Q275FTE Wind Power Steel

High-Strength Arctic Grade – 275MPa Yield, Guaranteed -40°C Impact Toughness (34J) for Extreme Cold Wind Farms

📏 Standard: GB/T 28410-2012
🏗️ Arctic / Subarctic Wind Towers
❄️ Impact -40°C / 34J

Product Overview

Q275FTE is a high-strength structural steel plate manufactured in accordance with GB/T 28410-2012, specifically designed for wind turbine tower construction requiring superior load-bearing capacity and extreme low-temperature toughness. This grade provides higher yield strength (275 MPa) compared to Q235 series, excellent weldability, and guaranteed impact properties at -40°C, making it ideal for wind power installations in arctic, subarctic, and high-altitude regions requiring exceptional strength-to-weight ratio and cold resistance.

Q275FTE (Grade E) represents a high low-temperature toughness grade in the GB/T 28410-2012 standard, designed for arctic and extreme cold climate wind power applications where temperatures can drop below -40°C.

Key Advantages

  • Extreme Low-Temperature Toughness: Guaranteed impact toughness at -40°C (34J) – ideal for arctic and subarctic wind farms.
  • High Strength + Cold Durability: 275MPa minimum yield strength combined with exceptional performance in extreme cold environments.
  • Excellent Weldability: Optimized chemical composition with low carbon equivalent and tighter P/S control ensures reliable fabrication.
  • Cost-Effective Arctic Solution: Higher strength allows for optimized tower designs in extreme environments, reducing overall project costs.

International Grade Comparison

🇨🇳 Q275FTE (GB/T 28410-2012)
C: ≤0.18%
Mn: 0.50-1.50%
P: ≤0.025%
S: ≤0.015%
Si: ≤0.50%
Als: ≥0.015%
Yield: ≥275MPa (≤16mm)
Impact: -40°C (34J)
🇪🇺 EN 10025-2 S275 Series
C: ≤0.21%
Mn: ≤1.50%
P: ≤0.035%
S: ≤0.035%
Si: ≤0.40%
N: ≤0.012%
Yield: ≥275MPa
Impact: JR=20°C / J0=0°C / J2=-20°C
Comparison Note: EN S275 series typically only guarantees to -20°C. Q275FTE's -40°C requirement exceeds standard specifications.
🇺🇸 ASTM A709 Gr.36 (A709Gr36)
C: ≤0.26%
Mn: 0.60-0.90%
P: ≤0.035%
S: ≤0.035%
Si: 0.15-0.40%
Cu: ≥0.20%
Yield: ≥250MPa (36ksi)
Tensile: 400-550MPa
Note: A709 Gr.36 is not rated for -40°C. Q275FTE is a specialized extreme low-temperature steel.
Note: Q275FTE is a specialized extreme low-temperature steel. Standard international specifications like EN 10025-2 S275 and ASTM A709 do not typically certify impact properties at -40°C. Q275FTE is designed specifically for arctic wind power applications.

Domestic Grade Comparison: Q235FTE / Q275FTD / Q345FTE

Q235FTE
Impact: -40°C

Yield: ≥235MPa

Tensile: 360-510MPa

Impact Energy: 34J

Q275FTD
Impact: -20°C

Yield: ≥275MPa

Tensile: 410-560MPa

Impact Energy: 47J

Q275FTE ★
Impact: -40°C

Yield: ≥275MPa

Tensile: 410-560MPa

Impact Energy: 34J

Q345FTE
Impact: -40°C

Yield: ≥345MPa

Tensile: 470-630MPa

Impact Energy: 34J

Note: Q275FTE offers high strength (275MPa) with -40°C impact toughness. Q235FTE provides -40°C with lower strength. Q275FTD gives -20°C with higher impact energy (47J). Q345FTE gives even higher strength (345MPa) with -40°C impact for the most demanding arctic applications.

Technical Specifications

Q275FTE Chemical Composition (GB/T 28410-2012, wt%)

Element / Parameter Grade: Q275FT Class: E
C (max) 0.18
Mn 0.50~1.50
P (max) 0.025
S (max) 0.015
Si (max) 0.50
Nb (max) 0.050
V (max) 0.060
Ti (max) 0.050
Mo (max) 0.10
Cr (max) 0.30
Ni (max) 0.30
Cu (max) 0.30
Als (min) 0.015
N (max) 0.010
Note: The lower limit of Mn content for steel plates delivered in normalized condition shall be as specified in the table. Tighter P/S control for enhanced low-temperature toughness.

Applications

Arctic & Subarctic Wind Turbine Towers

Primary application for Q275FTE, offering high strength (275MPa yield) and extreme -40°C impact toughness for wind turbine tower structures in arctic, subarctic, high-altitude, and other extreme cold regions requiring superior load-bearing capacity and cold resistance.

  • Tower sections for arctic, subarctic, and high-altitude wind farms
  • Flange rings requiring 275 MPa yield strength with -40°C impact certification
  • Structural components for year-round operation in extreme cold environments
  • Offshore wind power projects in cold climate zones
  • High-altitude plateau wind power installations

Available Supply Range

📏 Thickness Range

  • Plates: 6mm - 120mm
  • Coils: 2.0mm - 12.0mm
  • Custom thickness available

📐 Width & Length

  • Width: 900mm - 5300mm
  • Length: 6000mm - 12000mm
  • Cut-to-length service
Stock availability: Made-to-order for extreme cold grades | Mill order: Custom sizes available with 35-50 days lead time

Custom Fabrication Services

Custom Cutting

Laser/Plasma cutting

Edge Beveling

Single/double bevel

Quality & Manufacturing Assurance

ISO 9001:2015
CE Marking
SGS/BV/TÜV

Packaging & Logistics

  • Standard Packaging: Steel plates bundled with steel straps on wooden skids.
  • Marking: Grade, size, heat number, weight, impact grade E (-40°C).
  • Lead Time: Typically 35-50 days after order confirmation for extreme cold-grade steel.

Frequently Asked Questions

What is the difference between Q275FTE and Q275FTD?

Q275FTE has guaranteed impact toughness at -40°C (34J), while Q275FTD is tested at -20°C (47J). Q275FTE is designed for arctic, subarctic, and extreme cold climate wind power applications.

What are the international equivalents of Q275FTE?

Q275FTE is comparable to EN 10025-2 S275J2 for -20°C, but for -40°C impact, it exceeds standard S275 requirements. ASTM A709 Gr.36 is not rated for -40°C. Q275FTE is a specialized extreme low-temperature steel.

Do you offer third-party inspection for -40°C impact testing?

Yes, SGS, BV, TÜV available for pre-shipment inspection including low-temperature impact verification at -40°C.

Request a Quotation

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