Повучен
ISO 21068-3:2008 specifies methods for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and free metallic and oxidic components in silicon carbide raw materials and refractory products.
It applies only to silicon carbide materials that are not bonded with nitrogen. Nitride-bonded silicon carbide refractories are covered in EN 12698-1.
ПОВУЧЕН
ISO 21068-3:2008
95.99
Повучен
10. 6. 2024.
ОБЈАВЉЕН
ISO 21068-3:2024
Hemijska analiza vatrostalnih proizvoda i sirovina koji sadrže silicijum-karbid — Deo 3: Određivanje azota, kiseonika, metala i oksida
95.99 Повучен