AISI 52100 Bearing Steel

aisi 52100 ROUND BAR

OTAI SPECIAL STEEL is 52100 bearing steel stockholders and suppliers from china. more 16 years experience in AISI 52100 steel plate, round bar, flat bar, square bar, pipe/tube supply.

AISI 52100 bearing steel is a?high?quality Alloy Bearing steel, It?belong to a high carbon, chromium containing low alloy steel.. 52100 Oil Quenched & Tempered Hardenss is 28-34 HRC. AISI 52100 steel Annealing delivery hardenss less than 250HB.

AISI 52100 Alloy bearing steel?properties is a chromium,manganese alloy steel specification. 52100 is equivalent to DIN 100Cr6, GB GCr15 steel. Most applications can replace each others.

Related Specifications?ASTM A29/A29M DIN EN 10083/3 JIS G4053 GB GB/T 3077

52100 Data pdf files down

Form of Supply

AISI 52100 bearing steel, supply the round bar, steel flat bar, plate, hexagonal bar and steel square block. AISI 52100?steel Round bar?can be sawn to your required lengths as one offs or multiple cut pieces. 52100 bearing steel Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.

Chemical composition

C(%) 0.95~1.10 Si(%) 0.15~0.35 Mn(%) 0.25~0.45 P(%) ≤0.015
S(%) ≤0.015 ?Cr(%) 1.35~1.60

Equivalent Of SAE E52100 Bearing?alloy tool steel

USA Germany China Japan France England Italy ISO Czechia Austria Sweden Spain
E52100/ ?G52986 100Cr6 (W3) / ?1.3505 GCr15 SUJ2 100C6 535A99 ?100Cr6(B1) ?SKF3

Heat treatment Related

  • ① Forging of 52100 Alloy bearing steel

AISI 52100 is forged at 927 to 1205°C (1700 to 2200°F), then annealing.

  • ② Annealing of 52100 Alloy bearing steel

Slowly heated to 872°C (1600°F), follow by slowly cooling to reduce cold working or machining stress. Different annealing ways will get different hardness.The 52100 bearing steel will get Hardness MAX 248 HB (Brinell hardness).

  • ③ Quenching and temperature of 52100 Alloy bearing steel

Heated to 816°C (1500°F) slowly, Then quenching in oil get 62 to 66 HRc hardness. High temperature tempering: 650-700℃,cool in air, get hardness 22 to 30HRC. Low temperature tempering: 150-170 ℃, Cool? in ari, get 61-66HRC hardness.

  • ④Hot work and cold work of 52100 Alloy bearing steel

AISI 52100 steel can hot worked at 205 to 538°C (400 to 1000°F), 52100 Bearing steel can be cold worked using conventional techniques in the annealed or normalized conditions.

Mechanical Properties

The mechanical properties of annealed AISI 52100 bearing steel (typical for steel) are outlined in the table below:

Tensile Yield Bulk modulus Shear modulus Poisson’s ratio Thermal conductivity
MPa Mpa Gpa Gpa ?W/mK
520 415 Min 140 80 0.27-0.30 46.6


AISI 52100 steel is widely used for a variety of applications in the used to the bearings in rotating machinery. Typical applications such as valve bodies, pumps and fittings, the high load of wheel, bolts, double-headed bolts, gears, internal combustion engine. Electric locomotives, machine tools, tractors, steel rolling equipment, boring machine, railway vehicle, and mining machinery transmission shaft on the steel ball, roller and shaft sleeve, etc.

Regular size and Tolerance of E52100 bearing steel

Steel round bar: Diameter ? 5mm – 3000mm

Steel plate: Thickness 5mm – 3000mm x Width 100mm – 3500mm

Steel Flat?bar: 5mm – 105mm

1) Hot Rolled round bar
Diameter Tolerance
Diameter Tolerance
≤12.70 -0.13 ~0.30 >50.80~63.5 -0.25~0.76
12.7~25.40 -0.13~0.41 >63.50~76.20 -0.25~1.02
>25.4~38.10 -0.15~0.51 >76.20~101.60 -0.30~+1.27
>38.1~50.80 -0.20~0.64 >101.60~203.20 -0.38~3.81
2) Hot Rolled steel plate
Thickness Tolerance
Thickness Tolerance
≤25.4 -0.41~0.79 >127~152 -1.60~2.39
>25.4~76 -0.79~1.19 >178~254 -1.98~3.18
>76~127 -1.19~1.60 >254~305 -2.39~3.96

Others 52100 have not specified size, pls contact our?experienced sales team.


AISI 52100 bearing steel round bar and flat sections can be cut to your required sizes. 52100 bearing steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. AISI 52100 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

Contact our experienced sales team to help you with your 52100 bearing steel questionsadn enquiry?by?Email or Telphone.?The questions will be reply in 24 hours.

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