Q235FTE Wind Turbine Tower Steel Plate
Q235FTE is a specialized structural steel plate manufactured in accordance with GB/T 28410-2012, specifically designed for wind turbine tower construction requiring superior low-temperature toughness. This grade provides optimal strength, excellent weldability, and guaranteed impact properties at -40°C, making it ideal for wind power installations in extremely cold climate regions such as high-altitude or subarctic environments.
Chemical Composition (GB/T 28410-2012, Quality Fraction / %)
| Property | Value / Range |
|---|---|
| Grade | Q235FT E |
| C (Carbon) ≤ | 0.18 |
| Mn (Manganese) | 0.50 ~ 1.40 |
| P (Phosphorus) ≤ | 0.030 |
| S (Sulfur) ≤ | 0.025 |
| Si (Silicon) ≤ | 0.50 |
| Nb (Niobium) ≤ | 0.050 |
| V (Vanadium) ≤ | 0.060 |
| Ti (Titanium) ≤ | 0.050 |
| Mo (Molybdenum) ≤ | 0.10 |
| Cr (Chromium) ≤ | 0.30 |
| Ni (Nickel) ≤ | 0.30 |
| Cu (Copper) ≤ | 0.30 |
| Als (Acid-soluble Aluminum) ≥ | 0.015 |
| N (Nitrogen) ≤ | 0.012 |
Note: The lower limit of Mn content for steel plates delivered in normalized condition shall be as specified in the table. No lower limit of Mn content shall be required for steel plates delivered in other conditions.
Mechanical Properties & Processing Characteristics (GB/T 28410-2012)
| Property | Value / Specification |
|---|---|
| Grade | Q235FT E |
| Yield Strength (ReL) ≥ Thickness ≤ 16mm |
235 N/mm² |
| Yield Strength (ReL) ≥ Thickness ＞ 16~40mm |
225 N/mm² |
| Yield Strength (ReL) ≥ Thickness ＞ 40~100mm |
215 N/mm² |
| Tensile Strength (Rm) | 360 ~ 510 N/mm² |
| Elongation after Fracture (A) ≥ | 24% |
| Impact Energy (KV2) ≥ | 34 J (at -40°C) |
| Bending Test (180°) Thickness ≤ 16mm |
d = 2a |
| Bending Test (180°) Thickness ＞ 16~100mm |
d = 3a |
Notes:
1. When yield strength is not significant, Rp0.2 can be used instead of lower yield strength.
2. When the thickness is > 60mm, the elongation after fracture can be reduced by 1%.
3. The impact test uses longitudinal specimens.
4. Impact test temperatures corresponding to different quality grades: B: 20℃, C: 0℃, D: -20℃, E: -40℃, F: -50℃.
1. When yield strength is not significant, Rp0.2 can be used instead of lower yield strength.
2. When the thickness is > 60mm, the elongation after fracture can be reduced by 1%.
3. The impact test uses longitudinal specimens.
4. Impact test temperatures corresponding to different quality grades: B: 20℃, C: 0℃, D: -20℃, E: -40℃, F: -50℃.
Key Technical Specifications
- Primary Standard: GB/T 28410-2012 (Base Plate for Wind Tower)
- Product Form: Hot-rolled steel plate, available in normalized or TMCP condition.
- Typical Dimensions:
- Thickness: 8 - 100mm (Standard range, wider availability upon request)
- Width: Up to 5,300mm
- Length: Up to 12,000mm or as required
- Tolerances: In accordance with GB/T 709 or DIN EN 10029, as specified.
- Impact Temperature: Grade E (-40℃) as per table. Grades C (0℃), D (-20℃), and F (-50℃) also available upon request with adjusted chemical composition.
- Certification: Supplied with Mill Test Certificate EN 10204 Type 3.1/3.2.
Applications
Q235FTE is specifically designed for wind turbine tower components requiring reliable service in extremely low-temperature environments:
- Tower cylindrical and conical sections for arctic and high-altitude wind farms
- Flange rings and structural connections requiring -40°C impact certification
- Internal platform and ladder supports in cold climate zones
- Offshore wind power structures subject to severe cold conditions
Important: All technical data are based on GB/T 28410-2012 standard requirements for Q235FTE grade. Specific technical parameters should be confirmed in the purchase order and accompanying technical agreement. Values may be adjusted for different thickness ranges and impact temperature requirements.
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