CSN EN IEC 61788-23 ed. 2

CSN EN IEC 61788-23 ed. 2 This part of IEC 61788 addresses a test method for the determination of the residual resistance ratio (RRR), rRRR, of cavity-grade niobium. This method is intended for high-purity niobium grades with 150 < rRRR < 600. The test method is valid for specimens with rectangular or round cross-section, cross-sectional area greater than 1 mm2 but less than 20 mm2, and a length not less than 10 nor more than 25 times the width or diameter.
Original English text of CSN EN Standard.
The price of the Standard included all amendments and correcturs.