AISI 52100 Round Bar for Bearing and High-Wear Applications
Focus Keyword: AISI 52100 Round Bar
SEO Title: AISI 52100 Round Bar for Bearing and High-Wear Applications
SEO Meta Description: AISI 52100 Round Bar for bearings, shafts, rollers and high-wear components. Explore 100Cr6, SUJ2, UNS G52986, properties, heat treatment, sizes and supply in Mumbai.
Suggested URL:https://manansteel.com/aisi-52100-round-bar/
Secondary Keywords:
AISI 52100 Round Bar, 52100 Round Bar, SAE 52100 Round Bar, 52100 Bearing Steel, AISI 52100 Bearing Steel, 52100 Steel Bar, 52100 Steel Rod, 100Cr6 Round Bar, 100Cr6 Bearing Steel, SUJ2 Round Bar, UNS G52986 Round Bar, 52100 Alloy Steel, 52100 Steel Supplier, 52100 Round Bar Supplier, 52100 Round Bar Mumbai, 52100 Steel Stockist, 52100 Steel Dealer, 52100 Steel Manufacturer India, 52100 Chemical Composition, 52100 Mechanical Properties, 52100 Hardness, 52100 Heat Treatment, 52100 Annealing, 52100 Hardening, 52100 Bearing Applications, 52100 Bearing Steel Applications, 52100 Roller, 52100 Bearing Ring, 52100 Shaft, 52100 Wear Resistant Steel, 52100 High Carbon Steel, 52100 Price, 52100 Price Per Kg, AISI 52100 Equivalent, 100Cr6 Equivalent, SUJ2 Equivalent, Bearing Quality Steel Round Bar.
AISI 52100 Round Bar is a high-carbon chromium alloy steel widely associated with bearing applications and components requiring high hardness, wear resistance and rolling-contact fatigue performance.
The material is commonly identified through several designations, including:
- AISI 52100
- SAE 52100
- 100Cr6
- SUJ2
- UNS G52986
- DIN 1.3505
Technical references identify AISI 52100 as a high-carbon bearing steel, while ASTM A295 covers high-carbon anti-friction bearing steel.
For industrial buyers, the important question is not simply “What is 52100 steel?”
The more useful question is:
Where does AISI 52100 Round Bar make sense in an industrial component?
The answer often leads to bearings, rollers, races, precision shafts and other components exposed to repeated contact, friction and high mechanical loading.
Table of Contents
- What is AISI 52100 Round Bar?
- Why is 52100 called bearing steel?
- AISI 52100 equivalent grades
- 52100 steel chemical composition
- 52100 mechanical properties
- 52100 hardness
- 52100 wear resistance
- 52100 rolling-contact fatigue
- 52100 bearing applications
- 52100 bearing rings
- 52100 rollers
- 52100 shafts
- 52100 precision components
- 52100 heat treatment
- 52100 annealing
- 52100 hardening
- 52100 tempering
- 52100 machining
- 52100 grinding
- 52100 dimensional accuracy
- 52100 surface finish
- 52100 specifications
- 52100 testing and certification
- 52100 Round Bar sizes
- 52100 vs EN31
- 52100 vs 4140
- 52100 vs 100Cr6
- 52100 Round Bar price
- How to buy 52100 Round Bar
- 52100 Round Bar supplier in Mumbai
- Frequently asked questions
- Request a quotation
- Conclusion
What is AISI 52100 Round Bar?
AISI 52100 Round Bar is a high-carbon chromium alloy steel developed primarily for demanding bearing and wear-related applications.
Its characteristics make it useful where a component needs:
- High hardness
- Wear resistance
- Good rolling-contact fatigue performance
- Dimensional stability after appropriate heat treatment
- High strength
- Resistance to repeated mechanical contact
ASTM describes A295 as a specification covering high-carbon bearing-quality steel intended for the manufacture of anti-friction bearings.
Because of this, 52100 bearing steel is a particularly important search term for engineers and purchasing teams.
Why is 52100 Called Bearing Steel?
The grade has a long association with bearing manufacturing.
Bearings operate under repeated rolling and contact stresses.
The material used for a bearing race or rolling element therefore needs to withstand millions of loading cycles without premature surface or subsurface failure.
Steel cleanliness, carbide distribution, heat treatment and microstructure become extremely important.
