SX9Machines through scale on heat resistant alloys | Sialon ceramic

Excellent notch and flank wear resistant ceramic

Best thermal shock resistance

Best grade for roughing heat resistant alloys like Inconel 718 with scale

Product video


  • Sialon with excellent notch and flank wear resistance
  • Superior toughness compared to whisker ceramics
  • Best thermal shock resistance, perfect for milling applications
  • Best grade for roughing Inconel with scale

Tooling application

Heat resistant alloys
Turning / Milling / End milling: roughing operations

Grade characteristics

Cutting conditions

Scroll the table →

Grade Operation type Machining Cutting speed (SFM) Feed (IPR / IPT) DOC(inch) Coolant
SX9 Turning Roughing (scale or no scale) 600 – 1000 .004 - .014 .040 - .200 WET
Profiling / Semi-finishing 600 – 1000 .004 - .012 .040 - .080
Milling Indexable 1500 - 3500 .004 - .006 .040 -.100 DRY
End milling - 1000 - 3300 .002 - .004 -

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.

Machining Inconel with scale

Milling Inconel

End milling Inconel

End milling gray cast iron

Case study

Aircraft part (with scale)
Material :
Cutting speed :
600 SFM
Feed :
.0079 IPR
〜 .0236 inch
Coolant :

2 pcs / corner

Competitor's whisker

1 pcs / corner

SX9 is a significant cost advantage and double the tool life compared to competitor's whisker insert.
Ring (with scale)
Material :
Cutting speed :
670 SFM
Feed :
.0039 IPR
.0984 inch
Coolant :

10 pass

Competitor's whisker

5 pass

SX9 doubled the tool life compared to the competitor's whisker grade.

Tool lineup

Please check product catalog for tooling lineup