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I
I
thickness
of
the
die
unless
otherwise
(
m
i
'
w
b
"
e
d
b
~
s
p
e
c
i
f
i
e
d
.
,
..
q
allowabale
limits.
Decarburization
shall
be
-t
hardened and ground steel
guide pins and bushings is permitted.
3.2.3 Type III forging dies Grade A and B.
3.2.3.1 Material. The steel selected for these
forging dies shall be of a type which after
heat treatment shall possess sufficient red
~
-
~
~
w
d
i
t
i
e
h
3.2.3.2 Design. Grade A dies shall be of
multiple cavity design; Grade B dies shall be
of single cavity design.
3.2.3.2.1 Inserts. Inserts may be used pro-
vided they are locked in place to prevent any
movement. They can also be used to over-
come complicated heat treating conditions.
They should not be used where their applica-
tion would be detrimental
3.2.3.2.2 Sections. To facilitate mainte-
nance, accuracy, and machinability, sections
bling under working pressure. Thin cutting may be used provided they are properly in-
4
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