The phrase "attain a constant" is correct and usable in written English.
It can be used in contexts where you are discussing achieving a stable or unchanging value, often in scientific or mathematical discussions.
Example: "In order to ensure the accuracy of our measurements, we need to attain a constant temperature throughout the experiment."
Alternatives: "achieve a constant" or "reach a constant value".
In the second phase, water cementitious binder ratios of the specimens were adjusted to attain a constant unconfined concrete strength for specimens containing different amounts of silica fume.
Their values show a hump within an interval and after that they tend to attain a constant value.
While for G-L theory, its value initially oscillates and then decreases to attain a constant value with increase in frequency.
Mortar prisms were oven dried at 105°C for 12 hours to attain a constant weight prior to testing and in order to prevent the continuation of hydraulic reactions.
It is observed that initially the absorbance of SPR band increases while increasing the quantity of extract; at higher volumes it tends to attain a constant value (Figure S4b).
Thus the Met regulatory system apparently leads to maximum induction whenever Met becomes limiting to any degree, and then decreases expression, possibly to attain a constant steady-state cellular Met level that is independent of the concentration in the media.
The interfacial thickness increased with annealing time and then attained a constant value, depending on temperature and net concentration of reactive sites (maleic anhydride units) in the styrenic phase.
Inspecting latitudinally variable solar wind conditions as found from observations by McComas et al. (2000) we predict latitudinal variations of primary proton temperatures and show that the secondary proton temperature with increasing radial distance asymptotically attains a constant value with a magnitude essentially determined by the actual solar wind velocity.
The samples were again dried at 100°C until attaining a constant weight.
The triplicate samples were dried in an electric oven at 100°C until they attained a constant weight.
The color of the solution changed from yellow to dark brown in 2 min, the intensity of the color increased with time and finally attained a constant value in 40 min implying that the formation of AgNPs is almost complete (Fig. 1a).
