Ventura Alloy And Steels Private Limited

100Cr6 Bearing Steel Round Bars – Material Description

100Cr6 is a high-carbon chromium alloy steel designed for bearings and high-wear applications. It is renowned for its high hardness, excellent wear resistance, high fatigue strength, and dimensional stability after heat treatment. This grade is widely used in ball and roller bearings, precision shafts, spindles, and heavy-duty machine components.

It is equivalent to EN31 / AISI 52100 / SAE 52100 / JIS SUJ2, a globally trusted grade in bearing and automotive industries.

Chemical Composition (Typical %) Mechanical Properties Available Sizes of Round Bars

• Hot Rolled / As Rolled: 16 mm – 200 mm dia

• Peeled / Turned / Ground: 12 mm – 120 mm dia (tight tolerances, bright surface)

• Forged Round Bars: 150 mm and above for custom shafts and heavy-duty parts

Heat Treatment

• Annealed Condition: Soft, machinable (~200 HB)

• Hardened & Tempered: Quench at 840–860°C (oil or polymer), temper at 150–200°C to 58–62 HRC

• Stress Relieving: After rough machining, before final hardening

Key Features

• High wear resistance and surface hardness

• Excellent toughness and fatigue strength

• Maintains dimensional stability after heat treatment

• Machinable in annealed condition

Applications

• Bearings: Ball, roller, needle bearings, bearing races

• Automotive: Gear pins, shafts, CV joints, engine components

• Tooling & Dies: Spindles, punches, wear-resistant parts

• Hydraulic & Machinery: Piston rods, guide pins, heavy-duty shafts

Equivalent Grades

• EN / IS: EN31 / 100Cr6

• AISI / SAE: 52100

• JIS: SUJ2

EN31 Round Bars – Material Description

EN31 is a high-carbon chromium alloy steel known for its high hardness, excellent wear resistance, and high fatigue strength. It retains dimensional stability after heat treatment and is widely used for high-precision, wear-resistant components such as bearings and shafts.

Equivalent to AISI 52100 / SAE 52100 / 100Cr6, EN31 is typically supplied in round bar form for machining into critical parts requiring superior surface hardness and durability.

Chemical Composition (Typical %) Available Sizes of Round Bars

Hot Rolled (Annealed) Round Bars

• Sizes: 16 mm to 200 mm dia

• Condition: Annealed (for machining and further hardening)

Peeled / Turned / Ground Round Bars

• Sizes: 12 mm to 120 mm dia

• Condition: Peeled, straightened, and tight tolerance

• Surface Finish: Bright (suitable for precision components)

Forged Round Bars

• Sizes: 150 mm and above

• Application: Custom sizes for shafts and heavy machinery parts

Mechanical Properties (After Heat Treatment) Heat Treatment Response

Annealed Condition:

• Soft for machining (approx. 200 HB)

Hardened & Tempered Condition:

• Quenching at 840–860°C in oil or polymer

• Tempering at 150–200°C to achieve 60–65 HRC

Stress Relieving:

• Done after rough machining and before final hardening

Typical Applications

Bearings:

• Ball & roller bearings, bearing races, needle bearings

Automotive:

• Gear pins, transmission shafts, CV joints, engine parts

Tooling & Dies:

• Punches, spindles, wear-resistant tools

Machinery & Hydraulics:

• Piston rods, guide pins, heavy-duty shafts

Product Condition & Supply Form Key Advantages

✅ Excellent hardness and wear resistance
✅ High fatigue and impact strength
✅ Good machinability in annealed condition
✅ Trusted, industry-standard grade for bearing and automotive applications

EN31 Round Bars – Material Description

EN31 is a high-carbon chromium alloy steel known for its high hardness, excellent wear resistance, and high fatigue strength. It retains dimensional stability after heat treatment and is widely used for high-precision, wear-resistant components such as bearings and shafts.

Equivalent to AISI 52100 / SAE 52100 / 100Cr6, EN31 is typically supplied in round bar form for machining into critical parts requiring superior surface hardness and durability.

Chemical Composition (Typical %) Available Sizes of Round Bars

Hot Rolled (Annealed) Round Bars

• Sizes: 16 mm to 200 mm dia

• Condition: Annealed (for machining and further hardening)

Peeled / Turned / Ground Round Bars

• Sizes: 12 mm to 120 mm dia

• Condition: Peeled, straightened, and tight tolerance

• Surface Finish: Bright (suitable for precision components)

Forged Round Bars

• Sizes: 150 mm and above

• Application: Custom sizes for shafts and heavy machinery parts

Mechanical Properties (After Heat Treatment) Heat Treatment Response

Annealed Condition:

• Soft for machining (approx. 200 HB)

Hardened & Tempered Condition:

• Quenching at 840–860°C in oil or polymer

• Tempering at 150–200°C to achieve 60–65 HRC

Stress Relieving:

• Done after rough machining and before final hardening

Typical Applications

Bearings:

• Ball & roller bearings, bearing races, needle bearings

Automotive:

• Gear pins, transmission shafts, CV joints, engine parts

Tooling & Dies:

• Punches, spindles, wear-resistant tools

Machinery & Hydraulics:

• Piston rods, guide pins, heavy-duty shafts

Product Condition & Supply Form Key Advantages

✅ Excellent hardness and wear resistance
✅ High fatigue and impact strength
✅ Good machinability in annealed condition
✅ Trusted, industry-standard grade for bearing and automotive applications

SAE 52100 Round Bars 🔹 Material Description

SAE 52100 is a high-carbon chromium alloy steel known for:

• High hardness

• Excellent wear resistance

• High fatigue strength

• Dimensional stability after heat treatment

It is the same grade as EN31 / 100Cr6 / AISI 52100, typically used in round bar form for machining into high-precision parts.

