400 Stainless Steel Ball Bearings

IBSCO provides two varieties of 400 stainless steel bearings that offer exceptional performance in moist, corrosive, and abrasive environments:

  • DD400™
  • AISI 440C


This 400-series martensitic stainless steel runs smoother, lasts longer and provides improved performance at low torque. Manufactured with a proprietary heat treating process, DD400™ miniature and instrument bearings equal or surpass AISI bearings in hardness and corrosion resistance while offering superior low-noise characteristics.


This hardened, martensitic stainless steel is the standard choice for a wide variety of military and commercial applications, especially those that require corrosion resistance from room temperature to mid-hot environments.


Stainless Steel Bearing Composition
DD400™ 0.7% C; 13% Cr
AISI 440C 1% C, 17% Cr, .5% Mo

IBSCO’s 400 series stainless steels are ideal for a wide variety of industries, including:

  • Aerospace
  • Military
  • Food/beverage

Applications include:

  • Vacuums
  • Tools
  • Motors
  • Fans

In addition to 400 series stainless steel, we offer bearings manufactured from all of today’s most versatile and durable materials, including:

Bearing Material Additional Info
300 Stainless Steel More Info
Chrome steel More Info
Ceramic More Info

Fast Delivery and Superior Quality

We have the extensive inventory of 400 stainless steel bearings that allows us to ship fast – often within a week. In addition, our inventory management services and JIT capabilities ensure our customers always have the 400 stainless steel bearings they need.

Additionally, our commitment to quality is unparalleled. We are ISO 9001:2008 certified, we maintain lot traceability for all 400 stainless bearings, and our quality control improvements are ongoing.

Contact us today.