Manufacturer of high-quality Q345B steel billets specifically for automotive beam applications. Ideal for chassis, frames, and structural parts. Request a quote.
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Product details
Our Car Beam Steel Billet is manufactured from Q345B low-alloy high-strength steel, specifically engineered for automotive structural applications. This premium billet offers an excellent combination of strength, formability, and impact resistance, making it ideal for critical safety components in vehicle manufacturing. The Q345B grade provides superior mechanical properties compared to standard carbon steels, ensuring enhanced performance and reliability in automotive chassis, frame systems, and structural beams where weight reduction and crashworthiness are essential.
| Parameter | Value | Remarks |
|---|---|---|
| Standard | GB/T 1591-2008 | Low alloy high-strength structural steel |
| Grade | Q345B | Impact tested at 20℃ |
| Chemical Composition (wt%) | ||
| – Carbon (C) | ≤0.20 | |
| – Silicon (Si) | ≤0.55 | |
| – Manganese (Mn) | ≤1.70 | |
| – Phosphorus (P) | ≤0.040 | |
| – Sulfur (S) | ≤0.040 | |
| – Niobium (Nb) | ≤0.07 | Microalloying element |
| – Vanadium (V) | ≤0.15 | |
| – Titanium (Ti) | ≤0.20 | |
| – Nitrogen (N) | ≤0.012 | |
| Mechanical Properties | ||
| – Yield Strength (ReL) | ≥345 MPa | For thickness ≤16mm; use Rp0.2 if yield not obvious |
| – Tensile Strength (Rm) | 470–630 MPa | |
| – Elongation (A) | ≥21% | |
| – Impact Energy (Akv) | ≥34 J | At 20℃, longitudinal specimen |
| – Bending Test | 180° | Bend diameter: 2a for ≤16mm; 3a for >16mm |
| Delivery Condition | Hot rolled, normalized, normalized + tempered, TMCP | As per order requirements |
| Typical Applications | Car beams, frames, bridges, construction machinery | Good weldability and formability |
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