By exploitation factorial experiments the suitable levels of metal, molybdenum, aluminum,
titanium and metal were determined. The metal solubility within the alloy perceived to be
about 2.5% and redoubled with decreasing MO + chromium content. The metallic element solubility was
determined to be concerning zero.5%.
Little modification in properties was detected with Nb additions up to twenty-eight. Molybdenum
increased the strength of the matrix and will alone or through some interaction with Nb
increase the age-hardening response and reduce the impact strength when exposure.
Increasing metal content from sixteenth to twenty two caused a rise within the strength of the
matrix however didn't seem to own any impact on the age-hardening response at these levels
of metal. Molybdenum, metal and particularly Nb impart creep strength to the
alloy These effects are shown in Figures four and five.
Aluminum and atomic number 22 were designedly
kept low to reduce
the age-hardenability of the
alloy. Creep tests performed at
49°C (1200°F) showed a substantial
benefit, however, in
retaining level of around zero.2%,
versus O.O%, for every of those
elements an extra advantage
to an occasional level of AI+Ti was improved
weldability and brazeability.
Nickel plating, which
was nearly a necessity once
brazing alloys with higher levels
of AI+Ti, was unneeded.