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Carburizing Bearing Steel

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Overview

Designed to endure extreme conditions and heavy-duty applications, our carburizing bearing steel, including our high-temperature variants, offers superior wear resistance and extended fatigue life, making it the perfect choice for advanced manufacturing needs.

Carburizing bearing steel is a specially heat-treated material where the surface has a higher carbon content than the core. This process creates a hard, wear-resistant carburizing layer on the surface while maintaining toughness and strength in the core. This material is ideal for manufacturing bearings that must withstand cyclic high stress. Whether in ultra-high temperatures, low temperatures, or environments with strong vacuum, high impact, severe wear, and ultra-high speed, carburizing bearing steel is engineered to meet demanding operational requirements.

High-Temperature Carburizing Bearing Steel: For applications involving extreme heat, our high-temperature carburizing bearing steel maintains excellent mechanical properties and corrosion resistance even at temperatures as high as 300°C. This makes it indispensable for applications such as automotive turbochargers, aerospace engines, and industrial furnaces.

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Characteristics

  • High Surface Hardness:Provides exceptional wear resistance, ensuring longevity in challenging environments.
  • Deep Carburization:Enhances subsurface material properties, increasing overall strength and durability.
  • Excellent Core Toughness:Prevents fracture and fatigue failures, critical for high-stress applications.
  • Precise Metallurgical Control:Ensures material consistency and reliability across all applications.

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Production Process

Our carburizing bearing steel undergoes a meticulously controlled high-temperature carburization process. The steel is heated above its critical temperature in a protective atmosphere, allowing carbon atoms to diffuse uniformly into the surface layer. Following precise quenching and tempering, the steel’s microstructure is optimized for a perfect balance of hardness and toughness.

Operating Temperature Range
The rings and rolling elements made from our carburizing bearing steel typically exhibit hardness of HRc60-64, making them suitable for operation in temperatures ranging from -40°C to 140°C with proper lubrication. They can also withstand significant impact and vibration, ideal for use in locomotive and steel mill bearings.

Applications

  • Aerospace Components:Engine bearings and gears that require high performance in extreme conditions.
  • High-Speed Rail Bearings:Provides stable performance under high-speed operations.
  • Automotive Drivetrains:Including gearbox and hub bearings that demand durability and strength.
  • Industrial Machinery:Bearings for large motors and pumps, ensuring reliability and longevity in heavy-duty operations.
  • High-Temperature Applications:Such as turbochargers and engines in the automotive and aerospace sectors, where heat resistance is critical.

Common Sizes

  • Round Steel Bar:

Diameter: 20-120mm

Length: 4000-9000mm

The above specifications are common sizes; we can provide custom services according to customer requirements.

Chemical Composition

Carburizing Bearing Steel
NO. Grade Chemical Composition (Mass Fraction) /%
C Si Mn Cr Ni Mo Cu
1 G20CrMo 0.17~0.23 0.20~0.35 0.65~0.95 0.35~0.65 ≤0.30 0.08~0.15 ≤0.25
2 G20CrNiMo 0.17~0.23 0.15~0.40 0.60~0.90 0.35~0.65 0.40~0.70 0.15~0.30 ≤0.25
3 G20CrNi2Mo 0.19~0.23 0.25~0.40 0.55~0.70 0.45~0.65 1.60~2.00 0.20~0.30 ≤0.25
4 G20Cr2Ni4 0.17~0.23 0.15~0.40 0.30~0.60 1.25~1.75 3.25~3.75 ≤0.08 ≤0.25
5 G10CrNi3Mo 0.08~0.13 0.15~0.40 0.40~0.70 1.00~1.40 3.00~3.50 0.08~0.15 ≤0.25
6 G20Cr2Mn2Mo 0.17~0.23 0.15~0.40 1.30~1.60 1.70~2.00 ≤0.30 0.20~0.30 ≤0.25
7 G23Cr2Ni2Si1Mo 0.20~0.25 1.20~1.50 0.20~0.40 1.35~1.75 2.20~2.60 0.25~0.35 ≤0.25

 

High-Temperature Carburizing Bearing Steel
NO. Grade Chemical Composition (Mass Fraction) /%
C Si Mn Cr Ni Mo V W P S Cu Co
1 G13Cr4Mo4Ni4V 0.11~
0.15		 0.10~
0.25		 0.15~
0.35		 4.00~
4.25		 3.20~
3.60		 4.00~
4.50		 1.13~
1.33		 ≤
0.15		 ≤
0.015		 ≤
0.010		 ≤
0.010		 ≤0.25
2 G20W10Cr3NiV 0.17~
0.22		 ≤
0.35		 0.20~
0.40		 2.75~
3.25		 0.50~
0.90		 ≤
0.15		 0.35~
0.50		 9.50~
10.50		 ≤
0.015		 ≤
0.010		 ≤
0.10		 ≤0.25

Comparison Table of Steel Grades by Country

Carburizing Bearing Steel
NO. GB ISO ASTM DIN JIS
1 G20CrMo 20CrMo4 4118 20CrMo4 SCM420
2 G20CrNiMo 20CrNiMo 8620 18CrNiMo7-6 SNCM220
3 G20CrNi2Mo 20CrNi2Mo 9310 17CrNiMo6 SNC815
4 G20Cr2Ni4 20CrNi4 4820 20NiCrMo2-2 SNCM220H
5 G10CrNi3Mo 10CrNi3Mo 4340 14NiCrMo13-4 SNCM439
6 G20Cr2Mn2Mo 20CrMnMo2-5 – 20MnCrMo2-5 SCM822H
7 G23Cr2Ni2Si1Mo – – – –

 

High-Temperature Carburizing Bearing Steel
NO. GB ISO AISI DIN JIS
1 G13Cr4Mo4Ni4V – 440B X12CrNiMo12-6-4 SUS440B
2 G20W10Cr3NiV X12WMoCrV9-4 – X12WMoCrV10-3 SKD61

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