DIN 17100 ST37/ST52 Carbon Steel Coil: High-Strength Structural Steel for Heavy-Duty Applications
Product Overview
DIN 17100 ST37/ST52 carbon steel coil is a non-alloy structural steel compliant with DIN 17100, EN 10025-2 S235JR/S355JR, and ASTM A36/A572. Designed for welded frameworks, bridges, and storage tanks, it delivers 235–365 MPa yield strength with 17–22% elongation and excellent cold-forming properties. Available in grades ST37 (general purpose) to ST52 (high-strength), it reduces fabrication costs by 15% compared to heat-treated steels while maintaining impact toughness down to -20°C.
Key Technical Specifications
1. Production & Dimensions
- Process:
- Hot-rolled: 2.75–100mm (±1.2% thickness tolerance)
- Cold-rolled: 0.2–3mm (±0.4% tolerance)
- Width: 45–2,200mm (compatible with CNC press brakes)
- Surface: Mill scale (Ra 12µm), wire-drawn (Ra 3.5µm), or laminated film (anti-scratch)
2. Chemical Composition
| Grade | C (≤) | Mn (≤) | Si (≤) | P (≤) | S (≤) | CEV (IIW) |
|---|---|---|---|---|---|---|
| ST37-2 | 0.20% | 0.60% | 0.40% | 0.050% | 0.050% | 0.28 |
| ST52-3 | 0.22% | 1.50% | 0.55% | 0.040% | 0.040% | 0.38 |
Trace elements: N ≤0.009% (ST37-2), Cu ≤0.30%
Mechanical Properties
| Grade | Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Impact (-20°C) |
|---|---|---|---|---|---|
| ST37-2 | ≤16 | 235 | 340–470 | 22 | 27J |
| ST52-3 | 16–40 | 355 | 490–630 | 18 | 34J |
Tested per DIN EN ISO 6892-1 (tensile) & DIN EN ISO 148-1 (Charpy V-notch)
Performance Advantages
- Cost-Efficient Fabrication:
- Bend radius: 2× thickness (DIN 6935 compliant).
- Welding speed: 1.3 m/min with E7016 electrodes (ST52-3, 15mm plate).
- Low-Temperature Resilience:
- Charpy V-notch: 34J at -20°C (ST52-3, 20mm thickness).
- Ideal for Baltic shipyard cranes and Alpine storage tanks.
- Corrosion Resistance:
- Atmospheric corrosion rate: 0.085 mm/year (ISO 9223 C3 environments).
- Compatible with epoxy coatings (250µm DFT).
- Thermal Stability:
- Thermal conductivity: 50 W/m·K (ST37-2 at 20°C).
- Expansion coefficient: 11.9 µm/m°C (20–150°C).
Applications by Grade
| Grade | Industry | Use Case |
|---|---|---|
| ST37-2 | Construction | Warehouse roof trusses |
| ST52-3 | Energy | Hydraulic turbine casings |
| ST37-3 | Transportation | Railcar undercarriages |
Global Equivalents
| DIN 17100 | EN 10025 | ASTM | JIS G3101 |
|---|---|---|---|
| ST37-2 | S235JR | A36 | SS400 |
| ST52-3 | S355JR | A572 Gr.50 | SM490YB |
Sustainability & Compliance
- Recycled Content: 82% (mill-certified)
- RoHS Compliance: Lead <0.008%, Mercury-free
- Certifications: CE Mark EN 1090-1, ISO 1461 (galvanized)
Packing And Delivery
