F51 (S31803) Stainless Steel Balls
Ball Bearing
Duplex Stainless Steel
Our F51 (S31803) stainless steel ball range is engineered for demanding applications requiring high mechanical strength and superior resistance to corrosion. Commonly known as Duplex Stainless Steel, F51 combines the beneficial properties of both austenitic and ferritic stainless steels, delivering outstanding toughness, stress corrosion resistance, and durability in harsh environments. At Atlas Ball & Bearing, we supply F51 (S31803) balls to precise specifications with full manufacturing capability and technical support.
150
Precision Ball Diameter
Why Choose F51 (S31803) Stainless Steel Balls?
F51 (S31803) stainless steel balls are designed for applications where high strength and excellent corrosion resistance are required. Their duplex structure provides greater resistance to stress corrosion cracking than standard austenitic grades while maintaining excellent mechanical performance.
Key Benefits
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High mechanical strength
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Excellent corrosion resistance
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Strong resistance to chloride-induced stress corrosion cracking
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Good resistance to pitting and crevice corrosion
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Excellent toughness and durability
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Suitable for marine and industrial environments
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Reliable long-term performance under demanding conditions
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Cost-effective alternative to higher alloy grades
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Consistent dimensional accuracy for precision engineering
Manufacturing & Supply
We are capable of manufacturing and supplying loose F51 (S31803) 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
F51 (S31803) stainless steel balls are commonly used in applications requiring a combination of strength, corrosion resistance, and reliability in aggressive operating environments.
Typical applications include:
- Offshore and subsea equipment
- Marine engineering systems
- Oil and gas equipment
- Pumps and valve assemblies
- Chemical processing systems
- Heat exchangers
- Water treatment equipment
- Precision industrial machinery
- Structural engineering applications
- General manufacturing and engineering systems
F51 (S31803) 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 are essential.
Why Atlas Ball & Bearing?
- UK-based manufacturer and supplier of precision-engineered stainless steel balls
- Extensive stock across specialist stainless steel grades and duplex alloys
- Consistent quality control and dimensional accuracy
- Technical support for demanding engineering applications
- Fast UK and international delivery
- Bespoke manufacturing to exact customer requirements
Related Materials
316 Stainless Steel Balls
F44 (S31254) Stainless Steel Balls
Biodur 108 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!