303 Stainless Steel Bar (1.4305) 303 stainless steel bar (EN 1.4305 / AISI 303) is a free-machining austenitic stainless steel designed for high-speed turning and precision-machined components. 303 stainless bar is widely chosen for applications where fast, consistent machining is the priority, while still maintaining good general corrosion resistance for typical engineering environments. Overview303 stainless bar, also referred to as 1.4305 stainless bar, achieves its excellent machinability through a sulphur addition that improves chip breaking and supports higher cutting speeds. This makes it a strong option for CNC turning, drilling and milling, particularly in repeat production work where efficiency and surface finish matter. It is commonly supplied as stainless steel round bar and hex bar, depending on the part geometry and machining requirements. Key benefits Excellent machinability for CNC turning and high-volume production Good general corrosion resistance for general engineering use Non-magnetic in the annealed condition (may become slightly magnetic after cold work) Suitable for precision parts, fasteners and machined fittings LimitationsBecause of the sulphur addition, 303 is not generally recommended for welding and it has reduced formability compared to 304/304L. Sharp bending should be avoided. As an austenitic grade, it cannot be hardened by heat treatment, so it is not typically selected when higher hardness is required through heat treatment. If your application involves welding or significant forming, 304/304L is usually a more suitable alternative. Typical applications303 / 1.4305 stainless steel bar is commonly used for: Nuts, bolts and threaded components Bushings, spacers and couplings Shafts, pins and gears Switchgear and precision-machined parts Supply noteBelow is our standard range for 303 stainless bar in round and hex. As a stockist and supplier Ireland customers rely on, Impact Ireland can support standard sizes and help source non-standard sizes, quantities, or requirements. If you do not see the shape, size or grade you need, contact our team and we will help with availability, lead times and a quote.