Q460FTF Wind Power Steel

Ultimate Polar Grade – 460MPa Yield, Guaranteed -50°C Impact Toughness (34J) for Arctic & Antarctic Mega Wind Towers

📏 Standard: GB/T 28410-2012
🏗️ Polar / Antarctic Mega Wind Towers
❄️ Impact -50°C / 34J

Product Overview

This article introduces Q460FTF 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. Q460FTF is a high-strength low-alloy steel plate offering 460 MPa minimum yield, the highest low-temperature toughness at -50°C (Grade F, 34J), and complies with GB/T 28410-2012 for wind tower construction in extreme arctic environments requiring maximum cold resistance.

Q460FTF (Grade F) represents the highest low-temperature toughness grade in the GB/T 28410-2012 standard, designed for polar and extreme cold climate wind power applications where temperatures can drop below -50°C.

Key Advantages

  • Ultimate Low-Temperature Toughness: Guaranteed impact toughness at -50°C (34J) – the highest cold-resistance grade available for wind tower steel.
  • High Strength + Polar Durability: 460MPa minimum yield combined with exceptional performance in polar environments.
  • Excellent Weldability: Optimized chemical composition with low carbon equivalent and tighter P/S control ensures reliable fabrication.
  • Cost-Effective Polar Solution: Higher strength allows for optimized tower designs in extreme environments, reducing overall project costs.

International Grade Comparison

🇨🇳 Q460FTF (GB/T 28410-2012)
C: ≤0.20%
Mn: 1.00-1.70%
P: ≤0.020%
S: ≤0.010%
Si: ≤0.60%
Als: ≥0.015%
Yield: ≥460MPa (≤16mm)
Impact: -50°C (34J)
🇪🇺 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
Note: EN S460 series only guarantees to -20°C. Q460FTF's -50°C far exceeds standard specs.
🇺🇸 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: A709 Gr.70 not rated for -50°C. Q460FTF is specialized ultimate low-temp steel.
Note: Q460FTF is a specialized ultimate low-temperature steel. Standard EN 10025-2 S460 and ASTM A709 do not certify impact at -50°C. Q460FTF is designed specifically for polar wind power applications.

Domestic Grade Comparison: Q420FTF / Q460FTE

Q420FTF
Impact: -50°C

Yield: ≥420MPa

Tensile: 520-680MPa

Impact: 34J

Q460FTE
Impact: -40°C

Yield: ≥460MPa

Tensile: 550-720MPa

Impact: 47J

Q460FTF ★
Impact: -50°C

Yield: ≥460MPa

Tensile: 550-720MPa

Impact: 34J

Note: Q460FTF is the ultimate polar grade (F = -50°C impact). Q420FTF provides lower strength (420MPa) with -50°C impact. Q460FTE offers -40°C with higher impact energy (47J) but same strength.

Technical Specifications

Q460FTF Chemical Composition (GB/T 28410-2012, wt%)

Element Value / Range
C (max) 0.20
Mn 1.00~1.70
P (max) 0.020
S (max) 0.010
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) 0.010
Note: Tighter P/S control (P≤0.020%, S≤0.010%) and lower N content for enhanced low-temperature toughness at -50°C. Higher alloy content for ultra-high strength.

Applications

Polar & Antarctic Mega Wind Turbine Towers

Primary application for Q460FTF, offering high strength (460MPa yield) and ultimate -50°C impact toughness for large wind turbine tower structures in arctic, Antarctic, Siberian, and other polar regions requiring ultimate cold resistance.

  • Tower shell sections for arctic, Antarctic, and Siberian mega wind farms
  • Flanges, ring stiffeners requiring -50°C impact certification at 460 MPa
  • Offshore wind towers in polar environments and ice-resistant structures
  • Critical load-bearing components for extremely low-temperature service below -40°C

Available Supply Range

📏 Thickness

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

📐 Width & Length

  • Width: 900-5300mm
  • Length: 6000-12000mm
Lead Time: 40-60 days for ultimate polar-grade steel

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 F (-50°C)
  • FOB/CIF/CFR from main Chinese ports

Frequently Asked Questions

Q460FTF vs Q460FTE?

Q460FTF: -50°C impact (34J), Q460FTE: -40°C impact (47J). Q460FTF is the ultimate polar grade for arctic/Antarctic conditions.

International equivalents?

EN S460 series only guarantees to -20°C. ASTM A709 Gr.70 not rated for -50°C. Q460FTF has no direct equivalent.

Third-party inspection for -50°C?

Yes, SGS, BV, TÜV available including -50°C impact verification.

Request a Quotation

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