Round Billet Diameter 350mm 40Cr
Our 350mm diameter Round Billet is manufactured from premium 40Cr alloy steel
Large Square Billet 200x200mm Q345B
Large Square Billet 200x200mm Q345B
This Large Square Billet 200x200mm Q345B is designed with its specific chemical and mechanical properties to be suitable for a wide range of structural applications. The square shape and given size make it convenient for further processing into various desired components. Its balanced characteristics ensure its performance and reliability in different engineering projects.
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Product details
The Large Square Billet 200x200mm Q345B is a robust low-alloy high-strength steel product engineered to meet the demands of large-scale structural fabrication and heavy machinery manufacturing. Compliant with GB/T 1591-2008 standards, this 200x200mm square billet combines exceptional strength, formability, and weldability, making it an ideal raw material for creating durable, load-bearing components in construction, infrastructure, and industrial projects.
| Parameter | Value | Remarks |
|---|---|---|
| Standard | GB/T 1591-2008 | Low alloy high-strength structural steel standard |
| Grade | Q345B | Impact tested at 20℃ |
| Chemical Composition (wt%) | ||
| – Carbon (C) | ≤0.20 | To ensure good weldability and formability |
| – Silicon (Si) | ≤0.55 | Helps in deoxidation and influences strength and toughness |
| – Manganese (Mn) | ≤1.70 | Enhances strength and toughness of the billet |
| – Phosphorus (P) | ≤0.040 | Kept at low level to avoid embrittlement |
| – Sulfur (S) | ≤0.040 | Low content for better quality and performance |
| – Niobium (Nb) | ≤0.07 | Microalloying element for grain refinement |
| – Vanadium (V) | ≤0.15 | Improves strength and heat resistance properties |
| – Titanium (Ti) | ≤0.20 | Aids in enhancing toughness and structural stability |
| – Nitrogen (N) | ≤0.012 | Controlled to prevent nitrogen-induced embrittlement |
| Mechanical Properties | ||
| – Yield Strength (ReL) | ≥345 MPa | For sections within relevant size range including this square billet; crucial for withstanding load |
| – Tensile Strength (Rm) | 470–630 MPa | Ensures the overall structural integrity under various loading conditions |
| – Elongation (A) | ≥21% | Provides necessary ductility for possible deformation during processing or usage |
| – Impact Energy (Akv) | ≥34 J | At 20℃ (longitudinal specimen), important for resisting sudden impact and avoiding brittle fracture |
| – Bending Test | 180° | Bend diameter: 2a for ≤16mm; 3a for >16mm (where ‘a’ represents the relevant dimension like thickness or side length in appropriate cases), relevant for fabrication processes |
| Dimensions | 200 x 200 mm (square cross-section) | Standard nominal size; there may be allowable tolerance ranges in actual production |
| Length | Customizable according to specific requirements | Usually supplied in certain lengths as per customer orders |
| Surface Quality | Generally required to be free from cracks, surface defects like deep scratches, etc. | To meet the quality standards for further processing or application |
| Delivery Condition | Hot rolled, normalized, normalized + tempered, TMCP (Thermo-Mechanical Control Process) | Based on specific manufacturing and usage demands |
| Typical Applications | Structural components in construction, bridges, heavy machinery frames, and other applications where high strength and good formability are needed |
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