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Technical Section - General
Tool Materials
High Speed Steel
A medium-alloyed high speed steel that has good machinability and good performance.
HSS exhibits hardness, toughness and wear resistance characteristics that make it
attractive in a wide range of applications, for example in drills and taps.
Cobalt High Speed Steel
This high speed steel contains cobalt for increased hot hardness. The composition of
HSCo is a good combination of toughness and hardness. It has good machinability
and good wear resistance, which makes it usable for drills, taps, milling cutters and
reamers.
Non Cobalt Powder Metallurgy Steel
Has a finer and more consistent grain structure than HSCo resulting in a tougher
product. Tool life and wear resistance is normally higher than HSCo and this grade
has superior edge strength and rigidity. Mainly used for milling cutters and taps.
Sintered Cobalt High Speed Steel
HSCo-XP is a Cobalt high speed steel which has been produced using powder
metallurgy technology. High speed steel produced by this method exhibits superior
toughness and grindability. Taps and milling cutters find particular advantage when
manufactured from XP grade steel.
Chromium Steel
Chromium steel is a tool steel in which the principal alloying element is Chromium. It
is used only for the manufacture of taps and dies. This steel has lower hot hardness
properties in comparison with high speed steels. Suited for hand tap applications.
Grade
Hardness
(HV10)
C
% W % Mo
%
Cr
%
V
%
Co
%
Tool Material
M2 810-850 0.9 6.4 5.0 4.2 1.8 - HSS
M35 830-870 0.93 6.4 5.0 4.2 1.8 4.8
M42 870-960 1.08 1.5 9.4 3.9 1.2 8.0
- 830-870 0.9 6.25 5.0 4.2 1.9 -
HSCO
HSS Powder
Metal
ASP
2017
ASP
2030
ASP
2052
860-900 0.8 3.0 3.0 4.0 1.0 8.0
870-910 1.28 6.4 5.0 4.2 3.1 8.5
870-910 1.6 10.5 2.0 4.8 5.0 8.0
HSCO
Powder Metal
- 775-825 1.03 - - 1.5 - -
Chromium
Steel
489