Key Features

Typical Applications

Due to its superior overall performance, 440C stainless steel is widely used in high-demand industrial sectors:

• • Knives and Cookware: High-quality kitchen knives, outdoor blades, and surgical scalpels.
• • Bearings: Precision rolling element bearings and ball bearings for corrosive or humid environments.
• • Molds and Tools: Plastic molds, measuring tools, and industrial cutting tools where wear is a concern.
• • Mechanical Components: Valves, nozzles, pump parts, and other high-hardness hardware.

Frequently Asked Questions

What is the maximum hardness of 440C stainless steel?

Through proper heat treatment, including quenching and tempering, 440C stainless steel can reach a hardness of HRC 58-62, which is the highest among all stainless steel grades.

Is 440C stainless steel resistant to rust?

Yes, with a high chromium content of 16-18%, it offers good resistance to corrosion in normal atmospheric conditions, fresh water, and mild chemical environments.

What are the primary differences between 440A, 440B, and 440C?

The primary difference is the carbon content. 440C has the highest carbon content, resulting in the highest attainable hardness and wear resistance compared to 440A and 440B.

Can 440C stainless steel be welded?

Welding 440C is generally not recommended because of its high air-hardening capability. If welding is necessary, the material must be preheated and annealed after welding to prevent cracking.

Why is 440C preferred for ball bearings?

It provides an excellent combination of high hardness for load-bearing capacity and stainless properties for use in environments where standard steel bearings would corrode.

What surface finishes are available for 440C bars?

Common finishes include hot rolled pickled and polished finishes, depending on the specific application requirements.