Q355NE – Chinese Standard Low-Alloy High-Strength Structural Steel

Q355NE is a Chinese standard (GB/T 1591-2018) structural steel grade with improved impact toughness at low temperatures, suitable for welded structures in bridges, buildings, and heavy machinery.

Q355NE Steel For Wind Towers(Wind Tower Steel) is a high-strength low-alloy structural steel grade specifically designed for wind turbine tower applications. It meets stringent impact toughness requirements at low temperatures, ensuring reliability in harsh environmental conditions.

Standard:

Chinese: GB/T 1591 (High-strength low-alloy structural steels)

The "Q355NE" designation breaks down as:

Q ("Qu" in Chinese): Yield strength

355: Minimum yield strength (355 MPa)

N: Normalized rolling process

E: Special impact toughness at low temperatures

This steel is widely used in renewable energy infrastructure due to its balance of strength, weldability, and cold-weather durability.

Notes:

For thicker plates, yield strength decreases (e.g., ≥345 MPa for 16–40 mm).

Impact testing is mandatory for Q355NE (unlike Q355B, which has no low-temp requirements).

1. Wind turbine towers (onshore & offshore)

2. Other structural components requiring high strength and low-temperature toughness

Equivalent Standards:

European: EN 10025-3 S355NL

American: ASTM A572 Grade 50 (with supplemental Charpy V-notch testing)