SUJ2 Steel Equivalent, Composition, Properties, Hardness

SUJ2 Bearing Steel

SUJ2 steel is a Japanese JIS standard high carbon chromium bearing steel grade. After heat treatment, it has high and uniform hardness, good dimensional stability and corrosion resistance, but the weldability is poor.

SUJ2 material is used to make various bearing rings and rolling elements, such as steel balls, tapered rollers, cylindrical rollers, spherical rollers, needle rollers, etc. It can also be used to manufacture molds, precision measuring tools, etc.

Data Sheet & Specification

SUJ2 Steel Steel Chemical Composition

The chemical composition of SUJ2 bearing steel are displayed in the following table.

		SUJ2 Steel Chemical Composition %
Standard	Steel Grade	C	Si	Mn	P ≤	S ≤	Cr	Ni ≤	Mo ≤	Cu ≤
JIS G4805	SUJ2	0.95-1.10	0.15-0.35	≤ 0.50	0.025	0.025	1.30-1.60	0.25	0.08	0.25

Note: The Cu content of the wire rod shall be 0.20% or less.

SUJ2 Steel Mechanical Properties

Spheroidizing annealed hardness

• SUJ2 Material Brinell hardness: ≤201 HBW
• Material Rockwell hardness: ≤94 HRB

SUJ2 Equivalent Grades

SUJ2 steel equivalent to ISO, US ASTM AISI SAE, European EN, Germany DIN, British BS, France NF, and Chinese GB standard. (For reference)

SUJ2 equivalent grades
Japanese		USA		European		China		ISO
Standard	Grade	Standard	Grade	Standard	Grade (Steel Number)	Standard	Grade	Standard	Grade
JIS G4805	SUJ2	AISI SAE, ASTM A295/A295M	52100	EN ISO 683-17	100Gr6 (1.3505)	GB/T 18254	GCr15 Steel	ISO 683-17	100Gr6 (1.3505)