| AISI | GB/T 699 | JIS G4051 | EN 10130 | EN 10263-2 |
|---|---|---|---|---|
| 1010 | 10 (10#) | S10C | DC01 | C10C |
| 1015 | 15 (15#) | S15C |
Chemical Composition
| Grade | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| AISI 1010 | 0.08–0.13% | ≤0.10% | 0.30–0.60% | ≤0.040% | ≤0.050% |
| AISI 1015 | 0.13–0.18% | ≤0.10% | ≤0.60% | ≤0.045% | ≤0.050% |
| Property | Soft annealed | Case-hardened (carburized) | ||||
|---|---|---|---|---|---|---|
| Surface hardness | HRB 55–75 | HRC 55–65 | ||||
| Case depth | — | 0.4–1.1 mm, depending on ball diameter | ||||
| Core condition | Ductile | Tough, ductile core | ||||
| Density | 7.85 g/cm³ | 7.85 g/cm³ | ||||
| Ball diameter variation | Spherical deviation | Surface roughness | Diameter variation | Diameter tolerance | |
|---|---|---|---|---|---|
| Grade | Vdws | △Sph | Ra | Vdwl | Tdn |
| Not Over | |||||
| μm | |||||
| 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 |
| Dia. (mm) | Inch | Approx. Weight per Ball (g) | ||||
|---|---|---|---|---|---|---|
| 2.0 | — | 0.033 | ||||
| 3.0 | — | 0.111 | ||||
| 3.175 | 1/8" | 0.132 | ||||
| 4.7625 | 3/16" | 0.444 | ||||
| 5.0 | — | 0.514 | ||||
| 6.0 | — | 0.888 | ||||
| 6.35 | 1/4" | 1.052 | ||||
| 7.9375 | 5/16" | 2.056 | ||||
| 8.0 | — | 2.104 | ||||
| 9.525 | 3/8" | 3.551 | ||||
| 10.0 | — | 4.110 | ||||
| 12.7 | 1/2" | 8.420 | ||||
| 15.875 | 5/8" | 16.45 | ||||
| 19.05 | 3/4" | 28.41 | ||||
| 25.4 | 1" | 67.35 | ||||
Every low carbon steel ball starts from certified raw material. RISHENG sources low carbon steel wire rod (AISI 1010 / S10C / DC01) from qualified mills with controlled sulphur and phosphorus content for defect-free forming.
- Wire rod is cut into precise slugs and cold-headed into ball blanks on our Z32-7.5 machines
- Cold forming keeps the metal fiber flow continuous — a stronger internal structure than machined balls
- This step defines the ball's initial size and grain structure
- Cold-headed blanks carry a thin equator ridge ("flash") left by the forming dies
- Balls are rolled between heavy cast-iron file plates to remove the ring band
- Result: a uniform, near-spherical blank ready for grinding
Before heat treatment, the soft blanks are ground on our M360 machines to
remove the flashing marks and bring the diameter close to size, leaving a
uniform grinding allowance for the hardened finish passes.
Unlike chrome steel balls, low carbon steel balls are case-hardened through carburizing. In our heat treatment workshop, balls are heated in a controlled carbon-rich atmosphere at approximately 900-930°C, allowing carbon to diffuse into the surface layer. After quenching and tempering, the balls achieve a hard wear-resistant surface (HRC 55-65) while keeping a tough, ductile core - ideal for impact loads in casters and slides. For customers who need soft balls for riveting or stamping, we skip hardening and supply annealed low carbon steel balls at wholesale prices.
Hard grinding is the method of grinding the ball after heat treatment with grinding wheel in the grinding machine. Its role is to further improve the accuracy and surface quality.
- For G100 and G200 orders, balls are lapped with fine abrasive. G500 and G1000 balls are finished by grinding and polishing.
- Achieves final diameter tolerance, sphericity and surface roughness per ISO 3290
- Mirror-smooth finish for precision applications
Multi-stage degreasing removes grinding fluid and residues before inspection
Automatic sorting machines screen every ball by diameter
Surface-defect sorting plus visual inspection remove any out-of-tolerance balls
Nothing is sampled — 100% of balls are sorted
- QC verifies diameter variation, sphericity, surface roughness and hardness with calibrated measuring instruments
- Eddy current testing (ECT) detects surface cracks and hidden defects
- An inspection report is issued for each batch of low carbon steel balls
Consistent Dimensional Accuracy: Our low carbon steel balls span grades G100 to G1000 and maintain strict diameter tolerances, ensuring smooth assembly line operations and minimizing downtime losses..
Optimized Surface Finish: Each steel ball undergoes professional deburring and precision polishing, effectively lowering the equipment friction coefficient and reducing component wear..
Superior Rust Protection: Addressing the potential risks associated with maritime transport for low-carbon steel, we coat all export products with high-grade moisture-proof, anti-rust oil; this ensures the goods arrive at your warehouse in pristine, "like-new" condition after long-haul shipping.
Global Compliance: Our production strictly adheres to international environmental regulations—including RoHS and REACH standards—ensuring a seamless and compliant import customs clearance process.
Risheng has made precision balls in Wujin District, Changzhou since June 1995, on a 5,000 m² automated line — cold heading, carburizing heat treatment,grinding, lapping and 100% sorting all in-house. We export to North America,Europe, Southeast Asia, South America and the Middle East on FOB, CIF, CFR terms.
For OEM orders we run custom metric and imperial diameters, customer-specified chemistry, either ball condition, and private labelling with your part numbers.
Material test reports and dimensional inspection reports ship with every batch;SGS or BV inspection at the factory is welcome.
High-strength inner packaging: Shockproof foam bags or custom plastic boxes are used to secure each low carbon 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.
ISO 9001:2015 – Certified Quality Management System
IATF 16949 – Quality Management System for the Automotive Industry
ISO 14001:2015 – Environmental Management System Certification
RoHS & REACH Compliant – Ensuring material safety and environmental protection
PRODUCTS
CONTACT US
