Designing and Manufacturing Stainless Steel Bearings
 

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Following list shows the comparison of corrosion resistance performance between AISI 440C stainless steel and AISI 52100 normal bearing steel. Please consult with us regarding any other chemicals not listed below.
 

CHEMICALS

 CONDITION TEMPERATURE MATERIALS
440C 52100
4-chloridated carbon dry/wet normal O X
Acetic acid
 
 		 O X
Acetone
 		 normal O -
Air
 		 normal O Slightly
Carbonic acid gas
 
 		 O X
Chloric gas dry normal O Slightly
Chloric gas wet 100oC X X
Hydrochloric acid 75% solution
 		 X X
Hydrogen peroxide
 
 		 O Slightly
Hydrogen sulfide gas dry
 		 O Slightly
Hydrogen sulfide gas wet
 		 O Slightly
Naphtha
 		 normal O -
Natural water
 		 normal O X
Nitric acid thick normal O X
Nitric acid thick boiling X X
Sea breeze
 		 normal O X
Seawater
 		 normal Slightly X
Seawater 50% solution normal/boiling O X
Sulfurous acid thick normal O Slightly
Sulfurous acid thick boiling X X
Sulfurous acid 50% solution normal/boiling X X
Sulfurous acid gas dry
 		 O X
Sulfurous acid gas wet
 		 O X
Water vapor
 		 100oC O X
O: Not affected; X: affected; -: No data available; Slightly: Slightly affected.

REMARKS
This comparison list is provided as general guidance for the users. The performance level of corrosion resistance varies, depending upon the conditions of each application. Therefore, we recommend that the user conduct actual testing to see how 440C stainless steel works in the user-specific applications. We are not responsible for any claims taken place in the users' applications without actual and prior testing.
 
　

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RADIAL BALL BEARINGS 316 Stainless Raceways Availability and Material Selection Availability Some bearings listed on data sheets may not be in inventory. Some may require a minimum order, and delivery could range from 6 to 8 weeks. Check with KMS for item availability and delivery. Material Selection KMS Stainless bearings are produced with a type AISI 316 grade stainless for raceways and balls. 316 Stainless has superior corrosion resistance. 316 Stainless is used extensively in food, medical and hostile chemical environments. 316 Stainless provides superior resistance when compared to conventional standard 440 Stainless. General Information A KMS 316 Stainless ball bearing should only be used when a conventional 440 Stainless or a KMS Plastic ball bearing are unsuitable. Reasons for use are: Environment corrodes 440 SS. Needs to be non-magnetic. Can run without lube (slow speeds). Hygienic Excessive load for Plastic ball bearing. Can run in liquids. FDA & NSF approved materials. Can run in high temperature (without cage or with high temperature polymer cage.) Value Engineering = Less Cost Only a KMS 316 Stainless ball bearing can offer you value that far exceeds its steel or 440 SS counterpart. True value is achieved by extending bearing life and offering qualities of being non-magnetic and non-contaminating in food, medical and photo environment. Evolve from your standard steel bearing to a KMS Plastic or 316 Stainless Bearing by giving us a call. We will analyze your application and find your true value solution. Special Bearings & Sizes - Variations - Engineering & Prototyping Plastic Ball Bearings "Ten Good Reasons To Use," ETC... Information presented is believed to be accurate at the time of publication but is subject to change without notice.