303 is a sulfur free-machining austenitic stainless steel bright bar. Sulfur is added on the basis of 304 to optimize machinability. It is non-magnetic and retains the basic excellent corrosion resistance of austenitic stainless steel. It features balanced mechanical properties with moderate tensile and yield strength and good plasticity. Uniform plastic deformation occurs under force to avoid brittle fracture. It cannot be hardened by heat treatment; work hardening will occur during cold working, and plasticity can be restored by solution annealing. It boasts outstanding cutting performance: sulfur inclusions act as internal lubricants and improve chip breaking, greatly reducing tool wear in turning, milling, drilling and automatic lathe processing, raising machining efficiency and easily producing workpieces with ultra-smooth surface finish and precise dimensional accuracy. It has good thermoplasticity for smooth hot rolling and forging. Cold working processes including bending, cold heading and stamping are available. With strong versatility, it is the preferred stainless steel for automatic mass precision machining, widely used in manufacturing standard fasteners, valve parts and precision instrument components.

Chemical element content (%)

Specification：1.00~300.00mm

Application: It is mainly used to manufacture general shafts, stainless steel bolts & nuts, pins, valve bodies, instrument fittings, food equipment connectors, kitchen & bathroom hardware, home appliance structural parts, environmental equipment components, small pressure vessel accessories, etc. Widely applied in food processing machinery, kitchen & bathroom appliances, instruments and meters, general mechanical equipment, water treatment facilities, architectural hardware, conventional medical device accessories and other industries.

Core Advantages Over Competitors

1. High quality stability: Standardized full-process production and closed-loop quality inspection system with full control from raw material screening to finished product delivery. Precisely control chemical elements including carbon, chromium, nickel, silicon and manganese with minimal composition deviation, ensuring uniform hardness, corrosion resistance and mechanical properties of the whole batch for stable mass continuous processing.

2. Excellent surface quality: Dedicated high-precision cold drawing and centerless grinding production lines produce bars free of scratches, peeling and pits with outstanding flatness and finish. Smooth surface reduces machining friction loss and stress concentration to extend component service life, meeting direct usage requirements without secondary polishing for most customers.

3. Ultra-high dimensional accuracy: Precision rolling mills and automatic online dimensional detectors narrow tolerance range with tiny single-bar dimensional error and strong batch uniformity. Unified part specifications are realized during automatic mass production to raise yield and finished precision.

4. Rich product variety: According to market demand and customer's special requirements, customized 1045 bright bar products are provided to meet the use requirements under various complex working conditions, providing customers with more choices.

5. Perfect after-sales service: The perfect after-sales service system can respond to customer needs and feedback in a timely manner. For problems encountered by customers during use, technical support and solutions are provided to customers quickly.

We mainly engage in cold heading wire, bar, peeled bar, and profiled bar; our products cover 11 series and more than 300 grades, and we continue to develop a variety of professional steels. We can provide all-round solutions such as cold heading finishing line manufacturing and high-precision bright bar customization, and provide one-stop procurement services and package procurement solutions for global customers. The website displays some grades. If you don’t have the grade you need, please contact us by phone or email.