Q420FTD Wind Turbine Tower Steel Plate
This article introduces Q420FTD 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. Q420FTD is a high-strength low-alloy steel plate offering 420 MPa minimum yield, excellent toughness at -20°C (Grade D), and complies with GB/T 28410-2012 for wind tower construction in cold environments requiring higher load capacity.
📊 Q420FTD Approximate Grade Lookup Table
Chemical Composition (GB/T 28410-2012, mass fraction / %)
| Element | Value / Range |
|---|---|
| Grade | Q420FT D |
| C ≤ | 0.20 |
| Mn | 1.00 ~ 1.70 |
| P ≤ | 0.025 |
| S ≤ | 0.015 |
| Si ≤ | 0.50 |
| Nb ≤ | 0.060 |
| V ≤ | 0.15 |
| 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 | Q420FT D |
| Yield ReL ≥ (≤16 mm) | 420 MPa |
| Yield ReL ≥ (16~40 mm) | 400 MPa |
| Yield ReL ≥ (40~100 mm) | 390 MPa |
| Tensile Rm | 520 ~ 680 MPa |
| Elongation A ≥ | 19% |
| 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, 47J min)
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, 47J min)
Key Technical Specifications
- Standard: GB/T 28410-2012 (wind tower steel)
- Delivery: Normalized / TMCP / QT (fine-grain treatment)
- 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, 47J minimum
- Certification: EN 10204 3.1/3.2 mill certificate
Applications
- Tower shell sections for large-capacity wind turbines in cold climate zones
- Flanges, ring stiffeners, connection brackets for heavy-load designs requiring -20°C toughness
- Transition pieces and bottom sections for tall towers (100m+ hub height) in low-temperature regions
- Onshore and offshore wind power projects demanding 420 MPa yield with guaranteed subzero performance
Important: All technical data are based on GB/T 28410-2012 for Q420FTD. Final parameters should be confirmed in purchase order. Values may be adjusted for thickness. Grade D guarantees 47J minimum at -20°C.
For immediate inquiries, contact via WhatsApp. For detailed specs, visit the product page.
✅ Q420FTD (Grade D, -20°C impact, 47J) · GB/T 28410-2012 · Mill certificate included