440 - Materials - Technical Information

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440 - Materials - Technical Information - Hobby and Engineering

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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H.E. Supplies (Hobby Engineering Supplies) offers thousands of products including remote controlled cars, planes, boats, and helicopters. We stock spare parts for remote controlled models. Our range includes the popular Solarbotics solar model kits and spares. We also distribute the full range of miniature engineering products from Miniature Bearings Australia. This range includes small bearings, timing pulleys, timing belts, seals, o-rings, gears and more. Also available from our store in Mansfield Queensland are a full range of lubricants, adhesives, balsa wood and plastic rod and sheet materials. See our Online Catalogue for more information. Our main business is handled from our sales counter and showroom at 186 Wecker Road Mansfield, Queensland, Australia, but we also sell by phone, fax, online and mail order. We also offer all of our hobby and engineering parts through our online store.

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 also suggest that you may want to take a look at the technical information sites - Shafting Information, Couplings Information and Gearboxes Information.

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