Ventura Alloy And Steels Private Limited

20MnCr5 / 16MnCr5 – Case Hardening Alloy Steel

Overview:
20MnCr5 and 16MnCr5 are low-alloy case hardening steels known for their excellent wear resistance, high tensile strength, and good machinability. These steels are widely used for producing components that demand a hard, wear-resistant surface and a tough, impact-resistant core.

Key Properties:

• Composition: Low carbon with manganese and chromium additions

• Hardening Capability: Excellent surface hardening through carburizing

• Core Toughness: Maintains good ductility and toughness in the core after heat treatment

• Weldability: Moderate — welding is possible with proper precautions and post-weld treatment

• Machinability: Good – easily shaped and finished before hardening

Common Applications:

• Gears

• Shafts

• Camshafts

• Pins and bolts

• Transmission components

Heat Treatment Options:

• Carburizing: For surface hardening

• Quenching and Tempering: For strength and toughness

• Annealing: To soften before machining

• Normalizing: To refine grain structure and improve uniformity

Conclusion:
20MnCr5 / 16MnCr5 are ideal steels for applications requiring a combination of hard surface wear resistance and core toughness, making them popular in the automotive and mechanical engineering industries.

OHNS is an oil-hardening, non-deforming tool steel which can be hardened at relatively low temperatures. Tools and dies made from O1 will have good wearing qualities since the tungsten and higher chromium content gives improved wear resistance over the straight manganese grades.

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