Grades and Grade Descriptions
Quadralock ™ Inserts
Coatings provide high-speed
capability and are engineered
for fi nishing to light roughing.
P Steel
M Stainless Steel
K Cast Iron
N Non-Ferrous
S High-Temp Alloys
H Hardened Materials
wear
resistance
Coating
Grade Description
toughness
05 10 15 20 25 30 35 40 45
P
Uncoated carbide. A very tough, ultra-fi ne grain unalloyed substrate. For
general-purpose machining of most steels, stainless steels, high-temperature alloys,
titanium, irons, and non-ferrous materials. Performs best at low speeds
and will handle interruptions and high feed rates. Use when C2, C3, or C25
fail due to chipping or breaking.
M
K
N
S
HW-S25
P
A PVD-TiN-coated grade. Straight 9.5% Co substrate. Submicron grain. For
general-purpose machining of most steels, stainless steels, high-temperature alloys,
titanium, irons, and non-ferrous materials. Performs best at low speeds and
will handle interruptions and high feed rates.
M
K
N
S
widia.com
D77
HC-S25