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SUJ2 Bearing Steel | AISI 52100 | 100Cr6 Steel

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SUJ2 Suppliers - AISI 52100 Bearing Steel, EN31, 100Cr6, 1.3505

The common name for this type of Bearing Steel is SUJ2 , the JIS Standard Alloy Bearing Steel, Origin Japan Bearing Steel.

Bearing steel 52100 is one kind of special steel with features of high wear resistance and rolling fatigue strength.
AISI 52100 / SUJ2 Alloy Steel is known as a high carbon , chromium containing low alloy steel.

* Please refer to this blog for our export to Indonesia : https://www.ecarbonsteel.com/index.php?ws=latestnews&nid=92423

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

ASTM 52100 Bearing Steel is equivalent to

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

Chemical Composition of JIS SUJ2

Element	Content (%)
Iron, Fe	96.5 – 97.32
Chromium, Cr	1.30 – 1.60
Carbon, C	0.980 – 1.10
Manganese, Mn	0.250 – 0.450
Silicon, Si	0.150 – 0.300
Sulfur, S	≤ 0.0250
Phosphorous, P	≤ 0.0250

Mechanical Properties of 1.3505 Alloy 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

Forging of AISI 52100 Steel

EN31 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.

Heat Treatment of AISI 52100 , SUJ2 Steel

SUJ 2 alloy steel is heated at 816°C (1500°F) followed by quenching in oil. Before performing this process, it is subjected to normalizing heat treatment at 872°C (1600°F) followed by slowly cooling in order to reduce the machining stress.

Hardening of SUJ2 Steel

100Cr6 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.

Applications for SUJ2 , 52100 Steel

Alloy Steel 52100 Grade Bearing Steel is mainly used for the manufacture of aircraft bearings and other highly stressed parts. This steel grade SUJ2 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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