THERMA™ is a Nodular (Spheroidal) Cast iron, alloyed with Cr-Ni-Mo and heat-treated to produce a fine Ferritic/Pearlitic structure characterised by Bulls-Eye type Graphite with a Ferrite rim. It provides a combination of high strength with excellent thermal characteristics to solve the problems of thermal failure and heavy fire-cracking in roughing and intermediate stands.
| GRADE | THERMA™ |
|---|---|
|
C: 3-3.5% Ni: 3-5% Cr + Mo: <3% |
Bloom and Billet Mills, Roughing Stands of all Long Product Mills and Seamless Mills |
| HSc | 40-55 |
| Tensile Strength MPa | 600-950 |
| Bending Strength MPa | 1050-1300 |
| Modulus of Elasticity GPa | 180-200 |
| Microstructure |  |
The hardness adjustment is obtained during a complex heat treatment process.
For production, we need a range of 5 ShC which needs to be specified in the roll order.
Our technical team can help to determine the most suitable grade, degree of hardness and manufacturing method to meet with individual mill conditions and specifications.