The carbon content of alloy cast steel rolls is lower than other cast rolls, included adamite rolls, HCr steel rolls and graphite steel rolls, so it exhibit excellent toughness. The alloy cast steel rolls are made by high quality melted steel with arc furnace and refiner with advanced casting and heat treatment procedure, the rolls also have good wear resistance, and fire crack resistance.
Chemical Composition
Symbol |
C |
Si |
Mn |
Cr |
Ni |
Mo |
V |
Nb |
AS40 |
0.35-0.45 |
0.20-0.60 |
0.60-1.20 |
2.00-3.50 |
0.00-0.80 |
0.30-0.70 |
0.05-0.15 |
- |
AS50 |
0.45-0.55 |
0.20-0.60 |
0.60-1.20 |
1.00-3.00 |
0.30-1.00 |
0.30-0.70 |
0.05-0.15 |
- |
AS60 |
0.55-0.65 |
0.20-0.45 |
0.90-1.20 |
0.80-1.20 |
- |
0.20-0.45 |
- |
- |
AS60Ⅰ |
0.55-0.65 |
0.20-0.60 |
0.50-1.00 |
0.80-1.20 |
0.20-1.50 |
0.20-0.60 |
- |
- |
AS65 |
0.60-0.70 |
0.20-0.60 |
0.70-1.20 |
0.80-1.20 |
- |
0.20-0.45 |
- |
0.06-0.10 |
AS65Ⅰ |
0.60-0.70 |
0.20-0.60 |
0.50-0.80 |
0.80-1.20 |
0.20-0.50 |
0.20-0.45 |
- |
- |
AS70 |
0.65-0.75 |
0.20-0.45 |
0.90-1.20 |
- |
- |
- |
- |
- |
AS70Ⅰ |
0.65-0.75 |
0.20-0.45 |
1.40-1.80 |
- |
- |
- |
- |
- |
AS70Ⅱ |
0.65-0.75 |
0.20-0.45 |
1.40-1.80 |
- |
- |
0.20-0.45 |
- |
- |
AS75 |
0.70-0.80 |
0.20-0.45 |
0.60-0.90 |
0.75-1.00 |
- |
0.20-0.45 |
- |
- |
AS75Ⅰ |
0.70-0.80 |
0.20-0.70 |
0.70-1.10 |
0.80-1.50 |
≥0.20 |
0.20-0.60 |
- |
- |
Physical Properties Hardness Curve
Symbol |
Barrel Hardness |
Roll Neck |
Tensile Strength |
Application |
AS40 |
45-65 HS |
≤45 HS |
≥800 MPa |
Hot strip mill Backup roll, roughing roll Hot plate mill roughing roll; cold rolling mill backup roll |
AS50 |
60-70 HS |
≤45 HS |
≥800 MPa |
|
AS60 |
35-50 HS |
≤45 HS |
≥650 MPa |
Section mill and bar mill roughing roll Universal mill Hot strip mill roughing roll, backup roll, vertical roll |
AS60Ⅰ |
35-45 HS |
≤45 HS |
≥750 MPa |
|
AS65 |
35-45 HS |
≤45 HS |
≥650 MP |
|
AS65Ⅰ |
35-45 HS |
≤45 HS |
≥750 MP |
|
AS70 |
32-42 HS |
≤45 HS |
≥650 MPa |
Medium section and light section mill roughing roll Bar mill and wire rod mill roughing roll |
AS70Ⅰ |
35-45 HS |
≤45 HS |
≥680 MPa |
|
AS70Ⅱ |
35-45 HS |
≤45 HS |
≥700 MPa |
|
AS75 |
35-50 HS |
≤45 HS |
≥700 MPa |
Bloom/Cogging mill roughing roll Universal mill Hot strip mill roughing mill |
AS75Ⅰ |
35-50 HS |
≤45 HS |
≥800 MPa |