Material Code

Chemical Composition(%)

C

Si

Mn

P

S

Cr

Ni

Mo

CC3

2.90~3.60

0.25~0.80

0.20~1.00

≤0.40

≤0.08

0.50~1.50

2.01~3.00

0.20~0.60

Designation of rolls

Barrel hardness (HSD)

Neck hardness (HSD)

Tensile strength (MFP)

backup roll

70~85

32~45

≥350