Mirror SGS AISI 304 G500 Stainless Steel Milling Steel Balls

Mirror SGS aisi 304 G500 stainless steel milling steel ballsProduct DescriptionName Mirror SGS aisi 304 G500 stainless steel milling steel ballsMaterial ss201/302/304/316/316L/420/440/440CSize0.5-25.4mmGrade G3;G10,G25,G40,G100,G200,G500,G1000Hardness HRC58-62Standard&

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Mirror SGS aisi 304 G500 stainless steel milling steel balls

Product Description


Mirror SGS aisi 304 G500 stainless steel milling steel balls












Widely used in high speed low-noise bearings, motorcycle, automobile parts, slide rail, caster wheel, cars etc


for the standard size, always enough stock


Good wear property, Excellent surface quality and high hardness


A. Steel drum packing
1) 250kg per steel drum
2) 4 steel drums in one pallet
3) Drum with pallet size: 75CM*75CM*65CM
B. Plywood Box packing
1) 40 cartons/woven bag in one plywood box;
2) plywood box size:80CM*65CM*80CM
C. Recommended to use 20"FT container, Maximum loading capaclity of 24 tons.
D. 20" FT container loading of 24 tons, total: 24 plywood box or Drum
E. Design according customer requirements are available.

Stainless Steel Balls Applications:

201:Special bearings, automotive components, switches, die casting devices. They are widely used in the electronic industry.

304:Special bearings and pumps, aerosol pumps, gardening and household sprayers, perfume miniature pumps, seams, medical application valves, agricultural backpack sprayers. They are used in foodstuff, aerospace and military industry.

316:Special bearings, pumps and valves, aerosol and dispenser sprayers. Utilised in the foodstuff, paper, chemical, rubber, military, textile industry. Applications in photografic devices, medical instruments, quick couplings, recirculating balls, ink cartridges, jewels.

420:Special bearings, antifriction bearings, special pumps, recirculating balls, lighters, pens, automotive seatbelts & components.

430:Special bearings and valves, cosmetic nail polish, sprayers, heat exchangers, measurement instruments.

440: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.

Stainless Steel Balls Corrosion Resistance:

AISI 201/ 304 material:Very good corrosion resistance with respect to organic substances, oxidating solutions, foodstuff, sterilizing solutions. Good resistance with respect to atmospheric corrosion and dyes. They are subjected to pitting and crevice corrosion in presence of hot chloride solutions and to stress corrosion when temperature exceeds 60°C. They do not resist to sulfuric acid solutions.

AISI 316 material:The corrosion resistance is lower than AISI 302/304 steels, causing to the high S content that favour pitting corrosion. Steel not recommended for sea water applications.

AISI 420 material:Balls of these materials resist in contact with water, steam, oil and petrol.Good corrosion resistance in industrial atmosphere, freshwater, steam, alcool, ammonium, several oilfield products and organic compounds, dairy products, mild acid environments. Fairish in foodstuff and alkaline solutions. Fair in salt atmosphere. It does not resist in contact with sea water and strong acids (even if diluted).

AISI 430 material:430 balls resist in freshwater, steam, air, detergents, soaps, organic and oxidating acids, alkaline solutions.They do not resist to chloride, fluoride, bromide, iodide solutions. The corrosion resistance is lower than AISI 302/304 steels.

AISI 440 material:The material resists to corrosion in contact with freshwater, steam, oil, petrol, alcool. They are subjected to pitting corrosion in sea water environments. Poor corrosion resistance in acid environments.

Chemical Composion



. 08% MAX.
2% MAX.
1% MAX.
. 045 % MAX.
. 03% MAX.

Variation of Ball Diameter VDws

Variation of Ball Diameter
Deviation from Spherical Form
Variation of Ball Lot Diameter
Surface roughness


1.588mm 1/16''600,000pcs
3.175mm 1/8''75,000pcs
3.969mm 5/32''39,000pcs
4.763mm 3/16''22,000pcs
5.953mm 15/64''11,000pcs
6.35mm 1/4''10,000pcs
7.938mm 5/16''5,000pcs
9.525mm 3/8''2,800pcs
12.7mm 1/2''1,200pcs

Product Overviews
Mirror SGS aisi 304 G500 stainless steel milling steel balls

<img src="http://g01.s.alicdn.com/kf/HTB1pOnCHXXXXXcaXpXXq6xXFXXXE/200498866/HTB1pOnCHXXXXXcaXpXXq6xXFXXXE.jpg" alt="Mirror SGS aisi 304 G500 stainless steel milling steel balls" ori-width="726" ori-height="485">

<img src="http://g02.s.alicdn.com/kf/HTB15tPXHXXXXXXhXpXXq6xXFXXXX/200498866/HTB15tPXHXXXXXXhXpXXq6xXFXXXX.jpg" alt="Mirror SGS aisi 304 G500 stainless steel milling steel balls" ori-width="726" ori-height="485">

