GENERAL PURPOSE HIGH SPEED STEELS
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Type | CHEMICAL | COMPOSITION | |||||
Carbon | Tungsten | Molybdenum | Chromium | Vanadium | Hardness Rockwell C | Term | |
M1 | .80 | 1.50 | 8.00 | 4.00 | 1.00 | 63-65 | "HSS" |
M2 | .85 | 6.00 | 5.00 | 4.00 | 1.90 | 63-65 | "HSS" |
M7 | 1.00 | 1.75 | 8.75 | 4.00 | 2.00 | 63-65 | "HSS" |
M50 | .85 | .10 | 4.25 | 4.00 | 1.00 | 63-65 | "HSS" |
COBALT HIGH SPEED STEELS
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Type | CHEMICAL | COMPOSITION | ||||||
Carbon | Tungsten | Molybdenum | Chromium | Vanadium | Cobalt | Hardness Rockwell C | Term | |
M35 | .80 | 6.00 | 5.00 | 4.00 | 2.00 | 5.00 | 65-67 | "5% COBALT" |
M42 | 1.10 | 1.50 | 9.50 | 3.75 | 1.15 | 8.00 | 65-67 | "SUPER COBALT" |
M1
"HSS" is used for making drills
that will be used in a wide variety of applications.
M1 has some of the increased red-hardness properties
of M2, is less susceptible to shock, and has
"flex" capabilities generally favored
for general purpose work.
M2
"HSS" is the standard material used for all ICS HSS
cutting tools. M2 has good red-hardness and
retains its cutting edge longer than other
general purpose high speed steels, not as
shock resistant or as flexible as other HSS
grades with less tungsten. Generally favored
for high production machine work.
M7
"HSS" is used for making heavier construction drills
that can be used for portable drilling of
hard sheet metal alloys. Generally favored
for work in Aircraft plants where flexibility
and extended drill life are equally important.
M50
"HSS" is used for making drills that will be used
for portable drilling and where breakage
is a problem due to flexing the drill. Does
not have the red-hardness of other grades
of HSS with tungsten. Generally favored for
Hardware and Contractor use, although they
are also sold for industrial uses.
M35
"5% COBALT" is only used by ICS for making tool bits. It
has some of the increased red-hardness properties
of M42, and is not quite so susceptible to
shock.
M42
"SUPER COBALT" is the standard cobalt material used for all
ICS cobalt cutting tools. It has excellent
resistance to abrasion and very good red-hardness
for working difficult materials.
Tungsten Note: Generally
speaking, a cutting tool made of high speed
steel containing the element tungsten will
possess the very desirable property of
"red-hardness". This enables tools
to cut at a dull red heat (up to 1000° F)
without loss of hardness or rapid dulling
of cutting edge. Cobalt high speed steel will
exhibit even greater red-hardness and wear
resistance.
Super HSS Note: The
term "SUPER HSS" is not definitive
and can mean almost anything that one wants
it to mean from ordinary M50 to High Cobalt
material.