Q420FTF Wind Turbine Tower Steel Plate
This article introduces Q420FTF 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. Q420FTF is a high-strength low-alloy steel plate offering 420 MPa minimum yield, the highest low-temperature toughness at -50°C (Grade F, 34J), and complies with GB/T 28410-2012 for wind tower construction in extreme arctic environments requiring maximum cold resistance.
📊 Q420FTF Approximate Grade Lookup Table
Chemical Composition (GB/T 28410-2012, mass fraction / %)
| Element | Value / Range |
|---|---|
| Grade | Q420FT F |
| C ≤ | 0.20 |
| Mn | 1.00 ~ 1.70 |
| P ≤ | 0.020 |
| S ≤ | 0.010 |
| 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 ≤ | 0.010 |
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 F |
| 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 F, -50°C) ≥ | 34 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 F offers -50°C impact, 34J 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 F offers -50°C impact, 34J min)
Key Technical Specifications
- Standard: GB/T 28410-2012 (wind tower steel)
- Delivery: Normalized / TMCP / QT (fine-grain treatment for extreme low-temp)
- Thickness: 8–100 mm (custom up to 150 mm available)
- Width: up to 5300 mm; Length: up to 12000 mm
- Impact grade: F (-50°C) standard, 34J minimum (highest toughness level)
- Certification: EN 10204 3.1/3.2 mill certificate
Applications
- Tower shell sections for large-capacity wind turbines in Arctic and Antarctic regions
- Flanges, ring stiffeners, connection brackets requiring -50°C impact toughness at 420 MPa strength
- Offshore wind towers in polar environments and ice-resistant structures
- Critical load-bearing components for extremely low-temperature service below -40°C
Important: All technical data are based on GB/T 28410-2012 for Q420FTF. Final parameters should be confirmed in purchase order. Values may be adjusted for thickness. Grade F guarantees 34J minimum at -50°C, the highest toughness level for wind tower steel.
For immediate inquiries, contact via WhatsApp. For detailed specs, visit the product page.
✅ Q420FTF (Grade F, -50°C impact, 34J) · GB/T 28410-2012 · Mill certificate included