A systematic test of I(c), hysteresis loss and RRR on advanced Nb3Sn s
trands from industrial production has been carried out at European Lab
oratories, highlighting the reproducibility of the test results, the c
alibration, the accuracy, as well as the scattering among specimens or
the same type. Practical recommendations are drawn for reliable accep
tance testing of large series production of Nb3Sn strands.