Q550FTE Wind Power Steel
High-Strength Arctic Grade – 550MPa Grade / 460MPa Yield, Guaranteed -40°C Impact Toughness (34J) for Arctic Large Wind Towers
Product Overview
This article introduces Q550FTE 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. Q550FTE is a high-strength low-alloy steel plate offering minimum yield strength of 460 MPa (≤16mm), excellent toughness at -40°C (Grade E, 34J), and complies with GB/T 28410-2012 for wind tower construction in extremely cold environments requiring enhanced load capacity.
Q550FTE (Grade E) is a high-strength low-alloy structural steel plate specifically designed for large wind power generation equipment requiring superior load-bearing capacity and extreme low-temperature toughness for arctic conditions.
Key Advantages
- High Strength + Extreme Cold Toughness: Minimum yield strength of 460MPa (≤16mm) combined with guaranteed -40°C impact toughness (34J).
- Optimized for Arctic Climates: Designed for large wind towers operating in arctic and subarctic regions.
- Excellent Weldability: Optimized chemical composition with low carbon equivalent ensures reliable fabrication.
- Cost-Effective Arctic Solution: High strength allows for lighter tower designs, reducing material costs.
International Grade Comparison
Domestic Grade Comparison: Q460FTE / Q550FTD / Q620FTE
Yield: ≥420MPa
Tensile: 520-680MPa
Impact: 34J
Yield: ≥460MPa
Tensile: 670-830MPa
Impact: 34J
Yield: ≥460MPa
Tensile: 670-830MPa
Impact: 34J
Yield: ≥550MPa
Tensile: 700-880MPa
Impact: 34J
Technical Specifications
Q550FTE Chemical Composition (GB/T 28410-2012, wt%)
| Element | Value / Range |
|---|---|
| C (max) | 0.20 |
| Mn | ≤1.80 |
| P (max) | 0.020 |
| S (max) | 0.010 |
| Si (max) | 0.60 |
| Nb (max) | 0.070 |
| V (max) | 0.15 |
| Ti (max) | 0.050 |
| Mo (max) | 0.50 |
| Cr (max) | 0.80 |
| Ni (max) | 0.80 |
| Cu (max) | 0.80 |
| Als (min) | 0.015 |
| N (max) | 0.010 |
Q550FTE Mechanical Properties (GB/T 28410-2012)
| Property | Value |
|---|---|
| Yield (≤16mm) | 460 MPa |
| Yield (16-40mm) | 440 MPa |
| Yield (40-100mm) | 420 MPa |
| Tensile | 670-830 MPa |
| Elongation | 16% (min) |
| Impact (-40°C) | 34 J (min) |
| Bending (≤16mm) | d=2a |
| Bending (16-100mm) | d=3a |
Q550FTE Size & Specification
| Parameter | Plate | Coil |
|---|---|---|
| Thickness | 8-150mm | 2.0-12.0mm |
| Width | 1500-5300mm | 900-2000mm |
| Length | 6000-12000mm | ID 508/610 |
| Delivery | Normalized / TMCP / QT | |
Applications
Arctic & Subarctic Large Wind Turbine Towers
Primary application for Q550FTE, offering high strength (460MPa yield) and extreme -40°C impact toughness for large wind turbine tower structures in arctic and subarctic regions.
- Tower shell sections for arctic and subarctic wind farms
- Flanges, ring stiffeners requiring -40°C impact certification
- Transition pieces for tall towers in extremely cold environments
- Offshore wind projects in polar seas
Available Supply Range
📏 Thickness
- Plates: 8-150mm
- Coils: 2.0-12.0mm
📐 Width & Length
- Width: 900-5300mm
- Length: 6000-12000mm
Custom Fabrication Services
Custom Cutting
Edge Beveling
Drilling & Punching
Bending & Forming
Quality & Manufacturing Assurance
Packaging & Logistics
- Bundled with steel straps on wooden skids
- Marking: Grade, size, heat number, weight, impact grade E (-40°C)
- FOB/CIF/CFR from main Chinese ports
Frequently Asked Questions
Q550FTE vs Q550FTD?
Q550FTE: -40°C impact (34J), Q550FTD: -20°C impact (34J). Q550FTE for arctic conditions.
International equivalents?
EN S550 series only guarantees to -20°C. Q550FTE is a specialized extreme low-temperature steel.
Third-party inspection for -40°C?
Yes, SGS, BV, TÜV available including -40°C impact verification.
Request a Quotation
Interested in Q550FTE arctic-grade high-strength steel for extreme cold wind power projects? Please fill out the form below.