SAE 52100

Grade Introduction:
SAE 52100 bearing steel is a high-quality Alloy Bearing steel, It belongs to high carbon, chromium-containing low alloy steel. SAE 52100 Oil Quenched & Tempered Hardness is 28-34 HRC. SAE 52100 steel Annealing delivery hardness less than 250HB.
SAE 52100 Alloy bearing steel properties is a chromium, manganese alloy steel specification. SAE 52100 is equivalent to DIN 100Cr6, GB GCr15 steel. Most applications can replace each other.

Grade Application

SAE 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 a 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.

Equivalent Grades

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

Addition to other grades

MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, DIN1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTMSA-105, SAE1018, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.

Our Supply Range

We supply to automotive ancillaries and OEM customers. The products we manufacture are used as input for manufacturing of automotive and general engineering components. These components are further assembled into systems fitted in automobiles and other engineering applications.

Product Type Size Range
Forged Round Bars 140mm Dia to 850mm
Rolled Round Bars 16mm Dia and above
Forged Flat Bars Thickness: 32mm to 510mm, Width: 65mm to 1050mm
Rolled Flat Bars Thickness: 6mm to 110mm, Width: 25mm to 510mm

Chemical Composition

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
–
–

Heat Treatment

SAE 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.

Hardness

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

Hardening

SAE 52100 alloy steel is hardened by cold working, or heating and quenching. It can be carburized at 913°C (1675°F) followed by quenching. It is again heated at 788°C (1450°F) followed by quenching for the second time.

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

Forging Properties

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.

Stress Relieving

Heat it up to 600-700℃, stay the temperature, furnace cooling. The need for the hardness of mold steel is 187-229HBS. The characters remove the work hardening and residual stress.

Mechanical Properties

Quantity
Value
Unit
Young’s modulus
200000 – 20000
MPa
Tensile strength
650 – 880
MPa
Elongation
8 – 25
%
Fatigue
275 – 275
MPa
Yield strength
350 – 350
MPa

Physical Properties

Properties
Metric
Imperial
Density
7.81 g/cm3
0.282 lb/in³
Melting point
1424°C
2595°F

Tempering

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

Normalizing

Heat it until the temperature at the range of 930-950℃, maintain the temperature, air cooling. The hardness needs to be 302-388HBS.

Annealing

AISI 52100 alloy steel is annealed at 872°C (1600°F) followed by slowly cooling to reduce cold working or machining stress

Density

Properties
Metric
Imperial
Density
7.81 g/cm3
0.282 lb/in³

Welding

This is a high carbon alloy typically used in bearing applications where welding is not applicable or appropriate.

Machinability

This is a high carbon alloy typically used in bearing applications where welding is not applicable or appropriate.

Supply Cities

Ambattur, Bangalore, Chennai, Coimbatore, Dindigul, Guindy, Madurai, Nellore, Hyderabad, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Kanyakumari, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Karur, Nagercoil, Kanchipuram, Karaikudi, Pudukottai, Nagapattinam.

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