Applications

Construction: High-rise buildings, long-span bridges (e.g., Q345qD in Wuhan Yangtze River Bridge), stadium domes.

Mechanical Engineering: Crane booms (Q390), mining equipment (Q690), agricultural machinery.

Energy and Chemicals: Wind turbine towers (Q460C), pressure vessels (16MnR), oil pipelines (X60/X70).

Transportation: Railway cars (weathering steel), truck frames (Q420), ship hulls (AH32/DH36).

Special Environments: Seismic-resistant structures (LYP160), low-temperature equipment (Q345E, -40°C impact).

 

 

 

Key Mechanical Properties of Typical Grades

Standard/Grade	Yield Strength (σₛ, MPa) ≥	Tensile Strength (σᵦ, MPa)	Elongation (δ₅, %) ≥	Impact Toughness	Application Scenarios
GB/Q345	345 (≤16mm thickness)	470–630	21	27 J (room temp, Q345D)	Bridges, buildings, vehicles
ISO/S355J2	355	490–630	22	27 J (-20°C)	Industrial structures, pressure vessels
ASTM A572 Gr.50	345	450–585	21	Optional impact testing	North American bridges, buildings
EN/S460MH	460	550–680	19	27 J (room temp)	Heavy machinery, crane components
JIS/SM520	≥390	520–685	18	N/A (standard impact not specified)	Ships, pressure vessels, construction

 

 

 

 

Selection Guidelines

By Strength Requirement:

Moderate loads (buildings, simple bridges): Q345, S355, A572 Gr.50.

High loads (heavy machinery, skyscrapers): Q460, Q690, S690.

By Environmental Conditions:

Corrosive environments: Weathering steel (Q355NH, A588).

Low temperatures (≤-20°C): Grades with "D"/"E" suffixes (Q345D, S355K2).

By Processing Needs:

Welding/cold-forming: Prioritize low CE grades (Q345B, S355JR).

Wear resistance: Quenched + tempered grades (Q550, Q690).

 

 

 

 

Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our Standard Low Alloy High Strength Steel Plate, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
Our factory is committed to upholding the highest standards of safety and quality.
All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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