR?
S355JR steel is one mainly of Carbon and low alloy steel, S355JR steel is a type of steel sheet under EN standard which is used to build ship, bridge, belongs to high strength sheet. EN 10025-2 is the Standard Specification Technical Delivery Conditions for Non-Alloy Structural steels.
Is S235JR a mild steel?
S235jr steel is a mild steel, its carbon composition below 2%. So the S235JR Mild steel have very good welding performance. For S235JR, we supply the steel plate, steel round bar, steel hexagonal bar, flat bar, square bar and pipe.