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How To Choose

The Correct Carbide Grade?

As the people engaged in production like to say, the best carbide grade is the grade that you have in MILLING TITANIUM
your stock. This statement (which can be related to the cutting tool as a whole) is probably true if it
is a production situation that requires an operative decision. However, productive process planning,
or effective tool stock managing requires more serious applicative analyzing of the pros and cons
of the proposed carbide grades. Fig. 3-6 with schematic representations of the application
field of the grades, illustrate clearly the conclusions regarding recommended grade selection.

Indexable Milling Cutters
IC840 is the most universal carbide grade, and therefore it should be considered as the
first-choice grade, especially in the most general cases of process engineering.

Grade IC808 features higher hardness compared to IC840. It is suitable mostly for
semi-finish and finish operations and may be defined as a second-choice grade.
IC882 is the strongest among the main cemented carbide grades for indexable
milling titanium. It is intended primarily for heavy duty milling, machining in
unfavorable conditions, for cases with significant impact load, etc.

With regards to the complementary grades, IC380 has proved itself, in milling when
the rigidity of a technological system is high; and IC5820 shows impressive results
in machining with high pressure coolant supply (HPC), preferably pin-pointed.

Comparative characteristics of grade performance in specific cases
of indexable milling titanium are shown in Table 4.

Table 4 Performance Of Carbide Grades In Specific Milling Applications
Comparative performance

Heavy duty Fast feed HPC* Unfavorable High rigidity Finishing at
Cutting Milling (FF) Conditions Of system Small ae**
Grade
IC808 ♦ ◊ ♦ ♦ ♦♦◊ ♦♦♦

IC840 ♦♦ ♦♦ ♦♦◊ ♦♦ ♦♦ ♦♦
IC882 ♦♦♦ ♦♦♦ ♦ ♦♦♦ ♦♦ ♦◊

IC380 ♦ ♦ ♦ ♦ ♦♦♦ ♦♦

IC5820 ♦◊ ♦◊ ♦♦♦ ♦◊ ♦♦◊ ♦♦◊
IC830 ♦◊ ♦♦ ♦ ♦♦ ♦♦ ♦◊

IC330 ♦♦ ♦♦ ♦◊ ♦♦◊ ♦◊ ♦

* high pressure coolant supply
** ae - width of cut

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