S32304 is low-nickel low-molybdenum cost-effective duplex stainless steel bright bar with balanced 40~60% ferrite-austenite dual phase.
Low Mo-Ni formula cuts alloy cost significantly. Nitrogen solid-solution hardening delivers yield strength ≥400MPa, nearly double of 304/316L. It combines ferrite’s outstanding chloride SCC resistance and austenite’s low-temperature toughness, eliminating SCC cracking failure of 304/316L in warm chloride water. High chromium matrix provides better pitting & crevice corrosion resistance than 304, close to standard 316L. Ultra-low carbon prevents chromium carbide sensitization after welding, no post-weld annealing required for thin-wall parts.
Standard solution treatment: Water quench at 980~1030℃ to stabilize balanced dual-phase ratio. It cannot be hardened by quenching; cold working induces work hardening, while re-solution annealing restores balanced duplex microstructure and high toughness.

Chemical element content (%)

Specification：1.00~300.00mm

Application:It is mainly used to manufacture municipal wastewater heat exchanger mandrels, circulating cooling water bolts & flanges, pulp mild bleaching valve spools, building structural support parts, low-pressure fresh/seawater pipe fittings, food weak acid equipment connectors, low-temperature desulfurization fasteners for waste incineration, stressed bars for atmospheric dilute organic acid reactors, circulating water pump shafts, cost-effective pressure-bearing stainless steel standard parts, etc.

Widely applied in municipal wastewater treatment projects, anti-corrosion structural steel for bridges & buildings, paper mild bleaching lines, food ambient anti-corrosion equipment, coastal low-pressure fresh water cooling facilities, complete environmental reclaimed water reuse plants, atmospheric fine chemical weak acid production lines and civil circulating water pipe networks.

Core Advantages Over Competitors

1. High quality stability: Full closed-loop production with dual online spectral & metallographic inspection strictly controls C, Cr, Ni, Mo, N with balanced 40~60% ferrite-austenite ratio. Uniform dispersed nitrogen precipitates ensure negligible batch fluctuation of yield strength, SCC resistance and weldability for consistent mass production of low-cost municipal & paper-making anti-corrosion components.

2. Excellent surface quality: Dedicated high-precision cold drawing & centerless grinding lines produce bars free of scale, scratches and pits with smooth uniform finish. Smooth surface lowers chloride pitting initiation risk to extend fatigue life under circulating cooling water service; secondary polishing is unnecessary for most precision machining.

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

4. Rich product variety: According to market demand and customer's special requirements, customized 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.