EN31 Round Bar Supplier Mumbai for Bearing, Tool and Wear-Resistant Applications
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Meta Description: EN31 Round Bar Supplier Mumbai supplying EN31 100Cr6 bearing steel for rollers, bushes, shafts, gears, tooling and high-wear engineering components.
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Table of Contents
- What Is EN31 Round Bar?
- EN31 Steel Grade and 100Cr6
- EN31 Chemical Composition
- EN31 Round Bar Mechanical Properties
- Why EN31 Is Used for Wear-Resistant Components
- EN31 Round Bar Applications
- EN31 Heat Treatment
- EN31 Machining
- EN31 Round Bar Sizes and Finishes
- EN31 Round Bar Specifications
- What Affects EN31 Round Bar Price?
- How to Buy EN31 Round Bar
- EN31 Round Bar Supplier in Mumbai
- Frequently Asked Questions
- Request a Quote
What Is EN31 Round Bar?
EN31 Round Bar is a high-carbon chromium alloy steel widely used for applications requiring high hardness, wear resistance and dimensional stability after suitable heat treatment.
EN31 is commonly associated with 100Cr6, 1.3505 and bearing-steel applications. Ovako identifies 100Cr6 as a through-hardening bearing steel intended for rolling contact and other high-fatigue applications. Its technical data also lists 1.3505 and 100Cr6 among the similar designations. Read the Ovako 100Cr6 technical data.
The material is particularly suitable when the finished component must withstand repeated contact, rolling loads or abrasive wear.
Typical applications include:
- Bearing components
- Rollers
- Bushes
- Shafts
- Pins
- Gears
- Guide components
- Precision machine parts
- Wear-resistant tooling
EN31 Steel Grade and 100Cr6
A buyer may encounter EN31, 100Cr6, 1.3505 or other related designations while sourcing the material.
These names should not simply be mixed together without checking the applicable specification.
Ovako lists 100Cr6 with similar designations including 1.3505, SAE 52100, 100Cr6, SUJ2 and GCr15.
For an industrial purchase, it is better to state the exact designation required by the drawing or customer specification.
A typical enquiry can state:
Material: EN31
Grade: 100Cr6
Product: Round Bar
Diameter: Required size
Length: Required length
Condition: Annealed / Hardened & Tempered / As Required
Finish: Bright / Ground / Peeled / Turned
Quantity: Required quantity
For technical information about international steel standards, buyers can also consult ISO when the project specifies an ISO material standard.
EN31 Chemical Composition
EN31 is a high-carbon chromium steel.
For 100Cr6 under EN ISO 683-17, Ovako publishes a chemical-composition range approximately as follows:
| Element | Approximate Range |
|---|---|
| Carbon (C) | 0.93–1.05% |
| Silicon (Si) | 0.15–0.35% |
| Manganese (Mn) | 0.25–0.45% |
| Chromium (Cr) | 1.35–1.60% |
| Phosphorus (P) | 0.025% max |
| Sulphur (S) | 0.015% max |
| Molybdenum (Mo) | Up to 0.10% |
| Iron (Fe) | Balance |
The exact composition depends on the applicable specification and material variant.
The combination of approximately 1% carbon and 1.4–1.6% chromium is important to the material’s ability to develop high hardness and wear resistance after suitable heat treatment.
For purchased material, the Mill Test Certificate (MTC) should be used to verify the actual chemistry.
EN31 Round Bar Mechanical Properties
EN31 is generally selected for its ability to develop high hardness and strength after heat treatment.
The final mechanical properties depend on:
- Diameter
- Heat-treatment cycle
- Austenitizing temperature
- Quenching method
- Tempering condition
- Surface treatment
For this reason, there is no single mechanical-property value that applies to every EN31 Round Bar.
Important characteristics include:
| Property | Importance |
|---|---|
| Hardness | Important for wear resistance |
| Tensile Strength | Load-bearing capability |
| Fatigue Strength | Important for rolling-contact components |
| Dimensional Stability | Important for precision parts |
| Hardenability | Determines achievable hardness through the section |
| Wear Resistance | Important for bearings and high-contact components |
Ovako describes 100Cr6 as a through-hardening bearing steel intended for rolling contact and high-fatigue applications, with high hardness and strength after hardening.
