Q275FTC Wind Power Steel

High-Strength Wind Power Steel – 275MPa Yield Strength, Guaranteed 0°C Impact Toughness (47J)

📏 Standard: GB/T 28410-2012
🏗️ Large Wind Turbine Towers
💪 Yield ≥275MPa

Product Overview

Q275FTC is a high-strength structural steel plate manufactured in accordance with GB/T 28410-2012, specifically designed for wind turbine tower construction requiring enhanced load-bearing capacity and reliable toughness. This grade provides higher yield strength (275 MPa) compared to Q235 series, excellent weldability, and guaranteed impact properties at 0°C, making it suitable for wind power installations requiring superior strength-to-weight ratio.

Q275FTC is a high-quality structural steel plate designed for wind power generation equipment requiring higher strength, complying with the Chinese standard GB/T 28410-2012 (Wind turbine tower steel plate).

Key Advantages

  • Higher Strength: Minimum yield strength of 275MPa enables lighter tower designs and reduced material consumption.
  • Guaranteed Toughness: Impact toughness guaranteed at 0°C (47J) for reliable performance in temperate climates.
  • Excellent Weldability: Optimized chemical composition with low carbon equivalent ensures ease of fabrication.
  • Cost-Effective Solution: Higher strength allows for thinner sections, reducing overall tower weight and cost.

International Grade Comparison

🇨🇳 Q275FTC (GB/T 28410-2012)
C: ≤0.18%
Mn: 0.50-1.50%
P: ≤0.025%
S: ≤0.020%
Si: ≤0.50%
Als: ≥0.015%
Yield: ≥275MPa (≤16mm)
Impact: 0°C (47J)
🇪🇺 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
Functional Equivalent: Q275FTC ≈ S275J0 (0°C impact)
🇺🇸 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: Q275FTC has higher yield (275MPa vs 250MPa) and specified 0°C impact.
Note: Q275FTC is designed for higher-strength wind power applications. EN S275J0 offers similar 0°C impact properties. ASTM A709 Gr.36 is a bridge-grade steel with comparable strength but lower guaranteed impact values.

Domestic Grade Comparison: Q235FTC / Q275FTD / Q345FTC

Q235FTC
Impact: 0°C

Yield: ≥235MPa

Tensile: 360-510MPa

Impact Energy: 47J

Q275FTC ★
Impact: 0°C

Yield: ≥275MPa

Tensile: 410-560MPa

Impact Energy: 47J

Q275FTD
Impact: -20°C

Yield: ≥275MPa

Tensile: 410-560MPa

Impact Energy: 47J

Q345FTC
Impact: 0°C

Yield: ≥345MPa

Tensile: 470-630MPa

Impact Energy: 47J

Note: Q275FTC offers higher yield strength (275MPa) than Q235FTC while maintaining 0°C impact toughness. Q275FTD provides the same strength with -20°C impact for colder regions. Q345FTC is a higher-strength option for very large turbines.

Technical Specifications

Q275FTC Chemical Composition (GB/T 28410-2012, wt%)

Element / Parameter Grade: Q275FT Class: C
C (max) 0.18
Mn 0.50~1.50
P (max) 0.025
S (max) 0.020
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) 0.012
Note: The lower limit of Mn content for steel plates delivered in normalized condition shall be as specified in the table.

Applications

Medium-to-Large Wind Turbine Towers

Primary application for Q275FTC, offering higher strength (275MPa yield) and 0°C impact toughness for wind turbine tower structures requiring superior load-bearing capacity. Ideal for onshore wind power projects with standard temperature conditions.

  • Tower cylindrical and conical sections for medium-to-large wind turbines
  • Flange rings and structural connections requiring 275 MPa yield strength
  • Load-bearing internal platforms and ladder supports
  • Transition sections and door frame reinforcements

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: Regular sizes in stock for quick delivery | Mill order: Custom sizes available with 30-45 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 Inspection

Packaging & Logistics

  • Standard Packaging: Steel plates bundled with steel straps on wooden skids.
  • Marking: Grade, size, heat number, weight.
  • Lead Time: Typically 30-45 days after order confirmation.

Frequently Asked Questions

What is the difference between Q275FTC and Q235FTC?

Q275FTC has higher yield strength (275MPa vs 235MPa) and higher tensile strength (410-560MPa vs 360-510MPa), making it suitable for larger wind turbines requiring greater load-bearing capacity.

What are the international equivalents of Q275FTC?

Q275FTC is comparable to ASTM A709 Gr.36 (A709Gr36) and EN 10025-2 S275J0, depending on impact temperature requirements.

Do you offer third-party inspection?

Yes, SGS, BV, TÜV available for pre-shipment inspection and mechanical testing verification.

Request a Quotation

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