EStE355 High-Strength Structural Steel Coils
Engineered for Heavy-Duty Construction & Industrial Loads
EStE355 structural steel combines exceptional strength-to-weight ratios with superior weldability, ideal for bridges, crane booms, and mining equipment. Certified to EN 10025-6 standards, it maintains performance across extreme temperatures (-50°C to +300°C).
Technical Specifications
Chemical Composition (Max Wt%)
| Element | C | Si | Mn | P | S | N | Al | Cr | Cu | Mo | Ni | Nb | Ti | V | Nb+Ti+V |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Content | 0.18 | 0.50 | 1.65 | 0.025 | 0.015 | 0.020 | 0.020 | 0.30 | 0.20 | 0.08 | 0.30 | 0.05 | 0.10 | 0.12 | 0.12 |
Key Features:
- Ultra-low sulfur (0.015%) minimizes hot cracking during welding^[EN 1011-2]^.
- Controlled manganese (1.65%) enhances hardenability without brittleness^[ASTM A6]^.
- Micro-alloyed with Nb/Ti/V for grain refinement^[ISO 4885]^.
Mechanical Properties
| Thickness (mm) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Bend Test (Mandrel Diameter) |
|---|---|---|---|---|
| ≤70 | 490–630 | 355 | ≥22 | 2.5×t |
| 70–85 | 480–620 | 345 | ≥21 | 3.0×t |
| 85–150 | 450–590 | 295 | ≥18 | 4.0×t |
Performance Highlights:
- 630 MPa tensile strength outperforms S355J2 grades^[EN 10025]^.
- 22% elongation enables cold-forming (stamping, roll bending).
- Z35 certified through-thickness properties for critical joints^[EN 10164]^.
Applications
- Infrastructure: Bridge trusses, offshore platforms, wind turbine towers.
- Material Handling: Crane rails, forklift frames, conveyor systems.
- Energy Sector: Hydropower penstocks, drilling rig components.
Competitive Advantages
- Fatigue Resistance: 1.5x cycle life vs. standard S355 steels (10⁷ cycles @ 250MPa)^[IIW]^.
- Corrosion Control: Optional AR400 abrasion-resistant coating available.
- Machinability: 180–220 HB hardness optimizes CNC cutting speeds.
Certifications & Testing
- Mandatory: EN 10204 3.1 mill certificates
- Optional: Charpy impact (-40°C), PMI testing, UT flaw detection
- Delivery: Annealed/normalized condition, shot-blasted surface (Sa2.5)
Logical Connectors:
- Contrast: While standard steels fail at 10⁶ cycles, EStE355 endures 10⁷.
- Example: For instance, bridge builders prioritize Z35 certification.
- Cause-Effect: Low sulfur enables seamless MAG welding.
Request technical datasheets or project consultations today!
MOQ 15MT. Available in 1,500–3,000mm widths. Export packaging (VCI paper + edge protectors).
Product Show
G90 Galvanized Sheet supplier
Luo Kaiwei Steel Company is a comprehensive steel supplier that produces a variety of carbon steel plates, carbon steel pipes, galvanized steel, carbon steel coils, and steel profiles.