For critical engineering parts, use the certified values for the actual heat-treated condition rather than generic online numbers.
Why EN31 Is Used for Wear-Resistant Components
The main reason engineers select EN31 is its ability to develop a combination of high hardness, strength and wear resistance.
The material’s high carbon and chromium levels make it suitable for hardened components exposed to repeated contact.
This is particularly valuable in components where surface wear can directly affect service life.
Examples include:
Rolling contact:
Bearing components experience repeated rolling and contact stresses.
Sliding contact:
Bushes, guides and selected machine parts can benefit from a hardened wear-resistant surface.
Precision applications:
EN31 can be used where dimensional stability after heat treatment is important.
High-cycle service:
Bearing steel applications can involve millions of loading cycles, making material cleanliness, processing and heat treatment important.
Ovako specifically describes 100Cr6 as a bearing steel for high-cycle, high-stress fatigue applications. See the Ovako 100Cr6 bearing-steel information.
EN31 Round Bar Applications
Bearing Components
One of the primary uses of 100Cr6-type steel is manufacturing rolling-bearing components.
These can include:
- Bearing rings
- Rollers
- Balls
- Raceways
- Other precision bearing components
Rollers
EN31 can be used for selected rollers that require high hardness and resistance to repeated contact.
Bushes
Hardened EN31 components can provide useful resistance to mechanical wear.
Shafts
For selected precision shafts and pins, EN31 can provide a high-hardness surface after heat treatment.
Gears
The grade can be used for selected gear components where wear resistance and hardness are important.
Dies and Tooling
EN31 is also used in selected tooling and wear-resistant applications.
Precision Machine Parts
Components requiring controlled dimensions and high surface hardness can be manufactured from EN31 Round Bar.
Manan Steel & Metals currently lists EN31 Round Bar for applications across mechanical and plant engineering and other industries, with a range of supplied forms and finishes.
EN31 Heat Treatment
Heat treatment is central to the performance of EN31.
Annealing
EN31 may be supplied in an annealed condition to provide a softer structure suitable for machining and subsequent heat treatment.
Hardening
The material can be heated to an appropriate austenitizing temperature and quenched to develop high hardness.
Tempering
Tempering after hardening is used to adjust the balance between hardness and toughness.
Stabilizing
For precision components, dimensional stabilization may be important after heat treatment.
Ovako notes that through-hardening bearing steels can be combined with stabilizing heat treatment where dimensional stability is required in tool applications.
The exact heat-treatment cycle must be selected according to the component size, required hardness and service conditions.
EN31 Machining
EN31 is normally easier to machine before full hardening.
Typical machining operations include:
- Turning
- Milling
- Drilling
- Boring
- Threading
- Grinding
For precision bearing and tooling applications, grinding can become an important final manufacturing process after heat treatment.
The supplier should be informed whether the material is required in an annealed condition for machining or already hardened for a particular application.
When machining hardened EN31, tooling and cutting parameters need to be selected for the actual hardness level.
EN31 Round Bar Sizes and Finishes
Industrial buyers may require EN31 Round Bar in different sizes and surface conditions.
Common requirements include:
Bright Round Bar
Suitable for machining applications requiring controlled dimensions and improved surface quality.
Cold Drawn Bar
Used where dimensional accuracy and surface finish are important.
Centreless Ground Bar
Suitable for precision applications.
Peeled or Turned Bar
Provides a controlled starting surface and diameter.
Hot Rolled / Black Bar
Suitable where additional machining allowance is acceptable.
Forged Round Bar
Relevant for certain larger-section requirements.
Manan Steel & Metals lists EN31 Round Bar with options including cold-drawn, centreless-ground, smooth-turned, peeled, hot-rolled, polished and other finishes. View Manan Steel & Metals EN31 Round Bar specifications.
