Q420FTD Cold‑Resistant Wind Power Steel

GB/T 28410-2012 | 420MPa Yield | -20°C Impact (47J) for cold climate heavy towers

📏 Standard: GB/T 28410-2012
🏗️ Heavy‑duty wind towers in cold zones
❄️ -20°C Impact 47J (Grade D)
💪 Yield ≥420 MPa (≤16mm)

Product Overview

This article introduces Q420FTD 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. Q420FTD is a high‑strength low‑alloy steel plate offering 420 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 higher load capacity.

📊 Q420FTD Approximate Grade Lookup Table

Key Advantages

  • Higher Strength Grade: Minimum yield 420 MPa (≤16mm) for heavier loads and taller towers.
  • Guaranteed -20°C Impact Toughness: Minimum 47J at -20°C (Grade D) – reliable for cold regions.
  • Optimized Weldability: Low carbon (C≤0.20) and micro‑alloying (Nb, V, Ti) for excellent field welding.
  • Strict Quality Control: Full traceability with EN 10204 3.1/3.2 certification.
  • Versatile Availability: Plates up to 100mm thick, wider/longer dimensions on request.

Technical Specifications

Q420FTD Chemical Composition (GB/T 28410-2012, mass fraction %)

Element Q420FT D (max or range)
Grade Q420FT D
C (max) 0.20
Mn 1.00~1.70
P (max) 0.025
S (max) 0.015
Si (max) 0.50
Nb (max) 0.060
V (max) 0.15
Ti (max) 0.050
Mo (max) 0.20
Cr (max) 0.30
Ni (max) 0.50
Cu (max) 0.30
Als (min) 0.015
N (max) 0.012
Note: The lower limit of Mn content for normalized delivery shall be as specified. No lower limit required for other conditions.

Quality & Manufacturing Assurance

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Modern Production

Advanced continuous casting and controlled rolling

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In-process Inspection

Spectral analysis, UT testing

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Full Documentation

MTC EN 10204 3.1/3.2

ISO 9001:2015 CE Marking (PED) SGS Inspection Mill Certificate 3.1

Packaging & Logistics

  • Standard Packaging: Steel plates bundled with steel straps on wooden skids. Coils wrapped with waterproof paper.
  • Marking: Grade, size, heat number, weight clearly marked.
  • Logistics: FOB, CIF, CFR from main Chinese ports.
  • Lead Time: 25-35 days after order confirmation.

Request a Quotation

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Frequently Asked Questions

What is the main advantage of Q420FTD over Q420FTC?

Q420FTD guarantees impact toughness at -20°C (47J) compared to 0°C for Q420FTC, making it suitable for cold regions while maintaining the same 420 MPa yield strength.

Can Q420FTD be used for offshore wind in northern seas?

Yes, -20°C impact meets requirements for many North Sea and Baltic projects. For arctic offshore, consider Q420FTE or Q420FTF with lower temperature grades.

What is the MOQ for Q420FTD plates?

25MT for plates, 50MT for coils. Trial orders (10-15MT) may be accepted after discussion.

Third-party inspection available?

SGS, BV, TÜV inspection can be arranged at extra cost; mill certificate EN 10204 3.1 is always included.

For immediate inquiries, contact via WhatsApp. For detailed specs, visit the product page.
✅ Q420FTD (Grade D, -20°C impact, 47J) · GB/T 28410-2012 · Mill certificate included