HC2/HC5

For continuous machining of gray cast iron and hardened materials | Alumina TiC based ceramics

For continuous machining of gray cast iron and hardened materials

Home / Cast Iron - Grade / HC2/HC5

All-purpose grade for machining gray cast iron and hardened materials

Well balanced grade between wear resistance and chipping resistance

HC2: Well-balanced grade for gray cast iron
HC5: Developed for use in hard turning applications for mill rolls
Excellent toughness combined with wear resistance

Cutting conditions

- - - Scroll the table - - -

Grade	Material	Operation type	Machining	Cutting speed (m/min) Cutting speed (SFM)	Feed(mm/rev) Feed (IPR /IPT)	DOC(mm) DOC(inch)	Coolant
HC2	Gray cast iron	Turning	Semi-finishing to finishing of Gray cast iron	360 – 640 1200 -3300	0.1 – 0.4 .004 – .016	-1.5 – .059	DRY / WET
HC5	Chilled cast iron	Turning	Roughing to finishing of cast iron and steel mill rolls	90 – 180 300 -600	0.1 – 0.3 .004 – .012	0.6 – 1.9 .024 – .075	DRY

Case study

Cylinder liner
Material : Gray cast iron
Cutting speed : 600 m/min 1970 SFM (HC2) 400 m/min 1310 SFM (competitor’s carbide)
Feed : 0.5 mm/rev .020 IPR
DOC : 0.7 mm .028 inch
Coolant : DRY
HC2	110 pcs / corner
Competitor’s carbide	40 pcs / corner

HC2 achieves 1.5 times higher machining efficiency and nearly three times longer tool life than other competitors’ carbide.

April 23, 2025

As brake disc machining evolves, NTK’s ceramic solutions deliver higher speeds, longer tool life, and ...

For more information about this product, visit our online e-catalog, or download the catalog/product report