Inzuzo:
Lo mklamo uphumela ekumelaneni okuphezulu nokushaqeka okushisayo, ukuguguleka, ukumelana ne-oxidation kanye nenkonzo ende.
Zibonisa izici zokumelana nokushaqeka okuhle kakhulu kokushisa, ukusebenza okuzinzile, ukugqwala okuhle nokuguguleka, nokumelana nokuqhekeka okuqinile.| Izinkomba | Upper bese uqoqa umlomo wombhobho | ||
| ZA70 | ZA75 | ZA80 | |
| I-Al2O3≥ | 70 | 75 | 80 |
| C ≥ | 3 | 3 | 3 |
| Ukuminyana ngobuningi(g/cm3) ≥ | 2.7 | 2.85 | 2.85 |
| I-porosity ebonakalayo ≤ | 10 | 10 | 10 |