A blast nozzle is a wear part. Abrasive that cuts steel also cuts the liner. Life depends on liner material and on the abrasive, not on marketing hours printed as a guarantee.
Typical industry ranges (not a warranty): ceramic / iron nozzles last tens of hours. Tungsten carbide (WC) often lasts a few hundred hours on copper slag, garnet or steel grit. Silicon carbide sits in between. Boron carbide (B₄C) often lasts several times longer than WC and is the usual choice for aluminium oxide. Exact hours move with pressure, grit size and operator technique.
- Copper slag / steel grit / garnet: tungsten carbide is the usual Indian site nozzle.
- Aluminium oxide / SiC grit: boron carbide pays back; WC wears very fast.
- Replace when the bore grows. A worn nozzle wastes compressor fuel and drops profile.
- Venturi nozzles out-produce straight bores of the same orifice on open steel.
BLAST APEX lists tungsten carbide nozzles (5–12 mm bore) as stock spares because they match our pot range and the abrasives we sell most: copper slag, steel grit, garnet. Ask if the job is Al₂O₃ cabinet work — we will not sell a WC nozzle into a job that will destroy it in a week.