SS675

SS675 is a high-strength, low-alloy structural steel commonly used in construction and engineering applications. It is part of the British Standards (BS) series, specifically defined under BS EN 10025-2, which outlines the specifications for hot-rolled structural steel products. This grade is known for its improved mechanical properties, including higher yield strength and tensile strength compared to standard carbon steels like BS4360 Grade 43A.

The chemical composition of SS675 typically includes carbon (C), manganese (Mn), silicon (Si), phosphorus (P), sulfur (S), and sometimes trace elements like copper (Cu) or nickel (Ni) to enhance its performance. The exact composition may vary slightly depending on the manufacturer but generally falls within the following ranges: carbon (0.12–0.20%), manganese (1.20–1.60%), and low levels of phosphorus and sulfur (≤0.035% each). The steel is designed to provide better weldability, toughness, and resistance to atmospheric corrosion while maintaining structural integrity.

SS675 is widely utilized in the fabrication of beams, columns, and other structural components for buildings, bridges, and industrial frameworks. Its higher strength allows for lighter and more efficient designs without compromising safety. The material is also suitable for applications requiring resistance to dynamic loads, such as in earthquake-prone regions or heavy machinery supports. However, proper welding techniques and post-weld treatments may be necessary to fully utilize its properties and prevent issues like hydrogen-induced cracking.

Like other structural steels, SS675 undergoes rigorous testing to ensure compliance with mechanical and chemical standards. This includes tensile testing, impact testing (e.g., Charpy V-notch), and chemical analysis to verify its suitability for intended applications. The steel is available in various product forms, including plates, sections, and bars, and is often specified in engineering projects where performance and durability are critical.