This kind of roll is made of graphite in spherical shape, its nature is similar to alloy indefinite chill roll, its strength is higher than indefinite chill roll and it generally adopts static or dynamic casting.
Chemical Composition
Mark
C
Si
Mn
Cr
Ni
Mo
Mg
SG Ⅰ
3.00-3.60
1.00-2.50
0.40-1.00
0.20-0.60
＜0.30
0.20-0.60
≥0.04
SG Ⅱ
3.00-3.60
1.20-2.40
0.40-1.00
0.20-0.60
0.20-0.60
0.20-0.60
≥0.04
SG Ⅲ
3.00-3.60
1.20-2.40
0.40-1.00
0.20-0.60
0.50-1.00
0.20-0.60
≥0.04
SG Ⅳ
3.00-3.60
1.20-2.40
0.40-1.00
0.30-1.20
1.01-2.50
0.40-0.80
≥0.04
Performance and Application
Mark
Hardness（HS）
Tensile strength（Mpa）
Bending strength（Mpa）
Purpose
SG Ⅰ
40-55
≥300
500-700
Rough rolled rack for rod and wire materials and profile steel
SG Ⅱ
55-70
≥300
500-700
SG Ⅲ
60-70
≥300
600-800
medium and finishing rack for rod and wire materials and profile steel
