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Loose Bearing 440C Stainless Steel Balls 1/ 4 steel ball Corrosion Resistant

Changzhou Feige Steel Ball Co.,Ltd

Loose Bearing 440C Stainless Steel Balls 1/ 4 steel ball Corrosion Resistant

Brand Name : saige

Model Number : 1/4''

Certification : ISO9001, IATF16949

Place of Origin : Jiangsu, China

MOQ : 10000pcs

Price : 0.05-0.5usd/pc

Payment Terms : L/C, T/T, D/A, D/P, Western Union, MoneyGram

Supply Ability : 20 tons per month

Delivery Time : 5-8 work days

Packaging Details : 20kg per carton

Product Name : corrosion resistant precision balls

Material : 440C stainless steel

Diameter : 1/4''

Grade : grade 10-1000

Surface : high polished

Hardness : HRC58-60

Application : Aotomotive


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100 Pieces 1/4" Bracket Bike Loose Bearing Balls Stainless steel ball 440c

Quick Details:

  • 440C stainless steel is wear resistant and can be heat treated to very high hardness ratings, surpassing the hardness of 440a and 440B stainless steel
  • Mirror-like finish provides a bright, reflective appearance
  • Grade 10
  • Precision tolerance

Detailed Description

Type 440C Stainless Steel is widely used in antifriction bearings, in valves and in many other applications where high hardness and reasonable corrosion resistance are required. This material is much more resistant to abrasion and wear than chrome steel. It is a high alloy, fine grain, through hardening, Martensitic stainless steel. Because of its high hardness and fine grain structure, it can be finished to a fine dimensional quality.


This material will harden to 58 rockwell "C" (58 HRC) minimum. The hardness is measured on parallel ground flats or the reading taken on the spherical surface is corrected for the curve. The HRC scale uses 150 kilogram load ( approximately 330 lb. ) applied to a conical diamond "brale" indenter.


of this material is .277 pounds per cubic inch ( 7.67 g/cm^3).


This material is strongly attracted by a magnetic field.


In the hardened condition, this material can be ground, honed, and lapped using conventional abrasives. It can be shaped and drilled using electric discharge machining or ultrasonic cavitation. In the annealed condition this material can be machined using normal techniques.


Because this material has 1% carbon, it is difficult to obtain a quality weld. It can be resistance welded with difficulty. It can be soft soldered with a high tin solder using an acid flux. It can be silver soldered or brazed, but the heat will cause distortion of the ball and a considerable loss of hardness. For light load applications, the ball can be attached with an adhesive such as epoxy. When adhesive bonding is used, an area on the ball should be roughed up by etching or abrasive blasting.

Chemical Composition

AISI 440 & 440C Stainless Steel
Materials StandardChemmical Composition (%)Hardness (HRC measured on parallel flats)
AISI 440≤0.9-1≤0.80≤0.80≤0.035≤0.03≤0.0617-19-HRC56-58
AISI 440C≤0.95-1.1≤0.80≤0.80≤0.035≤0.03≤0.0616-180.4-0.7HRC58-60
Size:2.381-25.4mm Precision Grade: G10-G1000


Precision bearings, anti-friction bearings, special valves, conveyor belts and rollers, ballpoint pens. They are used in foodstuff, medical instruments, quick couplings, recirculating ball bearings, knotting devices, oil refinery devices.

Corrosion Resistance

The material resists to corrosion in contact with freshwater, steam, oil, petrol, alcohol. They are subjected to pitting corrosion in sea water environments. Poor corrosion resistance in acid environments.

Company Information

Changzhou Feige Steel Ball Co.,Ltd was founded in year 1989, it’s a professional manufacturer dedicated in producing precision steel ball.

The company is ISO 9001 and IATF 16949 certified. It covers an area of 18,000 square meters including office, workshop, warehouse and laboratory. The sophisticated laboratory equipped with precised, worldwide respected machines and is managed by properly trained and qualified personnel. Feige still continues to invest in equipment to measure and insure that specifications for roundness, surface, diameter and hardness are achieved.

The factory mainly produce chrome steel ball and stainless steel ball in accordance with international standard. Besides, it’s extremely flexible and can accommodate orders for non-standard ball sizes and diverse materials such as copper and ceramic. The Monthly production capacity is around 180 tons. These balls are widely used in precision bearings, bicycle and automotive components, sliding rails, recirculating ball screws, pumps, sprayers, milling machines.

The company has a professional team dedicated to providing affordable and reliable quality products to all customers. It’s welcomed by many customers from Europe, Asia, North America because of strict quality control, fast delivery and quick response.

Product Tags:

25mm steel ball


chinese steel balls

Quality Loose Bearing 440C Stainless Steel Balls 1/ 4 steel ball Corrosion Resistant for sale

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