| Item | AISI 316 | AISI 316L |
|---|---|---|
| UNS | S31600 | S31603 |
| EN | 1.4401 | 1.4404 |
| JIS | SUS316 | SUS316L |
| Main Difference | Standard carbon level | Lower carbon content |
| Molybdenum | Typically 2–3% | Typically 2–3% |
| Recommended Selection | General corrosive applications | Drawings or welded assemblies requiring low carbon |
| Material | GB/T | ASTM | EN | JIS | GOST |
|---|---|---|---|---|---|
| 316 | 316 | AISI316 | 1.4401 | SUS316 | 08KH17H13M2T |
| 316L | 1.4404 |
| C | Si | Mn | P | S | N | Cr | Ni | |
|---|---|---|---|---|---|---|---|---|
| 0Cr17Ni12Mo2 | ≤0.08 | ≤1.0 | ≤2.0 | ≤0.035 | ≤0.03 | ≤0.10 | 16.0-18.0 | 10.0-14.0 |
| 316 | ≤0.08 | ≤0.75 | ≤2.0 | ≤0.03 | 0.003 | ≤0.10 | 16.0-18.0 | 10.0-14.0 |
| X5CrNiMo17-12-2 | ≤0.07 | ≤1.0 | ≤2.0 | ≤0.015 | 0.006 | ≤0.11 | 16.5-18.5 | 10.0-13.0 |
| SUS316 | ≤0.08 | ≤1.0 | ≤2.0 | ≤0.045 | ≤0.03 | ≤0.10 | 16.0-18.0 | 10.0-14.0 |
| 08KH17H13M2T | ≤0.08 | ≤0.8 | ≤2.0 | ≤0.035 | ≤0.02 | 12.0-14.0 | 12.0-14.0 |
| Item | Parameters | ||||
|---|---|---|---|---|---|
| Tensile strength | 90,000 psi | ||||
| Yield strength | 45,000 psi | ||||
| Elongation | 35% | ||||
| Elastic modulus | 28,000,000 psi | ||||
| Density | .290 lbs/cubic inch | ||||
| Ball diameter variation | Spherical deviation | Surface roughness | Diameter variation | Diameter tolerance | |
|---|---|---|---|---|---|
| Grade | Vdws | △Sph | Ra | Vdwl | Tdn |
| Not Over | |||||
| μm | |||||
| 40 | 1 | 1 | 0.08 | 2 | * |
| 60 | 1.5 | 1.5 | 1 | 3 | * |
| 100 | 2.5 | 2.5 | 0.1 | 5 | ±12.5 |
| 200 | 5 | 5 | 0.15 | 10 | ±25 |
| 500 | 12.5 | 12.5 | * | 25 | ±50 |
| 1000 | 25 | 25 | * | 50 | ±125 |
Cold Heading of Stainless Steel Ball Blanks
The stainless steel wire is cut into controlled lengths and cold headed into spherical blanks. This cold-forming process improves material strength and creates the initial ball shape. AISI 316 and 316L are austenitic stainless steels, cold working may produce a slight magnetic response in the finished balls.
Flashing and Preliminary Grinding
The equatorial flash created during cold heading is removed. The ball blanks are then ground to improve roundness, reduce dimensional variation and prepare the surface for precision finishing.
Precision Grinding and Lapping
Controlled grinding and lapping processes gradually improve the diameter, sphericity and surface consistency of the precision stainless steel balls. Process parameters are adjusted according to the required ball size, tolerance and precision grade.
Polishing, Cleaning and Optional Passivation
The balls are polished to achieve the required surface finish and then thoroughly cleaned and dried. Passivation or additional surface treatment can be evaluated when specified by the customer.
Precision Measurement and Quality Inspection
The finished precision stainless steel balls are inspected using suitable measuring instruments to verify ball diameter, dimensional tolerance, roundness, surface finish, hardness and appearance.Inspection methods and documentation are confirmed according to the required precision grade, ball size and order specifications.
Automatic Sorting and Size Classification
After inspection, the finished balls are sorted and classified according to diameter and dimensional variation. This process improves lot consistency and helps ensure that the supplied 316 and 316L stainless steel balls meet the confirmed tolerance requirements.
Packaging and Batch Traceability
Qualified AISI 316/316L stainless steel balls are counted, batch identified and packed according to ball diameter, quantity and transportation requirements. Suitable inner and export packaging helps protect the balls from moisture, contamination and surface damage during storage and shipment.RISHENG can provide customized packaging, material certificates, inspection reports and batch-traceability documents according to the confirmed order requirements.
Changzhou Risheng Steel Ball Co., Ltd. is located on the eastern shore of Taihu Lake, adjacent to Shanghai, with convenient transportation. Since its establishment in June 1995, the company has been dedicated to developing and manufacturing steel balls, integrating research and development with trade.
For many years, Risheng building on the foundation of the Wujin Metal Ball Research Institute, has been committed to researching steel ball manufacturing technology. We primarily produce bearing steel balls (AISI 52100), stainless steel balls (AISI 201/304/316/420/440/430), and carbon steel balls (AISI 1015/1045/1085) with diameters ranging from 0.8mm to 25.4mm, with precision grades up to G10, G40, and G100. We also offer custom specifications for alloy steel balls, military steel balls, copper balls, UFO balls, ceramic balls, and other metal balls.
High-strength inner packaging: Shockproof foam bags or custom plastic boxes are used to secure each 316 stainless steel ball in place, protecting it from impacts and scratches.
Moisture-proof protection: A moisture-proofing agent is added to effectively prevent the impact of moisture on the product during transportation.
Sturdy outer packaging: Thickened corrugated cardboard boxes or wooden pallets (for large orders) are used to ensure safe long-distance transportation.
Clear labeling: Product specifications, quantity, and drop warnings are clearly marked on the outer packaging box for easy verification and safe handling.
After-Sales Service – A professional team is available to assist you at any time.
Strict Quality Control – Each production stage is thoroughly inspected by our QC team.
Professional Packaging – Secure packaging ensures safe delivery.
Free Samples – Available for quality confirmation before purchasing.
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