405 is aluminum-stabilized ferritic stainless steel bright bar.
Aluminum binds free carbon to prevent chromium carbide precipitation at 400~600℃, eliminating intergranular corrosion after welding which troubles standard 410 & 420. Nickel-free design delivers low material cost with better oxidation resistance than 410.
Balanced room-temperature mechanical properties with medium hardness, moderate plasticity for simple bending & stamping, poor cold heading performance. It cannot be quenched hard; no martensitic transformation hardening. Annealing at 780~850℃ softens material and improves toughness.
Narrow thermoplastic forming window, hot forging & rolling stable only at 750~950℃; grain coarsening occurs at over-high temperature. Prone to built-up edge during machining, harder to cut than austenitic steel.

Chemical element content (%)

Specification：1.00~300.00mm

Application:It is mainly used to manufacture boiler burner bars, low-temperature furnace support brackets, dry heat chloride-free fasteners for petrochemical refining, gas hot air pipe fittings, load-bearing shafts for high-temperature ovens, low-temperature dry flue components for waste incineration, non-chloride heating exchange parts, drying equipment valve bodies, low-cost welded standard parts, connectors for low-temperature steam drying equipment, etc.
Widely applied in industrial low-temperature heat treatment furnaces, civil boiler auxiliary parts, petrochemical dry heat units, hot air circulation drying equipment, waste incineration low-temperature dry flue pipelines, HVAC drying heat exchange systems, complete industrial drying equipment and other industries.

Core Advantages Over Competitors

1. High quality stability: Full closed-loop production & online spectral inspection strictly control C, Cr, Al with stable Al/C ratio. Uniform segregation-free full ferritic structure ensures negligible batch fluctuation of anti-sensitization and medium-temperature oxidation resistance for consistent mass production of low-cost dry-heat welded parts.

2. Excellent surface quality: Dedicated cold drawing & centerless grinding lines produce scale-free, scratch-free smooth bars. Smooth surface reduces cyclic thermal oxidation stress and extends service life of oven & burner components; secondary polishing is unnecessary for simple machining.

3. Ultra-high dimensional accuracy: Precision rolling mills & automatic online detectors narrow tolerance range with tiny single-bar deviation and uniform batch size, unifying component sizes in 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.