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Acicular Nodular Cast Iron Roll, alloyed with the nickel, manganese and chromium with a bainitic-acicular-martensitic matrix has a higher UTS, hardness and wear resistance is more than the SGP quality. Semi-continuous carbides maintain the wear resistance, while at the same time exhibiting high strength and resistance to fire-cracks.

The extensive heat treatment procedure ensures an acicular matrix. Acicular roll can be produced by static casting (Monoblock) or by using the centrifugal cast (CC) Double-pour method. SGP is the regular choice for the roughing group stands for bar and rebar mill. 

 

Chemical Composition

Symbol

C

Si

Mn

Cr

Ni

Mo

Mg

SGAⅠ

2.90-3.60

1.20-2.20

0.20-0.80

0.20-1.00

3.01-3.50

0.50-1.00

≥0.04

SGAⅡ

2.90-3.60

1.00-2.00

0.20-0.80

0.30-1.50

3.51-4.50

0.50-1.00

≥0.04

 

Physical Properties                       

Symbol

Barrel Hardness

Roll Neck
Hardness

Tensile

Strength △

SGAⅠ

55-78 HS

35-45 HS

≥350/450 MPa

SGAⅡ

60-80 HS

35-45 HS

≥350/450 MPa

                                                    

Recommended Applications

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

-Roll for forming, sizing, reducing and straightening stands for pipe and tube mills.

-Roll for sleeves of universal stands.