AISI 329 Stainless Steel Balls
Ball Bearing
High Strength Duplex Corrosion Resistance
Our AISI 329 stainless steel ball range is engineered to deliver excellent strength, superior corrosion resistance, and outstanding performance in aggressive environments. As a duplex stainless steel, AISI 329 combines austenitic and ferritic properties, offering higher mechanical strength and improved resistance to stress corrosion cracking compared to standard stainless grades. At Atlas Ball & Bearing, we supply AISI 329 balls to precise specifications with full manufacturing capability and technical support.
150
Precision Ball Diameter
Why Choose AISI 329 Stainless Steel Balls?
AISI 329 stainless steel balls are designed for applications requiring a combination of high mechanical strength and enhanced corrosion resistance, particularly in chloride-rich or harsh industrial environments. Their duplex structure provides improved resistance to stress corrosion cracking and better durability under load compared to conventional austenitic grades.
Key Benefits
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High strength compared to standard austenitic stainless steels
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Excellent resistance to stress corrosion cracking
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Strong performance in chloride and marine environments
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Good wear resistance under load conditions
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Improved durability in aggressive industrial applications
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Suitable for high-stress mechanical assemblies
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Long service life in demanding environments
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Reliable dimensional accuracy for precision engineering
Manufacturing & Supply
We are capable of manufacturing and supplying loose AISI 329 stainless steel balls in nearly every variation of grade, maintaining an extensive stock with sizes ranging from 0.2mm to 150mm in diameter.
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Additionally, we offer a bespoke ball manufacturing service, which follows the same process controls and traceability but uses a customer’s own material. For further details, please email us or call +44 (0) 1922 710515.
Applications
AISI 329 stainless steel balls are commonly used in applications requiring high strength and excellent corrosion resistance in aggressive or chloride-rich environments.
Typical applications include:
- Precision-engineered components
- Marine and offshore equipment
- Chemical processing systems
- Pump and valve assemblies
- Industrial machinery exposed to corrosive conditions
- Structural and high-load mechanical systems
- Oil and gas applications
- Heavy-duty engineering assemblies
AISI 329 balls are available in a wide range of sizes and tolerances to meet both standard and precision engineering requirements, particularly where strength and corrosion resistance must be maintained under demanding conditions.
Why Atlas Ball & Bearing?
- UK-based manufacturer and supplier of precision-engineered stainless steel balls
- Extensive stock across a wide range of stainless steel grades including duplex alloys
- Consistent quality control and dimensional accuracy
- Technical support for advanced engineering applications
- Fast UK and international delivery
- Bespoke manufacturing to exact customer requirements
Related Materials
Nitronic 50 Balls
440C Stainless Steel Balls
316 Stainless Steel Balls
Useful terms and definitions
Batch or Lot:
A defined quantity of balls manufactured under conditions presumed to be uniform and which is considered an entity.
Nominal Ball Diameter:
The diameter value that is used for the general identification of a ball size.
Single Ball Diameter:
The distance between two parallel planes tangential to the actual ball surface.
Diameter Tolerance per Batch:
The allowed difference between the smallest measured ball diameter and the largest ball diameter within the same batch or lot quantity.
Sphericity:
A measure of roundness expressed as the difference between the measured roundness of a ball and a theoretically perfectly round ball.
Surface Finish or Roughness:
A measure of the texture of a surface. It is quantified by the vertical deviations of the actual surface from its ideal form. If these deviations are large, the surface is rough; if they are small, the surface is smooth.
Ball Grades
| Grade | Diameter Tolerance per Ball | Sphericity | Diameter Tolerance per Unit Container | Basic Diameter Tolerance | Maximum Surface Roughness Micro | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Inch | µ | Inch | µ | Inch | µ | Inch | µ | Inch | µ | |
| 3 | .000003 | 0.076 | .000003 | 0.076 | .000005 | 0.127 | ±.00003 | ± 0.076 | 0.5 | 0.013 |
| More details about Grade 3... | ||||||||||
| 5 | .000005 | 0.127 | .000005 | 0.127 | .00001 | 0.25 | ±.00005 | ± 0.127 | 0.8 | 0.02 |
| More details about Grade 5... | ||||||||||
| 10 | .000010 | 0.25 | .000010 | 0.25 | .00002 | 0.51 | ±.0001 | ± 2.5 | 1.0 | 0.025 |
| More details about Grade 10... | ||||||||||
| 15 | .000015 | 0.38 | .000015 | 0.38 | .00003 | 0.76 | ±.0001 | ± 2.5 | 1.2 | 0.03 |
| More details about Grade 15... | ||||||||||
| 25 | .000025 | 0.63 | .000025 | 0.63 | .00005 | 1.27 | ±.0001 | ± 2.5 | 1.5 | 0.038 |
| More details about Grade 25... | ||||||||||
| 50 | .00005 | 1.27 | .00005 | 1.27 | .0001 | 2.5 | ±.0002 | ± 5 | 3.0 | 0.075 |
| More details about Grade 50... | ||||||||||
| 100 | .0001 | 2.5 | .0001 | 2.5 | .0002 | 5 | ±.0005 | ± 5 | 5.0 | 0.125 |
| More details about Grade 100... | ||||||||||
| 200 | .0002 | 5 | .0002 | 5 | .0004 | 10 | ±.0010 | ± 10 | 8.0 | 0.2 |
| More details about Grade 200... | ||||||||||
| 300 | .0003 | 7.5 | .0003 | 7.5 | .0006 | 15 | ±.0015 | ± 37.5 | N/A | N/A |
| More details about Grade 300... | ||||||||||
| 500 | .0005 | 12.5 | .0005 | 12.5 | .001 | 25 | ±.002 | ± 50 | N/A | N/A |
| More details about Grade 500... | ||||||||||
| 1000 | .001 | 25 | .001 | 25 | .002 | 50 | ±.005 | ± 125 | Not Applicable | Not Applicable |
| More details about Grade 1000... | ||||||||||
| 2000 | .002 | 50 | .002 | 50 | .004 | 100 | ±.005 | ± 125 | N/A | N/A |
| More details about Grade 2000... | ||||||||||
Sample Our Work!
Take the first step towards precision and quality with our expert services. At Atlas Ball & Bearing, we’re committed to delivering top-notch precision balls and rollers for a wide range of industries, including gas, oil, medical, and transportation. Our dedicated team is ready to assist you with custom solutions tailored to your specific needs. Experience the Atlas Ball & Bearing difference now!