N04400 is single-phase solid-solution nickel-copper alloy bright bar, Cr & Mo free, Ni ≥63%, Cu 28~34%, single FCC austenite matrix with weak magnetism at room temperature. It cannot be hardened by quenching/aging, strength only improved via cold working.

Chemical element content (%)

Specification：1.00~300.00mm

Application:It is mainly used to manufacture HF reactor pins for fluorochemical plants, high-pressure seawater valve stems for deep offshore platforms, sour crude oil & gas pump shafts, fasteners for caustic soda evaporators, marine seawater circulation pipe flanges, high-pressure heat exchange mandrels for seawater desalination, HF-resistant wear bars for acid cleaning equipment, low-temperature deep-sea pressure standard parts, H₂S-resistant anti-corrosion wellhead bolts, internal core rods for fluoroplastic production anti-corrosion equipment, etc.
Widely applied in complete fluorochemical plants, deep offshore oil & gas platforms, chlor-alkali production lines, ocean-going marine seawater systems, large-scale seawater desalination projects, sour crude oil refining units, industrial hydrofluoric acid pickling lines and offshore wind power seawater cooling facilities.

Core Advantages Over Competitors

1. High quality stability: Full closed-loop production with dual online spectral & metallographic inspection strictly controls Ni/Cu/Fe ratio, uniform single-phase solid-solution matrix without intermetallic segregation. Negligible batch fluctuation of HF resistance, seawater SCC resistance and low-temperature impact toughness for consistent mass production of fluorochemical and deep-sea high-pressure components.

2. Excellent surface quality: Dedicated high-precision cold drawing & centerless grinding lines produce mirror-smooth bars free of scale, scratches and pits. Smooth surface reduces pitting initiation risk under HF & seawater cyclic service to extend fatigue life; secondary polishing unnecessary for precision turned parts.

3. Ultra-high dimensional accuracy: Precision cold rolling mills & automatic online dimension detectors narrow tolerance range with tiny single-bar deviation and strong batch uniformity, unifying component sizes during automatic mass production to raise finished yield.

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.