Shandong JinNai International Trade Co., Ltd.
Shandong JinNai International Trade Co., Ltd.
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Solid SUS304 SS316 AISI420 AISI440C Stainless Steel Ball For Grinding Polishing
We are a professional stainless steel ball manufacture with15 years until now.
we are specialized to produce stainless steel ball as below.
AISI304 316 302 0.4mm-50.8mm G100-G1000
AISI420 420C 440C 0.4mm-50.8mm G10-G1000
Stainless Steel Ball Description
304 Stainless steel ball
AISI 304 steel balls have no good hardness but offer good corrosion resistance,
they offer good resistance to atomospheric corrosion, dyes, food processing, valves, sex products and so on.
Hardness :HRC25-39
316 Stainless steel ball
AISI 316 steel balls have no good hardness, but have better corrosion resistance than
AISI 304, AISI 316 stainless steel balls offer good corrosion resistance to sulphuric acid compounds.
They are used in nail polish, trigger sprayers, dispenser valves, body jewelry and so on.
Hardness :HRC25-39
420 Stainless steel ball
AISI 420 have good hardness and fair-to-good corrosion resistance and strength,
it is generally used for all applications requiring resistance to corrosion such as bearings, valves,
writting instruments, food environment, fresh water, many petroleum products and mild acid environments.
AISI 420 is also magnetic.
Hardness :HRC52-65
440 Stainless Steel Ball
Chemical Composition
| Material | C | Si | Mn | Ni | P | Mo | Cr | S |
| AISI304 | 0.07 max | 1.0 max | 2.0 max | 8.0-10.5 | 0.045 max | | 17.0-19.0 | 0.03 max |
| AISI316 | 0.07 max | 1.0 max | 2.0 max | 10.0-14.0 | 0.045 max | 2.00-2.50 | 16.5-18.5 | 0.03 max |
| AISI420 | 0.40-0.50 | 1.0 max | 1.0 max | 1.0 max | 0.04 max | | 12.0-14.0 | 0.03 max |
| AISI440c | 0.95-1.20 | 1.0 max | 1.0 max | 0.60max | 0.04 max | 0.40-0.80 | 16.0-18.0 | 0.03 max |
Quality Testing
1. Ball chose by people
2. Ball select by machine
3. Ball test by Vernier calipe
4. check ball surface by magnifying glass
5. Ball test by three needle gauge
6. Ball test hardness by hardness tester
How to Inquire
When ordering balls, please specify the following
1. Steel ball diameter.
2. Type of steel ball material.
3. Precision grade and quantity.
All standard balls are always in stock and ready for immediate delivery.
If your requirement is custom made steel balls, please send us your specifications and
we could according to your requirement to custom produce.