| Item | Available Specification |
|---|---|
| Material | AISI 420 martensitic stainless steel |
| Ball Diameter | 0.8–25.4 mm; metric and inch sizes |
| Hardness | Typically HRC 50–55 after heat treatment |
| Precision Grade | G10–G1000 |
| Phosphorus (P) | ≤0.040% |
| Sulfur (S) | ≤0.030% |
| Element | Reference Content |
|---|---|
| Carbon (C) | ≥0.15% |
| Chromium (Cr) | 12.0–14.0% |
| Manganese (Mn) | ≤1.00% |
| Silicon (Si) | ≤1.00% |
| Phosphorus (P) | ≤0.040% |
| Sulfur (S) | ≤0.030% |
| Buyer Requirement | |
|---|---|
| Carbon (C) | ≥0.15% |
| Chromium (Cr) | 12.0–14.0% |
| Manganese (Mn) | ≤1.00% |
| Silicon (Si) | ≤1.00% |
| Phosphorus (P) | ≤0.040% |
| Sulfur (S) | ≤0.030% |
Raw Material Verification
RISHENG reviews the drawing number and revision, AISI 420 material designation, nominal diameter, ball grade or dimensional tolerance, required hardness, surface condition, order quantity and intended application. Missing, unclear or conflicting requirements are identified for clarification.
Manufacturing Feasibility Evaluation
Our production team evaluates whether the required diameter, tolerance, hardness and surface finish can be produced consistently. Tooling, heat-treatment conditions, finishing requirements, order quantity and other production factors are reviewed before the order is accepted for manufacturing.
Production Specification Confirmation
The confirmed material condition, dimensions, tolerance or ball grade, hardness range, surface requirements, quantity and packaging instructions are recorded as the production basis. Inspection and documentation requirements are transferred to the agreed inspection plan.
Sample or First-Article Approval
For a new diameter, non-standard tolerance or application-specific requirement, sample production or first-article inspection can be arranged. The sample quantity, approval criteria and confirmation method should be agreed before mass production.
Hardness Inspection
Hardness is checked after heat treatment according to the confirmed hardness scale, required range and sampling plan. Rockwell or Vickers hardness testing can be specified according to the ball size and inspection requirement.
Finished AISI 420 stainless steel balls are submitted for final inspection under the agreed quality-control plan. Products are released for packaging and shipment only after the applicable acceptance requirements have been completed.
Changzhou Risheng Steel Ball Co., Ltd. manufactures precision steel balls for industrial buyers, distributors and OEM customers. Our production capabilities cover cold heading, grinding, heat treatment coordination, polishing, sorting and final inspection.
For AISI 420 stainless steel ball orders, we review the material grade, diameter, hardness, precision grade, surface finish, quantity and inspection requirements before production. This specification-based process helps ensure that manufacturing and inspection follow the requirements agreed with the customer.
Our role is not limited to supplying a nominal ball diameter. Each custom order is reviewed against its own material, tolerance, hardness, surface, inspection and packaging requirements before production.
High-strength inner packaging: Shockproof foam bags or custom plastic boxes are used to secure each 420/420C 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.
FAQ About Custom AISI 420 Stainless Steel Ball
Non-standard metric and inch diameters can be reviewed according to the required tolerance, order quantity, tooling feasibility and estimated annual demand.
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