ASTM 52100 Bearing Steel | 1.3505 | 100Cr6 | SUJ2 | EN31

ASTM 52100 Bearing Steel | 1.3505 | 100Cr6 | SUJ2 | EN31

Short Description:

ASTM A295 is specification which covers 52100 high carbon bearing quality steelto be used in the manufacture of anti-friction bearings. And 52100 bearing steel is the most common steel grade in ASTM A295 standard for high-carbon anti-friction bearing steel. What is 52100 bearing steel? AISI/ASTM 52100 bearing steel is a high carbon, chromium containing low alloysteel that is through hardening and noted in particular for use asbearings. 52100 bearing steel is one kind of special steel with ...


  • Length: 3-5.8mm or Customization
  • Surface: black, peeled, or rough turned
  • Heat treatment: air-cooling, normalized, annealed, Q&T
  • Smelting process: EAF+LF+VD
  • Product Detail

    Product Tags

    ASTM A295

    is specification which covers 52100 high carbon bearing quality steel
    to be used in the manufacture of anti-friction bearings. And 52100 bearing steel is the most common steel grade in ASTM A295 standard for high-carbon anti-friction bearing steel.

    What is 52100 bearing steel?

    AISI/ASTM

    52100 bearing steel is a high carbon, chromium containing low alloy
    steel that is through hardening and noted in particular for use as
    bearings.


    52100 bearing steel is one kind of special steel with features of
    high wear resistance and rolling fatigue strength. High-carbon chromium
    bearing steel, engineering steel and some types of stainless steel and
    heat resistant steel are used as materials of bearings and for other
    purposes.

    Advantages of Chrome Bearing Steel 52100:

    • Superior hardness, 60-67 on Rockwell hardness scale (Rc) at room temperature

    • High carbon chrome alloy steel

    • Operates continually at temperatures up to 120°C

    • Used to produce precision ball bearings and roller bearings

    • Cost-effective

    • Long working life

    1. Relevant Steel Specification of ASTM 52100 Bearing Steel

    Country USA German Japan British
    Standard ASTM A295 DIN 17230 JIS G4805 BS 970
    Grades 52100 100Cr6/1.3505 SUJ2 535A99/EN31

    2. Chemical Composition of 52100 Bearing Steel and Equivalents

    Standard Grade C Mn P S Si Ni Cr Cu Mo
    ASTM A295 52100 0.93-1.05 0.25-0.45 0.025 0.015 0.15-0.35 0.25 1.35-1.60 0.30 0.10
    DIN 17230 100Cr6/1.3505 0.90-1.05 0.25-0.45 0.030 0.025 0.15-0.35 0.30 1.35-1.65 0.30
    JIS G4805 SUJ2 0.95-1.10 0.50 0.025 0.025 0.15-0.35 1.30-1.60
    BS 970 535A99/EN31 0.95-1.10 0.40-0.70 0.10-0.35 1.20-1.60

    3. Mechanical Properties of ASTM A295 52100 Bearing Steel

    Properties Metric Imperial
    Bulk modulus (typical for steel) 140 GPa 20300 ksi
    Shear modulus (typical for steel) 80 GPa 11600 ksi
    Elastic modulus 190-210 GPa 27557-30458 ksi
    Poisson’s ratio 0.27-0.30 0.27-0.30
    Hardness, Brinell
    Hardness, Knoop (converted from Rockwell C hardness) 875 875
    Hardness, Rockwell C (quenched in oil from 150°C tempered) 62 62
    Hardness, Rockwell C (quenched in water from 150°C tempered) 64 64
    Hardness, Rockwell C (quenched in oil) 64 64
    Hardness, Rockwell C (quenched in water) 66 66
    Hardness, Vickers (converted from Rockwell C hardness) 848 848
    Machinability (spheroidized annealed and cold drawn. Based on 100 machinability for AISI 1212 steel) 40 40
    • 52100 Steel Physical Properties

    Properties Metric Imperial
    Density 7.81 g/cm3 0.282 lb/in³
    Melting point 1424°C 2595°F
    • 52100 Alloy Steel Thermal Properties

    Properties Metric Imperial
    Thermal expansion co-efficient (@ 23-280°C/73.4- 36°F, annealed) 11.9 µm/m°C 6.61 µin/in°F
    Thermal conductivity (typical steel) 46.6 W/mK 323 BTU in/hr.ft².°F

    4. Forging of A295 52100 Bearing Steel

    AISI

    52100 alloy steel is forged at 927 to 1205°C, and should not be forged
    below 925ºC. A post-forge equalization treatment is recommended at 745ºC

    for 4-6 hours followed by air cooling for SAE/AISI 52100 steel.

    6. Heat Treatment for ASTM 52100 Bearing Steel

    ASTM/AISI

    52100 alloy bearing steel is heated at 816°C followed by quenching in
    oil. Before performing this process, it is subjected to normalizing heat

    treatment at 872°C followed by slowly cooling in order to reduce the
    machining stress.

    Hot Working

    AISI 52100 bearing steels alloy can be hot worked at 205 to 538°C.

    Cold Working

    AISI 52100 bearing steel can be cold worked using conventional techniques in the annealed or normalized conditions.

    Annealing

    For spheroidize anneale, the following isothermal anneal is recommended:

    • 1500ºF (815ºC) for 3 hours

    • 1350ºF (735ºC) for 4 hours

    • 1250ºF (675ºC) for 3 hours

    • Slow cool to 1000ºF (540ºC) then air cool.

    Quenching

    AISI 52100 alloy bearing steel could be hardened by quenching in water from 801-829 degree or quench in oil from 816-842 degree.

    Tempering

    Temper to desired hardness as indicated by tempering curves after water or oil quench.

    5. Applications of 52100 Bearing Steel

    Alloy

    steel 52100 grade bearing steel is mainly used for the manufacture of
    aircraft bearings and other highly stressed parts. This steel grade
    52100 steel is preferably vacuum arc re-melted to give optimum
    performance.

    Typical applications: Bearing Manufacture, CV joints, ball screws, gauges, knife etc.


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