<img src="http://g02.s.alicdn.com/kf/HTB1Z0uRHXXXXXbiXVXXq6xXFXXXJ/200498866/HTB1Z0uRHXXXXXbiXVXXq6xXFXXXJ.jpg" alt="Mirror SGS aisi 304 G500 stainless steel milling steel balls" ori-width="726" ori-height="485">

<img src="http://g02.s.alicdn.com/kf/HTB1C9vrHXXXXXcfXFXXq6xXFXXXb/200498866/HTB1C9vrHXXXXXcfXFXXq6xXFXXXb.jpg" alt="Mirror SGS aisi 304 G500 stainless steel milling steel balls" ori-width="726" ori-height="485">
Mirror SGS aisi 304 G500 stainless steel milling steel balls

<img src="http://g04.s.alicdn.com/kf/HTB1b79MHXXXXXceXVXXq6xXFXXXv/200498866/HTB1b79MHXXXXXceXVXXq6xXFXXXv.jpg" ori-width="652" ori-height="556">

Process Flow
Mirror SGS aisi 304 G500 stainless steel milling steel balls

<img src="http://g03.s.alicdn.com/kf/HTB1UovAGpXXXXaeXXXXq6xXFXXXJ/200498866/HTB1UovAGpXXXXaeXXXXq6xXFXXXJ.jpg" alt="Mirror SGS aisi 304 G500 stainless steel milling steel balls" ori-width="397" ori-height="632">
How a Ball is Made

Heading: In the first step, heading machines cut wire into short lengths and form it into spherical shapes between dies.

Deflashing: The flash line, a ridge left by the forming dies, is removed as balls roll between heavy, cast iron plates.

Soft Grinding: Similar to deflashing, except that a grinding stone is used to improve precision.

Heat-treating: Carbon steel balls are next carburized and hardened. Heat treatment imparts the desired hardness and case depth.

Descaling: This step removes the residues and by-products from the heat-treating process.

Hard Grinding: Slow, meticulous grinding assures proper sizing and sphericity, with tolerances as close as ±.0001".

Lapping: Several proprietary lapping processes can bring balls to the requirements of ISO 3290 Grade 10 - 48.

Finishing: Proprietary chemical and mechanical processes give the balls their final micro-smoothed finish, for increased wear resistance and product longevity.
Packaging & Shipping
Mirror SGS aisi 304 G500 stainless steel milling steel balls

1)Our Good Package

1. Weight steel balls
2. Put antirust paper in each plastic bags
3. Seal each plastic bags
4. Put plastic bags into box
5.Each box has the label,including the product name, size, quantity.Grade and lot number

<img src="http://g02.s.alicdn.com/kf/HTB1s.e0HXXXXXbAaXXXq6xXFXXX9/200498866/HTB1s.e0HXXXXXbAaXXXq6xXFXXX9.jpg" alt="Mirror SGS aisi 304 G500 stainless steel milling steel balls" ori-width="625" ori-height="412">

<img src="http://g03.s.alicdn.com/kf/HTB1.WaQHXXXXXbLXFXXq6xXFXXXe/200498866/HTB1.WaQHXXXXXbLXFXXq6xXFXXXe.jpg" alt="Mirror SGS aisi 304 G500 stainless steel milling steel balls" ori-width="742" ori-height="301">

Company Information
Mirror SGS aisi 304 G500 stainless steel milling steel balls

<img src="http://g03.s.alicdn.com/kf/HTB1VDW8HXXXXXcYXpXXq6xXFXXX7/200498866/HTB1VDW8HXXXXXcYXpXXq6xXFXXX7.jpg" alt="Mirror SGS aisi 304 G500 stainless steel milling steel balls" ori-width="711" ori-height="506">
About Us
Liangshan Pengcheng Steel Ball Manufacture Co., Ltd. is a professional large-scale manufacturer of all types of steel ball, integrating development and production together. Our company is formerly named Venus Steel Ball Company, founded in 1980. We have more than 30 years of history in the steel ball industry. Our main products include carbon steel ball, stainless steel ball, chrome steel ball, brass ball, mining ball, grinding ball, rod and saucer and related products. Located in Jining, Shandong, near Qufu and Yanzhou city, we enjoy convenient water, land and air transportation.
Currently, Pengcheng Steel ball is already exported to America, Korea, Australia, Russia, Italy and 20 other countries and regions. Our company has always focused on research, development and innovation, and has recently developed new ultra wear-resistant bearing steel ball. We have attained ISO9001 environmentally management certification, and been certified by RoHS in 2013.
Pengcheng Steel ball will initiate the second phase of our development strategy. Our company regards "reasonable prices, efficient production time and good after-sales service" as our tenet. We hope to cooperate with more customers for mutual development and benefits. We welcome potential buyers to

Basic Information

Product/Service (We Sell):Steel Ball,Chrome Steel BAll,Carbon Steel Ball,Stainless Steel Ball,Grinding steel Ball


Number of Employees:51 - 100 People

Trade & Market

Main Markets:Western Europe
Eastern Asia
Mid East
Southeast Asia
Eastern Europe
South America
North America

Total Annual Sales Volume:US$1 Million - US$2.5 Million

Export Percentage:11% - 20%

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