In addition to carbon steel ball,chrome steel ball,stainless steel
ball is always more be used for the valve body and valve ,because of its
very strong rust preventing characteristics.Stainless steel ball mainly
consists of austenite series and martensite series
| Austenite series | martensite series |
| Representative of steel | |
| 304 | 440C |
| use | |
| Generally used for valve body,stir,etc. | Ball bearing,valve etc. |
| features | |
|
Can not be hardened by heat treatment
Excellent corrosion resistance High durability of non-magnetic |
Can be hardened by heat treatment Having excellent mechanical properties |
| material | |
| 304 316 | 420 440 |
| Specifications can be processed | |
| 0.3mm～3”（76.2mm） | 0.4mm～4”（101.6mm） |
| hardness | |
| HRC25～39 | HRC58～65 |
| grade | |
| G500 | G3～G200 |
| Specific gravity | |
| 7.93 | 7.8 |
| other | |
|
No rust Antimagnetic Machinable
|
Can rust (Rust much better than carbon steel chrome steel) Not magnetically shielded Can not be processed
|
StainlessSteel
| Material | Chemical Composition(%) | ||||||||
| C | Si | Mn | P | S | Ni | Cr | Mo | Cu | |
| AISI 440C | 0.95-1.20 | 1.00max | 1.00max | 0.040max | 0.030max | 0.60max | 16.00-18.00 | 0.75max | --- |
| AISI 420C | 0.42-0.50 | 1.00max | 1.00max | 0.040max | 0.030max | 1.00max | 12.5-14.5 | --- | 0.30max |
| AISI 304 | 0.08max | 1.00max | 2.00max | 0.045max | 0.030max | 8.00-10.50 | 18.00-20.00 | --- | --- |
| AISI 316 | 0.08max | 1.00max | 2.00max | 0.045max | 0.030max | 10.00-14.00 | 16.00-18.00 | 2.00-3.00 | --- |
Stainless steel ball machining accuracy according to customer requirements.
Production specificationsΦ0.5mm ～Φ12.7mm
Also according to customer requirements other non-standard specifications Ball can be produced
Stainless steel balldiametermatchingtable
| Nominal | Diameter | Nominal | Diameter | Nominal | Diameter |
| 0.5mm | 0.5000 | 3.5mm | 3.5000 | 17/64 | 6.7469 |
| 0.6mm | 0.6000 | 9/64 | 3.5719 | 9/32 | 7.1438 |
| 0.7mm | 0.7000 | 5/32 | 3.9688 | 7.5mm | 7.5000 |
| 0.8mm | 0.8000 | 4mm | 4.0000 | 5/16 | 7.9375 |
| 1mm | 1.0000 | 4.5mm | 4.5000 | 8mm | 8.0000 |
| 1.2mm | 1.2000 | 3/16 | 4.7625 | 8.5mm | 8.5000 |
| 1.5mm | 1.5000 | 5mm | 5.0000 | 11/32 | 8.7313 |
| 1/16 | 1.5875 | 5.5mm | 5.5000 | 3/8 | 9.5250 |
| 2mm | 2.0000 | 7/32 | 5.5563 | 10mm | 10.000 |
| 3/32 | 2.3812 | 15/64 | 5.9531 | 13/32 | 10.3188 |
| 2.5mm | 2.5000 | 6mm | 6.0000 | 7/16 | 11.1125 |
| 3mm | 3.0000 | 1/4 | 6.3500 | 15/32 | 11.9063 |
| 1/8 | 3.1750 | 6.5mm | 6.5000 | 1/2 | 12.7 |