Q235FTD Wind Power Steel

Premium Low-Temperature Wind Power Steel – Guaranteed -20°C Impact Toughness (47J)

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

Product Overview

Q235FTD is a specialized structural steel plate manufactured in accordance with GB/T 28410-2012, specifically designed for wind turbine tower construction requiring enhanced low-temperature toughness. This grade provides optimal strength, excellent weldability, and guaranteed impact properties at -20°C, making it suitable for wind power installations in cold climate regions.

Q235FTD is a high-quality structural steel plate designed for wind power generation equipment operating in low-temperature environments, complying with the Chinese standard GB/T 28410-2012 (Wind turbine tower steel plate).

Key Advantages

  • Superior Low-Temperature Toughness: Guaranteed impact toughness at -20°C (47J) – ideal for cold climate wind farms.
  • Excellent Weldability: Optimized chemical composition with low carbon equivalent ensures ease of fabrication.
  • Strict Quality Control: Complete traceability, ultrasonic testing available, and full certification.
  • Cost-Effective Solution: Reliable performance for cold regions with competitive pricing.

International Grade Comparison (EN 10025-2 S235 Series)

🇨🇳 Q235FTD (GB/T 28410-2012)
C: ≤0.18%
Mn: 0.50-1.40%
P: ≤0.030%
S: ≤0.025%
Si: ≤0.50%
Als: ≥0.015%
Yield: ≥235MPa (≤16mm)
Impact: -20°C (47J)
🇪🇺 EN 10025-2 S235 Series
C: ≤0.17% (S235JR)
Mn: ≤1.40%
P: ≤0.035%
S: ≤0.035%
Si: ≤0.40%
N: ≤0.012%
Yield: ≥235MPa
Impact: JR=20°C / J0=0°C / J2=-20°C
Functional Equivalent: Q235FTD ≈ S235J2 (both -20°C impact, Q235FTD requires higher 47J)
Note: Q235FTD is designed for cold climate wind power applications with guaranteed -20°C impact toughness (47J). S235J2 under EN 10025-2 offers -20°C impact (≥27J), while Q235FTD provides higher energy absorption for critical structures.

Domestic Grade Comparison: Q235FT Series & Q275FTD

Q235FTC
Impact: 0°C

Yield: ≥235MPa

Tensile: 360-510MPa

Impact Energy: 47J

Q235FTD ★
Impact: -20°C

Yield: ≥235MPa

Tensile: 360-510MPa

Impact Energy: 47J

Q235FTE
Impact: -40°C

Yield: ≥235MPa

Tensile: 360-510MPa

Impact Energy: 47J

Q275FTD
Impact: -20°C

Yield: ≥275MPa

Tensile: 370-520MPa

Impact Energy: 47J

Note: Different quality grades indicate impact test temperatures: Q235FTC=0°C, Q235FTD=-20°C, Q235FTE=-40°C. Q275FTD provides higher yield strength (275MPa) with -20°C impact toughness.

Technical Specifications

Q235FTD Chemical Composition (GB/T 28410-2012, wt%)

Element / Parameter Grade: Q235FT Class: D
C (max) 0.18
Mn 0.50~1.40
P (max) 0.030
S (max) 0.025
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 Wind Power Towers

Primary application for Q235FTD, offering excellent strength and -20°C impact toughness for wind turbine tower structures in cold regions. Ideal for onshore wind power generation equipment in northern climates, mountain areas, and winter-cold zones.

  • Tower cylindrical and conical sections for cold-climate installations
  • Flange rings and structural connections requiring low-temperature certification
  • Internal platform and ladder supports

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 Q235FTD and regular Q235B?

Q235FTD has guaranteed impact toughness at -20°C (47J), critical for wind turbine structures in cold climates.

What is the international equivalent of Q235FTD?

Comparable to S235J2 under EN 10025-2, with higher impact energy requirement (47J vs 27J).

Do you offer third-party inspection?

Yes, SGS, BV, TÜV available for pre-shipment inspection.

Request a Quotation

Interested in Q235FTD steel for cold climate projects? Please fill out the form below. Our sales team will contact you within 12 hours.