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GRADE CHART · NTK

NTK Carbide Grade Chart

This table lists the ISO application class each NTK grade is positioned at, per manufacturer-published grade comparison charts in the grade_equivalence reference database. Positioning at the same ISO class does not mean grades are interchangeable between manufacturers — substrate, coating and edge preparation still differ, even at the same class.

33 grades 75 positioning records 20 ISO application classes grade_equivalence reference DB
01 · POSITIONING

NTK grades by ISO application class

P05 (1 grade)

GradeISO classCoatedVerification tier
DT4P05—Tier 1

P10 (6 grades)

GradeISO classCoatedVerification tier
CP7P10YesTier 2
DM4P10—Tier 2
DT4P10—Tier 2
TM1P10—Tier 1
TM4P10—Tier 1
VM1P10—Tier 1

P20 (6 grades)

GradeISO classCoatedVerification tier
CP7P20YesTier 2
DM4P20—Tier 2
DT4P20—Tier 2
QM3P20—Tier 2
TM4P20—Tier 2
VM1P20—Tier 2

P30 (4 grades)

GradeISO classCoatedVerification tier
DM4P30—Tier 1
QM3P30—Tier 2
TM4P30—Tier 2
ZM3P30—Tier 2

M10 (2 grades)

GradeISO classCoatedVerification tier
DM4M10—Tier 2
ZM3M10—Tier 2

M20 (3 grades)

GradeISO classCoatedVerification tier
DM4M20—Tier 2
DT4M20—Tier 2
ZM3M20—Tier 2

M30 (3 grades)

GradeISO classCoatedVerification tier
DM4M30—Tier 2
DT4M30—Tier 2
ZM3M30—Tier 2

K01 (5 grades)

GradeISO classCoatedVerification tier
B16K01—Tier 1
B23K01—Tier 1
B30K01—Tier 1
HB55K01—Tier 1
HB56K01—Tier 1

K05 (1 grade)

GradeISO classCoatedVerification tier
CP1K05YesTier 1

K10 (6 grades)

GradeISO classCoatedVerification tier
B16K10—Tier 1
CP1K10YesTier 2
HB569K10—Tier 1
HB57K10—Tier 1
HB580K10—Tier 1
KM1K10—Tier 1

K20 (7 grades)

GradeISO classCoatedVerification tier
DM4K20—Tier 1
HB56K20—Tier 1
HB569K20—Tier 1
HB57K20—Tier 1
HB580K20—Tier 1
KM3K20—Tier 1
PTH13SK20—Tier 1

K30 (1 grade)

GradeISO classCoatedVerification tier
HB57K30—Tier 1

N01 (1 grade)

GradeISO classCoatedVerification tier
PD1N01—Tier 2

N10 (3 grades)

GradeISO classCoatedVerification tier
HD100N10—Tier 1
HD60N10—Tier 1
PD2N10—Tier 1

N20 (1 grade)

GradeISO classCoatedVerification tier
PD2N20—Tier 2

S01 (2 grades)

GradeISO classCoatedVerification tier
HB55S01—Tier 1
HB580S01—Tier 1

H01 (7 grades)

GradeISO classCoatedVerification tier
B52H01—Tier 1
B5KH01—Tier 2
HB52H01—Tier 1
HB55H01—Tier 1
HB550H01—Tier 1
HB580H01—Tier 1
HB590H01—Tier 1

H10 (8 grades)

GradeISO classCoatedVerification tier
B36H10—Tier 2
B5KH10—Tier 1
B6KH10—Tier 2
HB52H10—Tier 1
HB55H10—Tier 1
HB550H10—Tier 1
HB580H10—Tier 1
HB59H10—Tier 1

H20 (5 grades)

GradeISO classCoatedVerification tier
B36H20—Tier 2
B6KH20—Tier 2
HB57H20—Tier 1
HB580H20—Tier 1
HB59H20—Tier 1

H30 (3 grades)

GradeISO classCoatedVerification tier
B40H30—Tier 2
HB57H30—Tier 1
HB580H30—Tier 1

Source: manufacturer grade-comparison charts, ingested into the grade_equivalence reference table with page-level provenance. Rows with no verification (tier 0, model-only) are excluded from this table.

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02 · CROSS-BRAND COMPARISON

See NTK against every other brand

No cross-referenced pairs in the dataset currently involve NTK (a pairing needs to appear in two or more published cross-reference charts from tooling manufacturers, with no conflicting source found on review). Coverage grows as more manufacturer charts are ingested.

Compare NTK grades against 15 other brands - EUR 19

carbide grade comparison chart · carbide insert cross reference chart