AISI 630 (17-4 PH) Stainless Steel Balls
Ball Bearing
High Strength, Heat Treatable & Corrosion Resistant
Our AISI 630 (17-4 PH) stainless steel ball range is engineered to deliver exceptional strength, excellent corrosion resistance, and outstanding mechanical performance after heat treatment. As a precipitation-hardening stainless steel, 17-4 PH offers a unique combination of high hardness, good toughness, and dimensional stability, making it ideal for demanding engineering and structural applications. At Atlas Ball & Bearing, we supply AISI 630 balls to precise specifications with full manufacturing capability and technical support.
150
Precision Ball Diameter
Why Choose AISI 630 (17-4 PH) Stainless Steel Balls?
AISI 630 (17-4 PH) stainless steel balls are designed for applications requiring very high strength combined with good corrosion resistance. They can be heat treated to achieve a wide range of mechanical properties, making them one of the most versatile precipitation-hardening stainless steels available.
Key Benefits
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Very high strength and hardness after heat treatment
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Good corrosion resistance in industrial and marine environments
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Excellent mechanical properties across a wide strength range
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High fatigue resistance under cyclic loading
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Good dimensional stability after hardening
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Suitable for high-load and safety-critical applications
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Strong wear resistance in demanding mechanical systems
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Reliable performance in structural and engineering applications
Manufacturing & Supply
We are capable of manufacturing and supplying loose AISI 630 (17-4 PH) 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 630 (17-4 PH) stainless steel balls are commonly used in applications requiring very high strength, good corrosion resistance, and excellent fatigue performance.
Typical applications include:
- Precision-engineered components
- Aerospace and aerospace structural systems
- Valve and pump components under high pressure
- Oil and gas industry equipment
- Marine and offshore engineering systems
- Industrial machinery and heavy-duty assemblies
- Fasteners and high-strength fittings
- Load-bearing and safety-critical mechanical systems
AISI 630 balls are available in a wide range of sizes and tolerances to meet both standard and precision engineering requirements, particularly where high strength and reliable performance are essential.
Why Atlas Ball & Bearing?
- UK-based manufacturer and supplier of precision-engineered stainless steel balls
- Extensive stock across stainless steel, duplex, and precipitation-hardening grades
- 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!