Fused Zirconia Alumina (ZA25 & ZA40)

Fused Zirconia Alumina is a premium abrasive material composed of aluminum oxide and zirconium oxide. It combines the hardness of alumina with the toughness of zirconia, delivering superior grinding performance and extended service life.

Available in two main grades — ZA25 (25% ZrO₂) and ZA40 (40% ZrO₂) — it is ideal for heavy-duty grinding, cutting and surface preparation of hard materials.

Main Applications

Grinding wheels for steel and stainless steel
Coated abrasives (sandpaper, sanding belts, discs)
Blasting media for surface preparation
Precision grinding and cutting operations
Heavy-duty metalworking applications
Surface finishing and deburring

Product Grades

ZA25: Lower zirconia content for versatile grinding applications

ZA40: Higher zirconia content for heavy-duty grinding operations

Chemical Composition

Item	ZA-25		ZA-40
Item	Min / Max	Typical	Min / Max	Typical
ZrO₂	24–27%	25.8%	38–42%	39.88%
Al₂O₃	≥72%	72.6%	57–60%	59%
SiO₂	≤0.70%	0.50%	≤0.60%	0.40%
TiO₂	≤0.70%	0.35%	≤0.50%	0.43%
Fe₂O₃	≤0.30%	0.20%	≤0.30%	0.15%
CaO	≤0.15%	0.14%	≤0.15%	0.12%

Physical Properties

Property	ZA-25	ZA-40
Colour	Grey	Grey
True Specific Gravity	4.30 g/cm³	4.60 g/cm³
Bulk Density	2.00–2.40 g/cm³	1.90–2.30 g/cm³
Melting Point	1950°C	1900°C

Grit Sizes Available (FEPA)

F8 F10 F12 F14 F16 F20 F22 F24 F30 F36 F40 F46 F54 F60 F70 F80 F90 F100 F120 F150 F180 F220 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200

Particle size distribution available according to ISO, ANSI, FEPA and JIS standards.

Packaging

40 × 25 kg plastic woven bags in jumbo bag
Custom packaging available upon request