1/4"
Sq
x
457
mm.
Nominal
dimensions
quoted
doesn't
mean
exact
size.
Tolerance
values
aren't
quoted.
I
will
combine
multiple
orders
as
one
delivery
for
bidders.
Maximum
postal
weight
is
20
kgs/
parcel.
Maximum
lengths
is
1.05M
I
charge
$5.50
fee
for
multiple
packing
and
associated
materials.
Attention
Multiple
buyers!
Please
contact
your
seller
regarding
postal
adjustments
before
you
consider
making
payments.
A
TAX
INVOICE
IS
PROVIDED.
Weight
=
0.145
kgs
Nominal
Analysis
Carbon
0.95%
Manganese
1.20%
Chromium
0.55%
Tungsten
0.55%
Vanadium
0.20%
(A.I.S.I.
Class
01)
Newhall/
K.E.672
is
an
oil-hardening
carbon
manganese
tool
steel
containing
tungsten
and
chromium.
This
steel
is
non
deforming
in
heat
treatment
with
minimum
movement.
Saben
Precision
Ground
Flat
Stock
of
electrically
melted
Newhall/
K.E.672
alloy
steel
is
available
in
18
inch
standard
lengths
and
other
lengths.
This
is
an
ideal
material
for
the
production
of
many
types
of
precision
tools,
gauges,
jigs,
templates,
punches,
dies
and
machine
parts.
Cost-saving.
By
selecting
the
appropriate
size
of
flat
stock,
machining
operations
and
cost
of
production
can
be
reduced
to
a
minimum.
Skilled
labour
can
be
released
for
other
work.
Freedom
from
decarburisation.
By
using
ground
flat
stock,
the
toolmaker
starts
with
a
decarburisation-free
bar,
thus
ensuring
best
response
to
heat
treatment.
Size
accuracy.
We
employ
the
latest
type
precision
grinding
machinery
and
the
flat
stock
is
supplied
to
the
limits
shown
below
Good
Machinability.
Sanderson's
Precision
Ground
Flat
Stock
is
supplied
in
the
fully
softened
condition
ready
to
saw
or
machine.
On
hardening,
it
becomes
highly
resistant
to
wear.Consistent
Quality.
The
flat
stock
is
made
throughout
in
our
own
works,
from
melting
to
finish
grinding.
Manufacture
under
one
control
ensures
consistency
from
batch
to
batch.
Bars
and
plates
present
an
excellent
surface
finish.
They
are
individually
packaged
and
protected
from
rust.
Tolerances
Inch
Sizes
Thickness
+
or
-0.001"
Width
-
18"
lengths
-0.000"+
0.010"
according
to
width.
Width
--
24"
and
36"
lengths
-0.000"
+
0.015"
according
to
width.
Metric
Sizes.
Thickness
+
0.05/
--0
mm.
Width
Up
to
30
mm
+
0.2/
-.0
mm.
Over
30
-
120
mm
+
0.3/
-
0
mm.
Over
120
-
300
mm
+
0.4/
-
0
mm.
HEAT
TREATMENT.
Saben
flat
stock
hardens
in
oil
at
a
low
temperature
with
minimum
movement.
To
harden
Quench
in
oil
from
780°C.
(1,436°F.)
to
820°C.
(1.508°F.)
according
to
section.
Resultant
hardness
will
be
Rockwell
C63/64.
Tempering
will
then
be
necessary.
Martempering
Martempering
is
an
alternative
hardening
procedure
which
may
be
used
when
suitable
salt
bath
equipment
is
available.
By
this
method,
internal
strain,
distortion
and
risk
of
quench
cracking
are
reduced
to
the
minimum.Pre-heat
at
360°C.
(680°F.),
then
heat
to
800°C.
(1,472°F.)
for
for
sections
1/8''
thick
or
less,
or
to
820°C.
(1,508°F.)
for
sections
over
1/8"
thick.
Soak
according
to
section,
then
quench
into
molten
salt
held
at
210°C.
(410°F.).
Allow
sufficient
time
for
the
centre
of
the
piece
to
reach
bath
temperature,
withdraw
and
cool
in
the
air.
Tempering
will
then
be
necessary.
Tempering.
Temper
for
one
hour.
150°C.
(302"F.)
to
obtain
Rockwell
C62.
200°C.
(392°F.)
to
obtain
Rockwell
C60.
250°C.
(482°F.)
to
obtain
Rockwell
C58.
350°C.
(662°F.)
to
obtain
Rockwell
C56.