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 |
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.
