Strain effects on critical current densities have been examined for conductors containing nearly stoichiometricNb3Alfilaments with fine grains. TheNb3Alphase in these multifilamentary conductors are prepared by phase transformation from supersaturated Nb(Al) bcc solid solution and show high-field critical current densities much larger than those for conventionally preparedNb3Alconductors, where theNb3Alphase is known to be off-stoichiometric. The degradation of critical current densities with−0.7&percent;intrinsic strain is ca. 20&percent; at 12 T, comparable with those for conventionalNb3Alconductors of high strain tolerance. ©1997 American Institute of Physics.