416 is sulfur free-machining martensitic stainless steel bright bar.

MnS inclusions act as chip breakers and solid lubricants during cutting, greatly improving high-speed machining efficiency of Swiss lathes and automatic lathes while reducing tool wear, specially developed for mass small precision CNC parts. It retains core martensitic characteristic: hardenable via quenching & tempering, hardness reaches 32~48HRC after heat treatment with excellent wear resistance and tensile strength.

Soft annealed condition has moderate plasticity only for simple turning; severe cracking occurs during deep drawing, cold heading and bending, not suitable for forming processes. Two standard heat treatment routes: Full annealing at 750~850℃ for soft machinable state; oil quenching at 980~1050℃ + tempering at 200~400℃ to achieve high hardness & wear resistance.

Nickel & molybdenum free, its corrosion resistance is equivalent to 410, only resistant to dry atmosphere, fresh water and neutral weak acid, poor performance in brine, seawater and chloride media. Critical limitation: High sulfur causes porosity and hot cracking during welding; MnS inclusions degrade pitting resistance drastically, prohibited for welded structures and anti-corrosion pressure components.

Chemical element content (%)

Specification：1.00~300.00mm

Application:It is mainly used to manufacture light-load small valve spools, wear-resistant pins for fresh water equipment, precision screws for office automation, short tool shafts for chloride-free drying furnaces, small standard transmission parts for general machinery, internal bars for gas hot air circulation valves, small fasteners for drying equipment, non-anti-corrosion small instrument mandrels, mass pins & shafts processed by Swiss lathes, wear-resistant hardware for indoor dry environments, etc.
Widely applied in general light-duty valve supporting parts, office equipment hardware, light industrial drying facilities, civil fresh water circulating equipment, general small transmission machinery, gas hot air equipment, complete indoor drying equipment and other industries.

Core Advantages Over Competitors

1. High quality stability: Full closed-loop production and online spectral inspection strictly control C, Cr, S with qualified sulfur content. Uniform controllable martensitic grains and fine dispersed MnS precipitates ensure negligible batch fluctuation of machinability, quenched hardness and mechanical properties for consistent mass production of automatic wear-resistant small components.

2. Excellent surface quality: Dedicated high-precision cold drawing & centerless grinding lines produce smooth bars free of scale, scratches and pits with flat uniform finish. Clean surface after turning in soft annealed state; secondary polishing is unnecessary for simple components.

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.