T.O. 1-1A-9
5-42. WELDING CHARACTERISTICS.
MATERIAL
FILLER METAL
REMARKS
Unalloyed Commercially Pure
Commercially Pure
Stress Relieve after welding;
Spec Comp A, Band C
AMS 4951
resistance (spot and seam)
may be accomplished without
protective atmosphere.
4A1-4Mn
Not recommended for
welding.
4A1-3Mo-lV
6A1-4V (AMS4954
For resistance welding use
3A1 or AMS4951
technique similar to those
used for austenitic stain-
less steels.
5Al-1.5Cr-1.5Fe-IMo
Not currently recommended
for welding, however, procedures
under development.
5A1-2.7SCr-1.25Fe
Fusion welding not
Spot welding can be satisfactory
recommended.
accomplished.
5A1-2.5Sn
5A1-2.5Sn AMS 4953,
Fusion welding by the heli-
3A1, or commercially
arc method is recommended
pure AMS4951.
for welding
Also readily
weldable by spot and seam
methods. Welds have good
ductility and mechanical
properties comparable to
base metal. Difficulty may be
experienced from porosity
after welding.
5AI-5Sn-5Zr
Alloy has good properties in
welded condition. Improvement -
in properties can be
achieved by post weld stress
relief annealing. Readily
weldable by resistance methods.
Under most conditions of
exposure to elevated temperature,
lost of strength of
spot welds is lower than
parent metal.
7A1-12 Zr
Only limited data available.
Present data indicates fusion
and resistance welding is
readily accomplished by use
of technique common to other
titanium alloys. Fusion welds
are somewhat more notch
sensitive than parent metal.
Stress relieving at 1300,
¾ hr recommended to
minimize stress corrosion
cracking; avoid stress relieving
at 1200°F or below.
8Al-2Cb-lT2
Current data indicates
alloy readily weldable with
same techniques used for
unalloyed titanium.
5-11
