Q345FTD Wind Turbine Tower Steel Plate
This article introduces Q345FTD structural steel for wind turbine towers manufactured by Chinese steel mills, hoping to meet your needs and encourage you to purchase this grade of steel. Q345FTD provides 345 MPa minimum yield, excellent toughness at -20°C (Grade D), and complies with GB/T 28410-2012 for wind tower construction in colder environments.
📊 Q345FTD Approximate Grade Lookup Table
Chemical Composition (GB/T 28410-2012, mass fraction / %)
| Element | Value / Range |
|---|---|
| Grade | Q345FT D |
| C ≤ | 0.20 |
| Mn | 0.90 ~ 1.65 |
| P ≤ | 0.025 |
| S ≤ | 0.015 |
| Si ≤ | 0.50 |
| Nb ≤ | 0.060 |
| V ≤ | 0.12 |
| Ti ≤ | 0.050 |
| Mo ≤ | 0.20 |
| Cr ≤ | 0.30 |
| Ni ≤ | 0.50 |
| Cu ≤ | 0.30 |
| Als ≥ | 0.015 |
| N ≤ | 0.012 |
Note: The lower limit of Mn content for normalized delivery shall be as specified in the table. No lower limit required for other conditions.
Mechanical Properties & Processing (GB/T 28410-2012)
| Property | Specification |
|---|---|
| Grade | Q345FT D |
| Yield ReL ≥ (≤16 mm) | 345 MPa |
| Yield ReL ≥ (16~40 mm) | 335 MPa |
| Yield ReL ≥ (40~100 mm) | 325 MPa |
| Tensile Rm | 470 ~ 630 MPa |
| Elongation A ≥ | 21% |
| Impact KV2 (Grade D, -20°C) ≥ | 47 J |
| Bending 180° (thickness ≤16 mm) | d = 2a |
| Bending 180° (thickness 16~100 mm) | d = 3a |
Notes:
1. When yield is not significant, Rp0.2 may be used.
2. For thickness >60 mm, elongation may be reduced by 1%.
3. Impact test uses longitudinal specimens.
4. Impact temperature by grade: B 20°C, C 0°C, D -20°C, E -40°C, F -50°C. (Grade D offers -20°C impact)
1. When yield is not significant, Rp0.2 may be used.
2. For thickness >60 mm, elongation may be reduced by 1%.
3. Impact test uses longitudinal specimens.
4. Impact temperature by grade: B 20°C, C 0°C, D -20°C, E -40°C, F -50°C. (Grade D offers -20°C impact)
Key Technical Specifications
- Standard: GB/T 28410-2012 (wind tower steel)
- Delivery: Normalized / TMCP / QT
- Thickness: 8–100 mm (custom up to 150 mm available)
- Width: up to 5300 mm; Length: up to 12000 mm
- Impact grade: D (-20°C) standard as delivered, others optional
- Certification: EN 10204 3.1/3.2 mill certificate
Applications
- Tower shell sections for onshore/offshore wind turbines in cold climate zones
- Flanges, ring stiffeners, connection brackets requiring -20°C impact toughness
- Internal platforms, ladder supports, door frames in low-temperature service
- Transition pieces and bottom sections for wind towers in regions with subzero conditions
Important: All technical data are based on GB/T 28410-2012 for Q345FTD. Final parameters should be confirmed in purchase order. Values may be adjusted for thickness and impact temperature. Grade D guarantees 47J minimum at -20°C.
For immediate inquiries, contact via WhatsApp. For detailed specs, visit the product page.
✅ Q345FTD (Grade D, -20°C impact) · GB/T 28410-2012 · Mill certificate included