Car Beam Steel Billet Q345B

Car Beam Steel Billet Q345B

Manufacturer of high-quality Q345B steel billets specifically for automotive beam applications. Ideal for chassis, frames, and structural parts. Request a quote.

2010 ESTABLISHED

410 EMPLOYEE

363+CLIENTS

13000+ trade

Why Choose Baosteel®

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