Cork has the following advantages, like good erosion resistance, Stable flow control during casting, tight closure after casting, etc..
Physico-chemical parameters of the locking rod
| Subject | Index | |
| SB45 | SB40 | |
| Al2O3 % | ≥45 | ≥40 |
| C % | ≥20 | ≥25 |
| Flexural strength, MPa | ≥5.5 | ≥5.5 |
| Apparent porosity % | ≤19 | ≤19 |
| Bulk density, g/cm3 | ≥2.36 | ≥2.2 |
Head part:
| Subject | Index | ||||||
| MC65 | MC60 | AC70 | AC65 | AC60 | MA70 | MA65 | |
| Al2O3 % | / | / | ≥70 | ≥65 | ≥60 | / | / |
| MgO % | ≥65 | ≥60 | // | / | / | / | / |
| Al2O3+MgO % | / | / | / | // | ≥70 | ≥65 | |
| C % | ≥9 | ≥12 | ≥9 | ≥12 | ≥15 | ≥8 | ≥10 |
| Bulk density, g/cm3 | ≥2.45 | ≥2.4 | ≥2.65 | ≥2.6 | ≥2.55 | ≥2.6 | ≥2.45 |
| Apparent porosity % | ≤19 | ≤19 | ≤19 | ≤19 | ≤19 | ≤19 | ≤19 |
Introduction to Rongsheng company

Rongsheng is a professional fireproof material supplier with 10 years of export experience to more than 80 countries. Rongsheng's main products are various fire bricks, shapeless fireproof materials, metallurgical materials, thermal insulation materials and so on.
Rongsheng Refractories Group