Research published through ASTM specifically discusses steel cleanliness, inclusions, segregation and fatigue performance in GCr15/52100 bearing steel.
This is why purchasing a bearing-quality 52100 bar is not simply about obtaining a steel with the correct chemical composition.
AISI 52100 Equivalent Grades
Industrial buyers may encounter the following designations:
| Designation | Material Reference |
|---|---|
| AISI 52100 | American designation |
| SAE 52100 | SAE designation |
| 100Cr6 | European/German designation |
| SUJ2 | Japanese designation |
| UNS G52986 | UNS designation |
| DIN 1.3505 | German material number |
Technical material databases list these designations as associated with AISI 52100.
However, buyers should verify the applicable specification before treating any designation as an automatic substitute.
52100 Steel Chemical Composition
AISI 52100 is primarily an iron-based high-carbon chromium alloy.
Typical chemistry includes approximately:
| Element | Typical Range |
|---|---|
| Carbon | 0.98–1.10% |
| Chromium | 1.30–1.60% |
| Manganese | 0.25–0.45% |
| Silicon | 0.15–0.35% |
| Phosphorus | Controlled maximum |
| Sulfur | Controlled maximum |
| Iron | Balance |
Exact requirements depend on the applicable specification.
For an industrial purchase, the chemistry should be confirmed using the Material Test Certificate for the supplied heat.
52100 Mechanical Properties
Mechanical properties of 52100 depend heavily on the condition of the material.
Important properties include:
- Tensile strength
- Yield strength
- Hardness
- Elongation
- Modulus of elasticity
- Fatigue performance
- Wear resistance
After appropriate hardening and tempering, 52100 can reach high hardness levels required for bearing and wear applications.
Published material data show that heat-treated 52100 can reach very high Rockwell C hardness, depending on processing and section.
52100 Hardness
52100 hardness is one of the most common technical searches associated with the material.
The final hardness depends on:
- Austenitizing temperature
- Holding time
- Quenching method
- Section size
- Tempering temperature
- Material cleanliness
- Heat-treatment process
For bearing applications, the final hardness is critical because it influences wear and rolling-contact performance.
A buyer requiring a specific hardness should clearly mention it in the enquiry.
52100 Wear Resistance
High hardness makes 52100 suitable for many wear-related applications.
Potential uses include:
- Bearing components
- Rollers
- Guide components
- Bushings
- Wear rings
- Precision mechanical components
However, wear resistance is influenced by the entire manufacturing process.
Surface finish, lubrication, contact pressure and operating conditions can all affect component life.
52100 Rolling-Contact Fatigue
Rolling-contact fatigue is especially important in bearing applications.
A bearing component can experience repeated loading at the same contact region.
Over time, subsurface stresses can contribute to fatigue damage.
ASTM-published research on SAE 52100 has examined rolling-contact fatigue and the effect of material cleanliness and processing on bearing performance.
This is why bearing-quality steel is evaluated beyond basic tensile strength.
52100 Bearing Applications
AISI 52100 is strongly associated with anti-friction bearing manufacturing.
Potential components include:
- Bearing rings
- Inner races
- Outer races
- Rollers
- Balls
- Bearing components
- Precision rolling elements
The material is particularly suitable when high hardness and rolling-contact fatigue performance are required.
52100 Bearing Rings
Bearing rings require:
- High hardness
- Dimensional accuracy
- Surface quality
- Fatigue resistance
- Consistent microstructure
AISI 52100 can be used as a starting material for bearing rings that are subsequently machined and heat treated.
The quality of the starting bar can therefore influence the final component.
52100 Rollers
Rollers experience repeated contact with bearing races.
Depending on the bearing design, the rollers may be exposed to:
- High contact pressure
- Repeated rolling
- Friction
- Surface stresses
- Impact loading
52100 is widely associated with bearing rollers because its heat-treated properties are suitable for such demanding contact conditions.
52100 Shafts
Although 52100 is most strongly associated with bearings, it can also be considered for selected shafts and precision components.
The application should be evaluated carefully because the high carbon content and heat-treated condition make it different from more general-purpose engineering steels such as 4140.
Where very high wear resistance is important, 52100 can become an interesting material option.
52100 Precision Components
Precision engineering requires control over:
- Diameter
- Straightness
- Roundness
- Surface finish
- Hardness
- Dimensional stability
52100 is used in applications where the component’s final dimensions and surface condition are important.
