... 2, The surface should be smooth, clean, free from blister and roughness, with low oil, and the product has good mechanical property.3 ... Technical Committee of Weldingthe drafter of National standard for lead- free solder B. abtained Honour: National Key Hi-tech Enterprise( ... materials;solder wire ( low melting point, oxidation-resistant) ;lead free solder wire E Markets:China: 60% shareU.S.A, MEXICO ...