D. Fischer et K. Hulse, MANUFACTURE AND PROPERTIES OF HEAVY THICK -WALLED OPEN-DIE FORGINGS OF THE LOW-ALLOYED TITANIUM TI-0.3MO-0.8NI FOR CHEMICAL-PLANT CONSTRUCTION, Metall, 47(8), 1993, pp. 718-722
The low-alloyed titanium grade Ti-0.3Mo-0.8Ni, ASTM/ASME Grade 1 2, ex
hibits improved corrosion resistance, higher strength and permits high
er design loads than unalloyed grades. This combination of properties
has led to an increased economic interest in this alloy. Thick-walled
heavy open-die forgings cannot be considered as standard-components. N
evertheless, they must comply with the standard material requirements
in order to benefit from the advantages of the Grade 12 alloy. By sett
ing an optimum composition of the vacuum-melted ingot in conjunction w
ith suitable forming and heat treatment parameters it is shown that th
e desired characteristics can be reached with a high rate of repeatabi
lity with properties nearly equivalent to those of thinwalled forgings
. The review of the properties of low-alloy Grade 1 2 titanium parts i
s followed by a comparisation with the characteristics of common unall
oyed titanium grades at room temperature and elevated temperatures.