Grinding and controlled heat treatment can therefore become essential stages in manufacturing.
52100 Heat Treatment
Heat treatment is one of the most important aspects of working with 52100.
A typical process may include:
- Annealing or spheroidizing
- Machining
- Austenitizing
- Quenching
- Tempering
- Grinding and finishing
The exact cycle should be established according to the material specification, component geometry and required properties.
Improper heat treatment can result in:
- Excessive distortion
- Cracking
- Incorrect hardness
- Retained austenite
- Undesirable carbide structure
52100 Annealing
52100 is often supplied or processed in an annealed condition to improve machinability.
Spheroidized structures are particularly relevant to bearing-steel processing because they provide a suitable starting microstructure for subsequent machining and hardening.
ASTM A295 specifically includes requirements related to spheroidized microstructure when annealing is specified.
52100 Hardening
Hardening is used to achieve the high hardness required for many bearing applications.
The process involves heating the steel into the appropriate austenitizing range followed by controlled quenching.
The exact process depends on:
- Diameter
- Furnace type
- Quenching medium
- Component geometry
- Required hardness
- Final application
Industrial heat treatment should always follow a qualified process rather than relying on a generic temperature from an internet table.
52100 Tempering
After hardening, tempering is generally used to adjust the final properties.
The tempering temperature affects:
- Hardness
- Toughness
- Dimensional stability
- Residual stresses
The correct tempering condition depends on the required application.
Bearing components require a carefully controlled combination of hardness and dimensional stability.
52100 Machining
Machining behaviour depends strongly on the supplied condition.
Annealed 52100 is significantly more suitable for conventional machining than fully hardened material.
Common operations include:
- Turning
- Drilling
- Milling
- Boring
- Threading
- Grinding
Once hardened, grinding is generally more appropriate for achieving final dimensions and surface finish.
52100 Grinding
Grinding becomes particularly important for precision bearing components.
A bearing race or roller may require extremely controlled:
- Diameter
- Roundness
- Surface finish
- Geometry
Grinding after heat treatment allows manufacturers to achieve the required final dimensions.
Grinding parameters must be controlled carefully to avoid excessive heat and surface damage.
52100 Dimensional Accuracy
Industrial buyers should not specify only:
“52100 Round Bar.”
For precision applications, the enquiry should also mention:
- Nominal diameter
- Diameter tolerance
- Length
- Straightness
- Roundness
- Surface finish
- Condition
The required tolerances can vary substantially between a general engineering component and a bearing component.
52100 Surface Finish
Surface condition can influence subsequent machining and final component quality.
Possible requirements may include:
- Hot rolled
- Cold finished
- Peeled
- Ground
- Centreless ground
- Polished
For bearing manufacturing, the final component surface is usually much more tightly controlled than the starting stock.
52100 Specifications
AISI 52100 is associated with several material and product standards.
ASTM A295 is specifically identified as the Standard Specification for High-Carbon Anti-Friction Bearing Steel.
Other specifications may be encountered depending on the product form, customer requirement and country of supply.
The purchase order should clearly identify:
Grade + Standard + Product Form + Condition
This avoids confusion between different high-carbon bearing steels.
52100 Testing and Certification
Industrial buyers may request:
- Chemical analysis
- Tensile testing
- Hardness testing
- Microstructure examination
- Ultrasonic testing
- Inclusion rating
- Dimensional inspection
- Surface inspection
- Heat number traceability
- Material Test Certificate
For bearing-quality material, internal cleanliness and carbide structure can be particularly important.
ASTM research has highlighted the relationship between non-metallic inclusions, segregation, steel cleanliness and fatigue properties in 52100 bearing steel.
52100 Round Bar Sizes
AISI 52100 Round Bar may be required in a wide range of diameters.
When sending an enquiry, specify:
Diameter: ______ mm
Length: ______ mm
Quantity: ______ kg
Condition: ______
Finish: ______
Tolerance: ______
Standard: ______
Testing: ______
For non-standard dimensions, availability should be confirmed before order placement.
52100 vs EN31
EN31 is another commonly searched designation in India and engineering markets for a high-carbon chromium bearing steel.
AISI 52100 and EN31 are often discussed together because of their similar application areas.
However, buyers should verify:
- Chemical composition
- Applicable standard
- Heat-treatment condition
- Product form
- Certification
before treating them as interchangeable.
