Material of ETC EVO bearings

The material of the rolling elements and bearing components require enough hardness and large fatigue strength against repeated force that is due to fatigue fracture of rolling surface which control life of bearings.
To purpose prevent deformation of components due to high load we control limit of elasticity and strength of bearings.
ETC EVO bearings material is GCR15 Steel (JIS G4805) High carbon chromium bearing steel with following chemical composition:

 

No.

 

Standard

 

Symbol

Chemical Composition (%)

C

Si

Mn

P

S

Cr

 

1

GB

GCR15

 

0.98-1.10

 

0.15-0.35

 

<0.50

 

<0.025

 

<0.025

 

1.30-1.60

DIN

100Cr6

ASTM

E5200

JIS

SUJ2

 

2

GB

9Cr18

 

0.98-1.10

 

<1.00

 

<1.00

 

<0.025

 

<0.025

 

16.00-18.00

DIN

X105CrMO17

ASTM

440C

JIS

SUC440C