When you need a stainless steel grade that balances hardness, wear resistance, and corrosion protection, 440B stainless steel is an excellent choice. As a high-carbon martensitic stainless steel, it delivers higher strength and better edge retention than 440A, while being more corrosion-resistant than 440C. At Nifty Alloys, we supply premium-quality 440B stainless steel bars, sheets, plates, and custom-cut profiles to meet the demanding needs of industries worldwide. Whether you’re in cutlery manufacturing, engineering, automotive, or surgical equipment production, our 440B stainless steel is tested, certified, and ready for your critical applications.

What is 440B Stainless Steel?

440B stainless steel is a high-carbon martensitic stainless steel designed for applications demanding exceptional hardness, wear resistance, and good strength. As a key grade within the 440 stainless steel series, it offers a balanced set of properties that make it a reliable choice for manufacturing cutting tools, valve components, and bearings. We supply this material to engineers and manufacturers who require a steel that can be heat-treated to achieve significant hardness while maintaining better corrosion resistance than standard carbon steels.

The composition of AISI 440B stainless steel, with its high carbon and chromium content, allows it to achieve high strength and wear resistance after hardening. This positions it between the slightly softer 440A and the harder, more brittle 440C grade, providing a unique combination of durability and machinability in the annealed condition. When your project demands a hardened stainless steel that can withstand rigorous use, 440B presents a technically sound and commercially viable solution.