Q460 carbon steel coils are defined within the Chinese National Standard (GB/T 1591-2018 “Low-Alloy High-Strength Structural Steel”) as high-strength low-alloy carbon steel coils. Their core characteristics are ‘high strength and favourable comprehensive mechanical properties’. They are extensively utilised in industrial applications demanding high load-bearing capacity and weight reduction, serving as a key material for structural lightweighting to replace traditional medium- and low-strength steels (such as Q235 and Q355). and achieving structural lightweighting.