Tel: 860-571-3602  |
Tel: 860-571-3602  |

Stainless Steel Balls: Corrtech, AISI-440C

 CorrTech Stainless Steel Balls Specifications


Carbon Chromium Molybdenum
0.95 – 1.20% 16 – 18% 0.75% max

*other elements based on a proprietary formulation

View Sizes, Grades, and Tolerance


AISI CorrTech stainless steel balls provide maximum hardness, toughness, and dimensional stability. They are highly resistant to rolling-contact fatigue. CorrTech stainless steel balls are used in a hardened condition, perform similarly to tool steels, and are ideal for antifriction bearings (rolling bearings).

To find out more about CorrTech Steel, click here.


CorrTech stainless steel balls achieve the highest hardness following heat treatment: Rockwell C 58 to 62. Hartford CorrTech stainless steel balls are passivated to remove free iron contaminants and facilitate the spontaneous formation of a protective passive film.

Corrosion Resistance

CorrTech stainless steel balls have excellent resistance to mild acids, alkalis, foods, fresh water, and air.


Rockwell C 58-62 measured on parallel flats.


Available in sizes from 1mm to 50.8mm in grades 10 through 1000.

Hartford Technologies is a multinational supplier of CorrTech stainless steel balls for applications including actuators, pumps, and bearings. Hartford Technologies’ design engineers are among the most knowledgeable in the industry, and our ability to manufacture on both sides of the globe gives Hartford customers a substantial advantage in cost and flexibility. We produce over one billion balls annually for high-volume OEM applications and can provide fast turn-around to meet stringent delivery requirements.

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