Home > Products > Mill Rolls > Cast Iron Rolls
Product Description
The shell material of pearlitic nodular cast iron rolls consists of nodular graphite and carbides in an acicular bainitic matrix. The acicular roll material is more highly alloy than the pearlitic roll material. Acicular nodular iron rolls are more wear resistant than pearlitic nodular iron rolls of the same hardness. But pearlitic nodular Iron rolls have superior resistance to thermal cracking.
It is widely used in the intermediate stands and finishing stands of bar mills and small section mills.
This type of roll is often made by centrifugal cast unless the roll has a very deep groove in the body. Its microstructure consists of bainite & pearlite, spheroidal graphite and primary carbide type M3C up to 40%. Although this roll is hard, with proper heat treatment we can improve its cutting properties and eliminate the hard spots.
When the groove in the roll body is very deep, we recommend using rolls static cast with groove to achieve a low hardness drop between the body surface and bottom of the groove.
Chemical Composition
|
|
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
Mg |
|
|
Ccentrifugal |
Static |
SGA I |
2.90-3.60 |
1.40-2.20 |
0.40-1.00 |
≤0.15 |
≤0.030 |
0.20-1.00 |
3.01-3.50 |
0.50-1.00 |
≥0.04 |
|
SGA II |
2.90-3.60 |
1.40-2.20 |
0.40-1.00 |
≤0.15 |
≤0.030 |
0.30-1.50 |
3.50-4.50 |
050-1.00 |
≥0.04 |
||
|
CORE |
2.90-3.70 |
1.40-2.60 |
0.50-1.00 |
≤0.15 |
≤0.030 |
≤0.08 |
≤0.15 |
≤0.50 |
≥0.04 |
||
Mechanical Properties
|
Tensile Strength (kg/mm²） |
≥350 |
|
Bending Strength (kg/mm²） |
970-1380 |
|
Elongation (%) |
0.2-0.5 |
Metallography Organism
Company Information
Our company provides an extensive range of top-quality consumables and equipments for steel mills, cement mills, mining and foundry industry which covers rolling mill rolls, tube sleeves, welding pipe roller, all kinds of castings and forgings, wear-resistant parts as well as rolling mill parts. Our products have been exported to 20 countries and regions including Southeast Asia, Europe, North America, South America and Middle East and enjoyed high reputation from home and aboard.
Work shop
We have a series of advanced machining equipment that meet the production needs, including centrifugal machine, intermediate frequency induction furnace, heat treatment furnace, CNC external grinding machine, CNC grinding machine, vertical gantry milling machine, turning lathe, and sawing machine.
Package & Shipping
Our Service
As customers required, we provide tailored design proposal for production line that is suitable for customers' financial, technical and production needs.
High performance rolling mill stands and auxiliary equipments/spare parts used in the rolling mill production line. (Such as roller box, gearbox reduction, coil laying head, vertical and side loops, flying shears, chopping shears and gripping shears, pinch roll machine and so on)
