Minibearings 440 - Materials - Technical Information

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Minibearings 440 - Materials - Technical Information

440C Stainless Steel

Similar Grades
Euronorm No. 1.4125
Euronorm Name X102CrMo17
JIS SUS440C
AISI440C
UNS S44004

MBA Products made from this material
Balls, Bearings

AISI440C stainless steel is a commonly used martensitic bearing grade stainless steel usually heat treated to between 58-62 HRC. Operating temperature is approximately up to 170 Degrees Celcius. After heat treatment, 440C is capable of attaining the highest strength, hardness and wear resistance of all the stainless alloys. This hardness is due to the high carbon content of the steel. The high carbon content also makes this stainless steel very magnetic, and lowers the corrosion resistance.

If your application requires a harder material see SAE52100 Chrome Steel. If you require even greater corrosion resistance (at the expense of speed, load carrying and precision) see 316 Stainless Steel.

The main component of the steel is Fe (Iron) with the addition of the elements shown in the following chart

Max. % Chemical Composition
C	Si	Mn	P	S	Cr	Mo
0.95 to 1.20	1.0	1.0	0.04	0.03	16.00 to 18.00	0.75

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Tables and information on this web site should be read as a general guide only. The relevant standards should be consulted to ensure accuracy

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Miniature Bearings Australia offers over 100,000 products including small bearings, timing pulleys, timing belts, seals, o-rings, gears etc - see the full listing in the Online Catalogue. Our main business is through resellers including the online only distributor Small Parts and Bearings and the counter sales distributor H.E. Supplies (Hobby Engineering Supplies). Small Parts and Bearings online sales are located within our building in Dividend Street Mansfield. H.E. Supplies are located just around the corner at 186 Wecker Road Mansfield. There are many other distributors located throughout Australia and Worldwide so there are hundreds of places to buy our product. Using the links at the top of this page you will find extensive information including catalogues (Products and Store link), technical data, and other product specific information.

We sell our product worldwide through distributors. If you are a distributor of mechanical parts such as bearings and power transmission products, and you have an interest in becoming a distributor for Miniature Bearings Australia in your area/country please contact sales@minibearings.com.au with information about your company. Miniature Bearings Australia are a wholesale and OEM supply company only. There are some foreign language introductory pages in French, German, Italian, Chinese, Japanese, Spanish and Portuguese available on our site.

If you wish to purchase product online, the Small Parts and Bearings online store is linked directly to the Miniature Bearings Australia online catalogue, so all new MBA products are added automatically to their store. Recent additions include full ceramic bearings in Silicon Nitride and Zirconia, and ceramic hybrid bearings for pushbikes and other applications. New products are being added every week. We also suggest that you may want to take a look at the technical information sites - Shafting Information, Couplings Information, Gearboxes Information and General Engineering Parts Information.

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