SX7Roughing (no scale) to semi-finishing heat resistant alloys | Sialon ceramic

Wear resistant Sialon ceramic material

Better notch resistance than whisker ceramics

Improved boundary wear resistance to prevent cutting edge wear and breakage

Product video


  • Better notching resistance compared to whisker ceramics
    No need to program ramping to shift wear on insert
  • Better flank wear resistance compared to other Sialons and is ideal for semi-finishing Inconels and Waspaloy
  • Excellent thermal shock resistance

Tooling application

Roughing with no scale to semi-finishing heat resistant alloys
Turning/Grooving/ Milling

Grade characteristics

Cutting conditions

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Grade Material Operation type Machining Cutting speed (SFM) Feed (IPR / IPT) DOC(inch) Coolant
SX7 Heat resistant alloys Turning Roughing 600 – 1100 .005 - .010 .040 - .100 WET
Profiling / Semi-finishing .040 - .080
Grooving 600 - 900 .0025 - .006 -
Milling Indexable 1800 - 4000 .003 - .005 .040 -.100 DRY

Why are Sialon ceramics so effective at high-speed machining of heat resistant alloys?

Silicon nitride (Si3N4) is combined with Aluminum (Al) and oxygen (O) to make SiAlON.
Sialon has needle-shaped particles similar to that of Silicon nitride.
The arrangement of these particles makes the material withstand the impact force during cutting.
The addition of the alumina improves its heat resistance characteristics.
The property advantages makes it perfect for machining heat resistant alloys.

Semi-finishing Inconel material

Milling Inconel

Case study

Seal part (finishing)
Material :
Cutting speed :
800 SFM
Feed :
.080 IPR
.020 inch
Coolant :

7min / part

Competitor's whisker

15min / part

Cutting speed : 370 SFM
Competitor's carbide

24min / part

Cutting speed : 170 SFM
SX7's excellent wear resistance allows high-speed machining.
So, highly efficient machining is achieved compared to whisker and carbide tools.
Turbine case (semi-finishing)
Material :
Cutting speed :
800 SFM
Feed :
.012 IPR
Varied DOC
Coolant :

7min / part

Competitor's whisker

5min / part Broken

SX7 insert achieved more stable machining due to its excellent notching resistance compared to the competitor's whisker insert.

Tool lineup

Please check product catalog for tooling lineup