Q275FTD Wind Power Steel

High-Strength Low-Temperature Wind Power Steel – 275MPa Yield, Guaranteed -20°C Impact Toughness (47J)

📏 Standard: GB/T 28410-2012
🏗️ Cold Climate Large Wind Towers
❄️ Impact -20°C / 47J

Product Overview

Q275FTD 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 low-temperature toughness. This grade provides higher yield strength (275 MPa) compared to Q235 series, excellent weldability, and guaranteed impact properties at -20°C, making it ideal for wind power installations in cold climate regions requiring superior strength-to-weight ratio.

Q275FTD is a high-quality structural steel plate designed for wind power generation equipment requiring both higher strength and low-temperature toughness, complying with the Chinese standard GB/T 28410-2012 (Wind turbine tower steel plate).

Key Advantages

  • Higher Strength + Low-Temperature Toughness: Minimum yield strength of 275MPa combined with guaranteed -20°C impact toughness (47J).
  • Optimized for Cold Climates: Designed for wind towers operating in winter-cold regions where low-temperature performance is critical.
  • Excellent Weldability: Optimized chemical composition with low carbon equivalent ensures ease of fabrication even in cold environments.
  • Cost-Effective Solution: Higher strength allows for lighter tower designs, reducing material and transportation costs.

International Grade Comparison

🇨🇳 Q275FTD (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: -20°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: Q275FTD ≈ S275J2 (-20°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: Q275FTD has higher yield (275MPa vs 250MPa) and specified -20°C impact.
Note: Q275FTD combines higher strength with -20°C impact toughness. EN S275J2 offers similar -20°C impact properties. ASTM A709 Gr.36 is a bridge-grade steel with comparable strength but typically lower guaranteed impact values.

Domestic Grade Comparison: Q235FTD / Q275FTC / Q345FTD

Q235FTD
Impact: -20°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

Q345FTD
Impact: -20°C

Yield: ≥345MPa

Tensile: 470-630MPa

Impact Energy: 47J

Note: Q275FTD offers higher yield strength (275MPa) than Q235FTD while maintaining -20°C impact toughness. Q275FTC has the same strength but only 0°C impact. Q345FTD provides even higher strength (345MPa) with -20°C impact for very large turbines in cold regions.

Technical Specifications

Q275FTD Chemical Composition (GB/T 28410-2012, wt%)

Element / Parameter Grade: Q275FT Class: D
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) 0.012
Note: The lower limit of Mn content for steel plates delivered in normalized condition shall be as specified in the table.

Applications

Cold Climate Medium-to-Large Wind Turbine Towers

Primary application for Q275FTD, offering higher strength (275MPa yield) and -20°C impact toughness for wind turbine tower structures in cold climate regions requiring superior load-bearing capacity and low-temperature reliability.

  • Tower cylindrical and conical sections for medium-to-large wind turbines in cold regions
  • Flange rings and structural connections requiring 275 MPa yield strength with -20°C impact certification
  • Load-bearing internal platforms and ladder supports for winter service
  • Transition sections and door frame reinforcements for cold climate installations
  • Onshore wind power projects in temperate and cold climate zones

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 Q275FTD and Q275FTC?

Q275FTD has guaranteed impact toughness at -20°C (47J), while Q275FTC is tested at 0°C. Q275FTD is designed for cold climate wind power applications requiring low-temperature performance.

What are the international equivalents of Q275FTD?

Q275FTD is comparable to EN 10025-2 S275J2 (-20°C impact) and ASTM A709 Gr.36 (A709Gr36) with enhanced low-temperature requirements.

Do you offer third-party inspection?

Yes, SGS, BV, TÜV available for pre-shipment inspection and low-temperature impact testing verification.

Request a Quotation

Interested in Q275FTD high-strength low-temperature steel for cold climate wind power projects? Please fill out the form below. Our sales team will contact you within 12 hours.