🔹 Chemical Composition (Typical %) 🔹 Available Sizes of Round Bars

SAE 52100 round bars are commonly available in the following forms:

• Hot Rolled (Annealed) Round Bars:
  Sizes: 16 mm to 200 mm (Dia)
  Condition: Annealed (suitable for machining and further hardening)

• Peeled / Turned / Ground Round Bars:
  Sizes: 12 mm to 120 mm
  Condition: Peeled and straightened, tight tolerances
  Surface Finish: Bright, suitable for precision components

• Forged Round Bars:
  Sizes: 150 mm and above
  Application: Custom sizes for shafts, heavy machinery parts

🔹 Mechanical Properties (After Heat Treatment) 🔹 Heat Treatment Response

• Annealed Condition:
  Soft for machining (hardness around 200 HB)

• Hardened & Tempered Condition:
  Quenching in oil or polymer after heating to ~840–860°C
  Tempering at 150–200°C achieves ~60–65 HRC

• Stress Relieving:
  After rough machining, components are stress-relieved before final heat treatment

🔹 Typical Applications

SAE 52100 round bars are used in:

✅ Bearings:

• Ball and roller bearings

• Bearing races

• Needle bearings

✅ Automotive:

• Gear pins and transmission shafts

• CV joints and engine components

✅ Tooling & Dies:

• Precision spindles

• Punches and wear-resistant parts

✅ Hydraulics & Machinery:

• Piston rods

• Guide pins

• Shafts for heavy-duty applications

🔹 Product Condition & Supply Form 🔹 Why Choose SAE 52100 Round Bars?

✅ Excellent strength-to-wear-resistance ratio
✅ Good machinability in annealed condition
✅ Long component life in fatigue and frictional loading
✅ Well-known and trusted worldwide in bearing industries

EN31 / AISI 52100 / 100Cr6 – High Carbon Chromium Steel

Overview:
EN31 (AISI 52100 / 100Cr6) is a high carbon chromium alloy steel with excellent wear resistance, high hardness, and toughness, typically used for rolling bearings, high-performance bearings, and mechanical components that require high fatigue strength and resistance to wear.

Chemical Composition (%): Mechanical Properties (Typical): Heat Treatment Options:

• Annealing: Heating to 850–900°C, followed by slow cooling to refine grain structure.

• Hardening: Heating to 830–860°C, followed by quenching in oil or air, achieving hardness levels of 58–65 HRC.

• Tempering: Post-quenching tempering at 150–200°C to achieve the required hardness and reduce brittleness.

Applications:

• Rolling Bearings (ball bearings, roller bearings)

• High-Speed Bearings for automotive and industrial use

• Axles and Spindles for machinery

• Gears, Pins, and Rollers in high-stress environments

• Tools that require high wear resistance

• Precision shafts and spindles in heavy machinery

Equivalent Grades: Product Forms:

• Round Bars (for shafts, bearings)

• Plates (for tooling applications)

• Forged Bars (for larger components)

• Rods & Wire (for manufacturing precision components)

Conclusion:

EN31 / AISI 52100 / 100Cr6 is a premium alloy steel designed for bearing applications, high wear resistance, and fatigue strength. It is ideal for use in industries where components undergo high-stress conditions and need to maintain high performance for extended periods.

EN31 Round Bars – Material Description

EN31 is a high-carbon chromium alloy steel known for its high hardness, excellent wear resistance, and high fatigue strength. It retains dimensional stability after heat treatment and is widely used for high-precision, wear-resistant components such as bearings and shafts.

Equivalent to AISI 52100 / SAE 52100 / 100Cr6, EN31 is typically supplied in round bar form for machining into critical parts requiring superior surface hardness and durability.

Chemical Composition (Typical %) Available Sizes of Round Bars

Hot Rolled (Annealed) Round Bars

• Sizes: 16 mm to 200 mm dia

• Condition: Annealed (for machining and further hardening)

Peeled / Turned / Ground Round Bars

• Sizes: 12 mm to 120 mm dia

• Condition: Peeled, straightened, and tight tolerance

• Surface Finish: Bright (suitable for precision components)

Forged Round Bars

• Sizes: 150 mm and above

• Application: Custom sizes for shafts and heavy machinery parts

Mechanical Properties (After Heat Treatment) Heat Treatment Response

Annealed Condition:

• Soft for machining (approx. 200 HB)

Hardened & Tempered Condition:

• Quenching at 840–860°C in oil or polymer

• Tempering at 150–200°C to achieve 60–65 HRC

Stress Relieving:

• Done after rough machining and before final hardening

Typical Applications

Bearings:

• Ball & roller bearings, bearing races, needle bearings

Automotive:

• Gear pins, transmission shafts, CV joints, engine parts

Tooling & Dies:

• Punches, spindles, wear-resistant tools

Machinery & Hydraulics:

• Piston rods, guide pins, heavy-duty shafts

Product Condition & Supply Form Key Advantages

✅ Excellent hardness and wear resistance
✅ High fatigue and impact strength
✅ Good machinability in annealed condition
✅ Trusted, industry-standard grade for bearing and automotive applications