52100 vs 4140
AISI 52100 and 4140 are both alloy steels, but they are designed around different engineering priorities.
52100 is strongly associated with:
- Bearings
- High hardness
- Wear resistance
- Rolling-contact fatigue
4140 is widely used for:
- Shafts
- Gears
- Bolts
- Machinery components
- General high-strength engineering parts
Choosing between them should depend on the component’s actual requirements.
52100 vs 100Cr6
For many industrial searches, 52100 and 100Cr6 appear together.
100Cr6 is a European designation associated with the same general bearing-steel family.
Material databases list SAE 52100, 100Cr6 and related designations together.
However, always confirm the exact standard and certificate required by the customer.
52100 Round Bar Price
52100 Round Bar Price depends on:
- Diameter
- Quantity
- Condition
- Surface finish
- Manufacturing route
- Certification
- Testing
- Stock availability
- Market conditions
Bearing-quality steel can require tighter quality controls than ordinary engineering steel.
Therefore, the lowest quoted price should not automatically be treated as the best purchasing option.
For a reliable quotation, send the exact specification and quantity.
How to Buy 52100 Round Bar
A good industrial enquiry should look like this:
Material: AISI 52100
Equivalent: 100Cr6 / SUJ2, if required
Product: Round Bar
Diameter: ______ mm
Length: ______ mm
Quantity: ______ kg
Condition: Annealed / Hardened / Other
Finish: ______
Tolerance: ______
Standard: ______
Testing: ______
Certificate: ______
Application: Bearing / Roller / Shaft / Other
This gives the supplier enough information to identify the correct material and prepare a meaningful quotation.
52100 Round Bar Supplier in Mumbai
Companies searching for a 52100 Round Bar Supplier in Mumbai may encounter several different material descriptions online.
Before purchasing, confirm:
- AISI/SAE 52100 designation
- Applicable standard
- Chemical composition
- Material condition
- Diameter
- Length
- Surface condition
- Testing
- Certification
- Quantity
Manan Steel & Metals supplies alloy steels, stainless steels, nickel alloys and specialty metal products for industrial requirements.
For AISI 52100 Round Bar, buyers can share their required diameter, quantity and specification for availability and quotation.
Frequently Asked Questions
What is AISI 52100 Round Bar?
AISI 52100 Round Bar is a high-carbon chromium alloy steel widely used for bearing and high-wear applications.
Is 52100 a bearing steel?
Yes. It is one of the well-known high-carbon bearing steels and is covered by ASTM A295 for high-carbon anti-friction bearing steel.
What is the equivalent of 52100 steel?
Commonly associated designations include 100Cr6, SUJ2 and UNS G52986.
What is 52100 steel used for?
Typical applications include bearing rings, rollers, rolling elements, precision components and selected wear-resistant mechanical parts.
Is 52100 harder than 4140?
After suitable heat treatment, 52100 can achieve very high hardness levels. The comparison with 4140 depends on the specific heat-treated condition and application.
Can 52100 be machined?
Yes. Machining is generally performed more readily in annealed or spheroidized condition. Hardened 52100 is commonly finished through grinding.
What is 52100 hardness?
The final hardness depends on the heat-treatment condition. Hardened bearing-quality 52100 can reach high Rockwell C hardness levels.
What is 52100 Round Bar price?
Price depends on diameter, quantity, condition, finish, certification, testing and availability.
Where can I buy 52100 Round Bar in Mumbai?
Contact Manan Steel & Metals with the required size, quantity and specification for availability and quotation.
Request a Quotation
Material: AISI 52100
Product: Round Bar
Equivalent: 100Cr6 / SUJ2
Diameter: ______ mm
Length: ______ mm
Quantity: ______ kg
Condition: ______
Finish: ______
Tolerance: ______
Standard: ______
Testing: ______
MTC: Required / Not Required
Application: ______
Manan Steel & Metals
Shop No. 2, Hira Building,
97 Khetwadi Main Road (Nanubhai Desai Road),
Girgaon, Mumbai – 400004,
Maharashtra, India.
Phone: 7977369869
Email: manansteel@gmail.com
Conclusion
AISI 52100 Round Bar is a specialized engineering steel with a particularly strong connection to bearing manufacturing and high-wear applications.
Its combination of high carbon content, chromium alloying, hardenability and achievable hardness makes it suitable for components exposed to repeated contact and demanding mechanical conditions.
