PRODUCTS

Product Introduction

Q345 Low-Alloy Steel Plate: A high-strength structural steel suitable for heavy-duty structures and engineering machinery.

Designed specifically for applications requiring high load-bearing capacity, such as bridge construction, high-rise buildings, and heavy equipment, it offers a higher strength-to-weight ratio than ordinary carbon steel while maintaining excellent weldability.

Q345 low-alloy steel plate achieves grain refinement and precipitation strengthening through the addition of alloying elements such as manganese and vanadium. Its yield strength is approximately 50% higher than that of Q235, while maintaining excellent impact toughness even at low temperatures. This material is widely used in heavy-duty applications, such as large engineering structures, pressure vessels, and mining machinery.

Certifications and Key Advantages

GB/T 1591 and ASTM A572 certified: Complies with EN 10025 S355 standards.

Strength Advantage: 40-50% higher load-bearing capacity than Q235.

Custom Sizes Available: Thicknesses of 6-300mm (±0.2mm), Widths of 1500-3200mm.

Minimum order quantity 5 tons: delivery in normalized, controlled rolled or TMCP state is available.

Technical SpecificationsMechanical Properties

Material Composition:

Carbon (C): ≤0.20%

Manganese (Mn): 1.00-1.60%

Silicon (Si): ≤0.55%

Phosphorus (P): ≤0.035%

Sulfur (S): ≤0.035%

Vanadium (V): ≤0.15% (optional)

Delivery Condition Options:

Hot-rolled: Optimal cost, suitable for general structures

Normalized: Uniform microstructure and stable performance

TMCP: Excellent weldability, no preheating required

Dimensional Tolerances

Applications

Bridge Engineering: Steel box girders, bridge decks, and support structures

Building Structures: Super-high-rise frames, heavy-duty factory trusses

Construction Machinery: Excavator booms, crane main beams

Pressure Vessels: Boiler shells, storage tanks, reactors

Mining Equipment: Crusher frames, conveyor structures

Processing Guidelines

Cutting: Plasma or laser cutting is recommended, preheating temperature 80-120°C

Welding: Use E5015/E5016 welding rods, preheating temperature 100-150°C

Drilling: Carbide drill bit, cutting speed 15-20 m/min

Cold Bending: Minimum bend radius = 3.0 times the material thickness (in the rolling direction)

Quality Assurance

Comprehensive Testing: Tensile, flexural, impact, and Z-axis performance tests

Non-destructive Testing: Ultrasonic testing meets GB/T 2970 Level II requirements

Heat Treatment Records: Complete heat treatment process curves archived

Certifications: ISO 9001:2015, CE-PED, ABS certified

Competitive Advantages

Lightweight: 25-30% lighter than Q235 under equivalent loads

Low-Temperature Toughness: Guaranteed impact energy at -20°C, suitable for cold regions

Advanced Process: TMCP technology reduces carbon equivalent by 0.08%

Delivery Time: 10-15 days (Minimum order quantity 1 ton)

Logistics and Compliance

Packaging: Rust-proof coating + edge protection + steel frame

Storage Requirements: Stack by category, clearly label, and avoid mixing

Special Services: Third-party notarized inspection and material certification available

Comparative Analysis

Chuang Fu Yuan Steel Co., Ltd. is a multi-ISO-certified steel manufacturer specializing in carbon, stainless, and galvanized steel. We offer competitive pricing and meet ASTM/JIS standards. Receive instant quotes for bulk orders, and we offer global shipping support.

Tel: +86 18963548770

Email: info@cfysteel.com

WhatsApp: +86 18963548770

WeChat: +86 18963548770