SpecificationsBearing steel round bars 
GCr15, GCr15SiMn, SAE52100, SUJ2, 100Cr6 

Bearing steel has enormous hardness. With bending strength, bearing steel can withstand  high stress and centrifugal forces. Bearing steel materials can eighter be through-hardened or case-hardened. To ensure purity, vacuum-processing is necessary. Bearing steel is magnetic in nature and is a good thermal and electrical conductor.

	GCr15	GCr15SiMn
JIS	SUJ2	SUJ3
DIN	100Cr6	100CrMnSi6-4
ASTM/SAE/AISI	52100	100CrMnSi6-4
C	0.95-1.05	0.95-1.05
Si	0.15-0.35	0.45-0.75
Mn	0.25-0.45	0.95-1.25
P/S	0.025	0.025
Cr	1.40-1.65	1.40-1.65
Ni	0.30(max)	0.30(max)
Mo	0.10(max)	0.10(max)
Cu	0.25(max)	0.25(max)

1. Processing: EAF + LF + VD

2. Deliver condition: Hot rolled or cold drawn

3. Heat treatment: Normalizing, Annealing, Quenching and Tempering

4. Surface Treatment: Polishing, Peeling and Turning