Primo grado | Secondo grado | |
Ni | 34%min | 32%min |
Cu | 0.01% max | 0.01% max |
Fe | 0.01% max | 0.02% max |
Zn | 0.05% max | 0.05% max |
SO4 | 0.5% max | 0.5% max |
Cl- | 0.05% max | 0.05% max |
Acqua Insol materia | 0.4% max | 0.5% max |