EN 10210/S355 Seamless Steel Pipe Product Overview
EN 10210 S355 Seamless Pipes are thermomechanically rolled, carbon-manganese steel tubes engineered for bridges, offshore platforms, and cryogenic storage systems. With sub-grades like S355J2H (1.0570) and S355K2H, these pipes achieve 355–680 MPa tensile strength while maintaining ≥40J Charpy impact toughness at -20°C (-4°F). Certified to EN 10210-1, they replace ASTM A500 Gr.C in EN 1090-2-compliant projects requiring ±0.5% OD precision and S355JR-grade weldability without preheating.
Key Technical Specifications
1. Dimensional & Manufacturing Properties
- Size Range:
- Cold-Formed: 21.3 mm (0.84″) – 508 mm (20″) OD | Wall Thickness: 2.0–40 mm
- Hot-Finished: 508 mm – 1,200 mm (47″) OD | Wall Thickness: 10–100 mm
- Tolerances:
- OD: ±0.75% (hot-finished), ±0.5% (cold-formed)
- Ovality: ≤1.5% of nominal OD
- Surface Options:
- Shot-Blasted: Sa 2.5 finish for enhanced coating adhesion
- Galvanized: 85 µm zinc layer (EN ISO 1461)
2. Mechanical & Chemical Performance
Chemical Composition (Key Grades):
| Grade | C | Mn | P | S | Impact Test Temp. |
|---|---|---|---|---|---|
| S355J2H | ≤0.22% | ≤1.60% | ≤0.030% | ≤0.030% | -20°C |
| S355K2H | ≤0.22% | ≤1.60% | ≤0.030% | ≤0.030% | -50°C |
| S275J0H | ≤0.20% | ≤1.50% | ≤0.035% | ≤0.035% | 0°C |
Mechanical Properties:
| Grade | Yield (MPa) | Tensile (MPa) | Elongation (%) | Charpy V-Notch (J) |
|---|---|---|---|---|
| S355J2H | 355 | 510–680 | ≥22 | ≥27 @ -20°C |
| S355K2H | 355 | 510–680 | ≥22 | ≥40 @ -50°C |
| S275J0H | 275 | 410–560 | ≥23 | ≥27 @ 0°C |
Fatigue Strength:
| Stress Ratio | S355J2H @ 2M Cycles (MPa) | S355K2H @ 2M Cycles (MPa) |
|---|---|---|
| R = 0.1 | 260 | 290 |
| R = -1 | 155 | 175 |
Applications by Industry
| Industry | Use Case | Grade | Key Benefit |
|---|---|---|---|
| Offshore Oil | Subsea pipeline supports (-10°C) | S355K2H | -50°C impact compliance |
| Cryogenic | LNG storage tank frameworks | S355J2H | 27J @ -20°C toughness |
| Civil Engineering | Earthquake-resistant trusses | S355J0H | 680 MPa tensile strength |
| Crane Manufacturing | Telescopic boom sections | S355K2H + Shot-Blasted | Sa 2.5 surface for painting |
Global Standard Equivalents
| EN 10210 | ASTM | JIS | ISO |
|---|---|---|---|
| S355J2H | A500 Gr.C | STKR 490 | ISO 630 S355JR |
| S355K2H | A847 | STKM 18C | ISO 630 S355J0W |
Certifications & Compliance
- Processing: EN 10210-2 (Thermomechanical Rolling)
- Testing: Charpy Impact (EN ISO 148-1), Ultrasonic (EN 10246-3)
- Certifications: CE Marking (CPR), UKCA, NORSOK M-120
Packing And Delivery