For bearing rings, rollers and other rolling-contact components, the quality of the starting material matters just as much as the final heat treatment. Steel cleanliness, carbide distribution, microstructure and processing can all influence fatigue performance. ASTM-published research has specifically examined these factors in 52100 bearing steel.
For procurement teams, the material should therefore be ordered using more than simply the phrase “52100 steel.” The grade, applicable standard, condition, diameter, tolerance, testing and certification requirements should all be established before purchase.
For companies searching for AISI 52100 Round Bar Supplier, SAE 52100 Round Bar, 100Cr6 Round Bar, SUJ2 Round Bar, UNS G52986, 52100 Bearing Steel, 52100 Price, 52100 Round Bar Supplier Mumbai or Bearing Quality Steel, Manan Steel & Metals can evaluate the requirement and provide availability based on the required specification.
Send your complete size and quantity requirement for a quotation.
🔗 OUTBOUND LINKS — ADD THESE TO WORDPRESS
This section is important because you specifically told me your SEO plugin was showing:
“No outbound links were found.”
So for this blog, add the following follow links.
1. ASTM International
Anchor text: ASTM A295
Direct link: ASTM A295 — High-Carbon Anti-Friction Bearing Steel
Place under: 52100 Specifications
Suggested sentence:
AISI 52100 bearing-quality steel requirements can be researched through the applicable ASTM A295 specification.
ASTM describes A295 as covering high-carbon bearing-quality steel for anti-friction bearings.
2. MatWeb
Anchor text: AISI 52100 material data
Direct link: AISI 52100 material data
Place under: AISI 52100 Equivalent Grades
This is useful for readers researching the relationship between 52100, 100Cr6, SUJ2 and UNS G52986.
3. ASTM Research
Anchor text: 52100 bearing steel research
Direct link: 52100 bearing steel research
Place under: 52100 Rolling-Contact Fatigue
This gives industrial researchers a credible external resource discussing cleanliness, inclusions, segregation and fatigue properties in 52100/GCr15 bearing steel.
⚠️ WordPress setting
When you insert these links:
Highlight text → Ctrl + K → paste link → Apply
Then check the link settings and make sure you DO NOT select “nofollow.”
You want the HTML relationship to remain a normal followed external link.
🔗 INTERNAL LINKING PLAN
Once your corresponding Manan Steel pages are live, add internal links naturally to:
- 4140 Round Bar
- EN1A Leaded Round Bar
- Bright Steel Bars
- Stainless Steel Round Bars
- Monel 400 Round Bar
- Nitronic 50 Round Bar
- Nickel Alloy Products
For example, inside the 52100 vs 4140 section:
If the application requires a more general-purpose high-strength alloy steel, buyers can also compare 4140 Round Bar based on the component requirements.
This creates a useful internal product network rather than randomly adding links.
🖼️ IMAGE PLAN
Use your own Manan Steel & Metals photographs wherever possible.
Featured Image
ALT: AISI 52100 Round Bar supplier in Mumbai
Image 2
ALT: 52100 bearing steel round bar
Image 3
ALT: 100Cr6 AISI 52100 bearing steel bar
Image 4
ALT: AISI 52100 round bar for bearing components
Image 5
ALT: 52100 steel round bar industrial stock
Image 6
ALT: 52100 bearing steel machined components
🎯 SEO KEYWORD STRUCTURE
The primary keyword is:
AISI 52100 Round Bar
But this article deliberately captures multiple buyer-intent searches:
Commercial searches
- 52100 Round Bar Supplier
- 52100 Supplier Mumbai
- 52100 Steel Stockist
- 52100 Steel Dealer
- 52100 Price
- 52100 Price Per Kg
Technical searches
- 52100 Chemical Composition
- 52100 Mechanical Properties
- 52100 Hardness
- 52100 Heat Treatment
- 52100 Annealing
- 52100 Hardening
Equivalent-material searches
- 100Cr6 Round Bar
- SUJ2 Round Bar
- UNS G52986
- EN31
- 52100 Equivalent
Application searches
- 52100 Bearing Steel
- 52100 Bearing Ring
- 52100 Roller
- 52100 Shaft
- Bearing Quality Steel
That combination is much more useful for industrial buyers, engineers, manufacturers and researchers than simply repeating “AISI 52100 Round Bar” dozens of times.