EN31 Round Bar Specifications
A complete enquiry should include more than just the grade name.
| Requirement | Example |
|---|---|
| Grade | EN31 |
| Material Designation | 100Cr6 / applicable designation |
| Product | Round Bar |
| Diameter | ___ mm |
| Length | ___ mm |
| Condition | Annealed / Hardened & Tempered |
| Finish | Bright / Ground / Peeled / Turned |
| Tolerance | ___ |
| Quantity | ___ kg / pieces |
| Testing | MTC / Hardness / UT / Other |
For bearing applications, cleanliness and quality requirements can also be important.
For a critical component, state the customer’s exact material specification rather than assuming all 100Cr6-type materials are interchangeable.
What Affects EN31 Round Bar Price?
The EN31 Round Bar price depends on the complete specification.
Diameter
Larger diameters require more material and can involve different processing requirements.
Finish
Bright, peeled, turned, polished and centreless-ground bars involve different processing stages.
Heat Treatment
Annealed and hardened material can have different processing costs.
Tolerance
Precision-ground and tight-tolerance bars generally require additional processing.
Quantity
The price for a large production requirement can differ from a small quantity.
Testing
MTC, hardness testing, ultrasonic testing and dimensional inspection may influence the quotation.
Availability
The availability of a particular EN31 diameter and finish can influence lead time and commercial pricing.
For an accurate EN31 Round Bar price in Mumbai, provide the complete specification instead of requesting only a per-kilogram price.
How to Buy EN31 Round Bar
For an industrial enquiry, provide:
Material: EN31 / 100Cr6
Diameter: ___ mm
Length: ___ mm
Condition: ___
Heat Treatment: ___
Finish: ___
Tolerance: ___
Quantity: ___ kg / pieces
Testing: ___
Application: Bearing / Roller / Shaft / Gear / Tooling / Other
If the requirement is for bearing components, mention the component type and expected service conditions.
This gives the supplier useful information for understanding the material requirement.
EN31 Round Bar Supplier in Mumbai
For companies searching for an EN31 Round Bar Supplier Mumbai, Manan Steel & Metals supplies EN31 Round Bar for engineering and industrial requirements.
Manan’s published EN31 page lists 100Cr6-related specifications, multiple diameter ranges, surface finishes and supply conditions. View EN31 Round Bar from Manan Steel & Metals.
For a quotation, mention:
EN31 / 100Cr6
Diameter
Length
Condition
Finish
Tolerance
Quantity
Testing
Application
This helps ensure that the required grade and supply condition are clearly understood before quotation.
Frequently Asked Questions
What is EN31 Round Bar?
EN31 Round Bar is a high-carbon chromium alloy steel used for high-hardness, wear-resistant and bearing-related applications.
What is the equivalent of EN31?
EN31 is commonly associated with 100Cr6 and 1.3505. Similar designations also include SAE 52100, but exact equivalency should be confirmed against the required specification. Ovako lists 100Cr6, 1.3505 and SAE 52100 among similar designations.
Is EN31 a bearing steel?
EN31 is widely used for bearing-related applications, and 100Cr6 is classified as a through-hardening bearing steel by Ovako.
What is EN31 used for?
Applications include bearing components, rollers, shafts, bushes, gears, precision machine parts and selected tooling applications.
Can EN31 Round Bar be heat treated?
Yes. EN31 can be annealed, hardened and tempered, with stabilizing treatments used where dimensional stability is important.
Is EN31 suitable for high-wear applications?
Yes. Its high-carbon chromium chemistry allows high hardness after suitable heat treatment, making it useful for selected wear-resistant components.
What affects EN31 Round Bar price?
Diameter, length, finish, heat-treatment condition, tolerance, quantity, testing, availability and market conditions can affect the final quotation.
How can I get an EN31 Round Bar quotation in Mumbai?
Send the EN31 / 100Cr6 grade, diameter, length, condition, finish, quantity and testing requirements to Manan Steel & Metals.
Request a Quote for EN31 Round Bar
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
Website: www.manansteel.com
For a faster quotation, send:
Material: EN31 / 100Cr6
Diameter: ___ mm
Length: ___ mm
Condition: ___
Heat Treatment: ___
Finish: ___
Tolerance: ___
Quantity: ___ kg / pieces
Testing: ___
Application: ___
For bearing or precision applications, include the component type and required finished dimensions whenever possible.