T.O. 1-1A-9
TABLE 2-18. FUSION WELDING CHARACTERISTICS OF CORROSION RESISTING STEEL - GENERAL(CONT’D)
ALLOY/DESIGN
RECOMMENDED
FILLER MATERIAL/SPEC
HEAT TREATMENT
REMARKS
TYPE
STRUCTURE
TYPE
ELECTRODE
ROD
PREHEAT
POSTHEAT
MATERIAL
TREAT
17-7
age hardening
nealed and subse-
PH (Cont'd)
at 950
F.
quently heated metal
Slightly higher
yields a weld of 95%
strength may
efficiency welding of
be obtained by
condition TH1050
austenitic
yields a weld at 65%
conditioning
efficiency. Copper
1600
F and
chill blocks with
age hardening
grooves should be
at 900
F.
used to inert back side
of weld. In condition
A 17-7PH alloy is
primarily austenitic
containing 5-20 fer-
ritic.
19-9
Austenitic
19-9WX
AMS 5782
None re-
Stress re-
Heating should be
DL
19-9WMO
MIL-R-5031
quired.
lieved at
accomplished in a
19-9
MIL-E-6844
Class 6
1200
F
neutral or slightly
DX
Class 19
minimum
oxidizing atmosphere.
AMS 5785
and pre-
ferably full
annealed at
1800
F air
cool.
AM350
AM350
AMS 5775
AMS 5774
Not re-
To heat treat
Weldable by using
AM355
AMS 5781
AMS 5780
quired
to condition SCT, same procedures as
308
MIL-E-
MIL-R-5031
use same full
those used for aus-
22200/2
C11 MIL-R-
heat treatment
tenitic stainless
309
MIL-E-
5031 C12
as for unwelded
steel, it is easier to
22200/2
material when
weld than ferritic or
age hardening
martensite steel and
to condition
preheating or post
DA subsequent
weld heating not re-
annealing to
quired. This material
condition L is
remains ductile during
not required,
cooling although struc-
if AM350
ture changes from aus-
weld metal is
tenitic to 15% marien-
used. If AM
site. Welding can be
355 filler
accomplished in all
metal is used
conditions. The re-
however, an-
commended techniques
nealing to con-
for welding the princi-
dition L should
pal forms are electric
precede the
resistance, tungsten
condition DA
electrode and consum-
aging treat-
able electrode inert
ment.
gas welding. Where
high strength is not re-
quired 308/309 elec-
trode and filler wire
may be used. Heat
treated welds having
90-100% joint effici-
ency in light gage
metal can be obtained
2-99
