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Pearlitic rolls are composed by nodular graphite and carbides arranged in a pearlitic matrix. It's properties are similar to Indefinite Chill except that the graphite structure is changed from flake to spheroidal forms.  Pearlitic rolls will have higher strength than Indefinite Chill. Pearlitic roll can be produced by static casting (Monoblock) or by using the centrifugal cast (CC) Double-pour method.

Chemical Composition

Symbol

C

Si

Mn

Cr

Ni

Mo

Mg

SGPⅠ

2.90-3.60

1.40-2.20

0.40-1.00

0.10-0.60

1.50-2.00

0.20-0.80

≥0.04

SGPⅡ

2.90-3.60

1.20-2.00

0.40-1.00

0.20-1.00

2.01-2.50

0.20-0.80

≥0.04

SGPⅢ

2.90-3.60

1.00-2.00

0.40-1.00

 0.20-1.20

2.51-3.00

0.20-0.80

≥0.04

 

Physical Properties                                   

Symbol

Barrel Hardness

Roll Neck
Hardness

Tensile

Strength △

SGPⅠ

45-55 HS

35-55 HS

≥350/450 MPa

SGPⅡ

55-65 HS

35-55 HS

≥350/450 MPa

SGPⅢ

62-72 HS

35-55 HS

≥350/450 MPa

 

Properties

Recommended Applications

-Rolls for roughing stands of medium section mills, bar mills and wire mills.

-Roll for intermediate, finishing stands of bar mills.

-Roll for sleeves of universal stands.