Q460FTD Wind Power Steel

Ultra-High-Strength Low-Temperature Grade – 460MPa Yield, Guaranteed -20°C Impact Toughness (47J) for Cold Climate Mega Wind Towers

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

Product Overview

This article introduces Q460FTD 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. Q460FTD is a high-strength low-alloy steel plate offering 460 MPa minimum yield, excellent toughness at -20°C (Grade D, 47J), and complies with GB/T 28410-2012 for wind tower construction in cold environments requiring superior load capacity.

Q460FTD is an ultra-high-strength low-alloy structural steel plate specifically designed for ultra-large wind power generation equipment requiring maximum load-bearing capacity and low-temperature toughness, complying with GB/T 28410-2012.

Key Advantages

  • Ultra-High Strength + Low-Temperature Toughness: Minimum yield strength of 460MPa combined with guaranteed -20°C impact toughness (47J).
  • Optimized for Cold Climates: Designed for ultra-large wind towers operating in winter-cold regions where low-temperature performance is critical.
  • Excellent Weldability: Optimized chemical composition with low carbon equivalent ensures reliable fabrication.
  • Cost-Effective Solution: Ultra-high strength allows for lighter tower designs, reducing material and transportation costs.

International Grade Comparison

🇨🇳 Q460FTD (GB/T 28410-2012)
C: ≤0.20%
Mn: 1.00-1.70%
P: ≤0.025%
S: ≤0.015%
Si: ≤0.60%
Als: ≥0.015%
Yield: ≥460MPa (≤16mm)
Impact: -20°C (47J)
🇪🇺 EN 10025-2 S460 Series
C: ≤0.20%
Mn: ≤1.70%
P: ≤0.035%
S: ≤0.035%
Si: ≤0.60%
N: ≤0.012%
Yield: ≥460MPa
Impact: JR=20°C / J0=0°C / J2=-20°C
Functional Equivalent: Q460FTD ≈ S460J2 (-20°C impact)
🇺🇸 ASTM A709 Gr.70 (A709Gr70)
C: ≤0.23%
Mn: 0.60-1.35%
P: ≤0.035%
S: ≤0.035%
Si: 0.15-0.40%
Cu: ≥0.20%
Yield: ≥485MPa (70ksi)
Tensile: ≥550MPa
Note: Q460FTD has specified -20°C impact (47J) for cold climate wind tower applications.
Note: Q460FTD combines ultra-high strength (460MPa) with -20°C impact toughness. EN S460J2 offers similar -20°C impact properties. ASTM A709 Gr.70 is a bridge-grade steel with comparable strength.

Domestic Grade Comparison: Q420FTD / Q460FTC / Q550FTD

Q420FTD
Impact: -20°C

Yield: ≥420MPa

Tensile: 520-680MPa

Impact: 47J

Q460FTC
Impact: 0°C

Yield: ≥460MPa

Tensile: 550-720MPa

Impact: 47J

Q460FTD ★
Impact: -20°C

Yield: ≥460MPa

Tensile: 550-720MPa

Impact: 47J

Q550FTD
Impact: -20°C

Yield: ≥550MPa

Tensile: 600-780MPa

Impact: 47J

Note: Q460FTD offers ultra-high yield strength (460MPa) with -20°C impact toughness. Q460FTC has same strength but only 0°C impact. Q550FTD provides even higher strength (550MPa) with -20°C impact for extreme applications.

Technical Specifications

Q460FTD Chemical Composition (GB/T 28410-2012, wt%)

Element Value / Range
C (max) 0.20
Mn 1.00~1.70
P (max) 0.025
S (max) 0.015
Si (max) 0.60
Nb (max) 0.070
V (max) 0.15
Ti (max) 0.050
Mo (max) 0.30
Cr (max) 0.60
Ni (max) 0.80
Cu (max) 0.55
Als (min) 0.015
N (max) 0.012
Note: Higher alloy content (Cr, Ni, Mo) for enhanced strength and low-temperature toughness.

Applications

Cold Climate Ultra-Large Wind Turbine Towers

Primary application for Q460FTD, offering ultra-high strength (460MPa yield) and -20°C impact toughness for the largest wind turbine tower structures in cold climate regions requiring maximum load-bearing capacity and low-temperature reliability.

  • Tower shell sections for ultra-large wind turbines in cold climate zones
  • Flanges, ring stiffeners, connection brackets requiring -20°C impact at 460 MPa strength
  • Transition pieces for tallest towers (120m+ hub height) in low-temperature regions
  • Offshore wind projects in cold seas demanding high strength and subzero toughness

Available Supply Range

📏 Thickness

  • Plates: 8-150mm
  • Coils: 2.0-12.0mm

📐 Width & Length

  • Width: 900-5300mm
  • Length: 6000-12000mm
Lead Time: 35-50 days for ultra-high-strength low-temperature grade

Custom Fabrication Services

Custom Cutting

Edge Beveling

Drilling & Punching

Bending & Forming

Quality & Manufacturing Assurance

ISO 9001:2015
CE Marking
SGS/BV/TÜV

Packaging & Logistics

  • Bundled with steel straps on wooden skids
  • Marking: Grade, size, heat number, weight, impact grade D (-20°C)
  • FOB/CIF/CFR from main Chinese ports

Frequently Asked Questions

Q460FTD vs Q460FTC?

Q460FTD: -20°C impact (47J), Q460FTC: 0°C impact (47J). Q460FTD for cold climates.

International equivalents?

Comparable to EN S460J2 (-20°C) and ASTM A709 Gr.70.

Third-party inspection?

Yes, SGS, BV, TÜV available including -20°C impact verification.

Request a Quotation

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