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Company Profile
We are a manufacturing and trade combo company with 20 years of experience in steel balls. Our steel ball plant was founded in 1998 and has already received an ISO9001:2015 certificate. We can supply carbon steel balls, chrome steel balls, plastic balls, ceramic balls, and rollers according to our customer's requirements. So far, we have exported to many countries such as the USA, UK, Italy, Germany, Russia, Brazil, France, Peru, South Africa, etc.
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Product Description
Stainless steel balls Applications:
• 300 Series: Used in trigger sprayers, bearings, dispenser valves, body jewelry lotion pumps, etc.
• 400 Series: Primarily used in bearing applications, valves, locking mechanisms, fasteners, and more.
| AISI Number |
C% |
Si% |
Mn% |
Cr% |
Ni% |
Mo% |
P% |
S% |
Property |
| AISI 304 | 0.07 MAX | 1.00 MAX | 2.00 MAX | 17.0-19.0 | 8.0-10.5 | - | 0.045 MAX | 0.03 MAX | Slightly magnetic, HRC 25min. |
| AISI 316 | 0.07 MAX | 1.00 MAX | 2.00 MAX | 16.5-18.5 | 10.5-13.5 | 2.0-2.5 | 0.045 MAX | 0.03 MAX | Better corrosion resistance than SS304. |
| AISI 420 | 0.07-0.25 | 1.00 MAX | 1.00 MAX | 12.0-14.0 | - | - | 0.045 MAX | 0.03 MAX | Magnetic, martensite steel, HRC 50min. |
| AISI 430 | 0.08 MAX | 1.00 MAX | 1.00 MAX | 15.5-17.5 | - | - | 0.045 MAX | 0.03 MAX | Ferritic stainless steel. |
| AISI 440 | 0.95-1.20 | 1.00 MAX | 1.00 MAX | 16.0-18.0 | - | - | 0.045 MAX | 0.02 MAX | Martensite, fair corrosion to water/oil. |
Hardness: HRC25-39 (without demagnetization); special hardness available.
Ball Surface: Bright, Zero Defect.
Certification: ISO 9001:2015, RoHS, SGS.
Service: Instant improvement, quick response, inspection reports, traceable logistics.
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Standard Packaging Steps
Step 1: Weighing stainless steel balls (Usually 10kg).
Step 2: Sealed plastic bags.
Step 3: Put sealed plastic bags into small boxes.
Step 4: Labeling each box (Material, Lot No, Size, Qty, Grade).
Step 5: Boxes placed into plywood cases.
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Frequently Asked Questions
What types of steel balls do you provide?
We supply a wide range including carbon steel balls, chrome steel balls, stainless steel balls (300/400 series), plastic balls, ceramic balls, and rollers.
What is the difference between 304 and 316 stainless steel balls?
AISI 316 balls contain molybdenum, providing better corrosion resistance than AISI 304, especially against sulfuric acid and ink/nitric environments.
Can you provide custom hardness for the balls?
Yes, while our standard hardness is HRC25-39, we can manufacture special hardness levels according to specific customer requirements.
What quality certifications do your products have?
Our manufacturing processes are ISO 9001:2015 certified, and our products meet RoHS and SGS safety standards.
Do you offer free samples?
Yes, we provide free samples for quality evaluation before placing a bulk order.
How do you ensure product traceability?
Each packaging box includes a detailed label with the material grade, Lot number, size, and production date for full traceability.
RPZ Valve
