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.

Hardness

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.

Density

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

Magnetic

This material is strongly attracted by a magnetic field.

Machinability

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.

Weldability

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

Application

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.