华中农业大学2008研究生入学考试理论力学试题.doc

Laboratory Data Sheet Product 370(WRAP ) March 2003 NOT FOR PRODUCT SPECIFICATIONS THE TECHNICAL INFORMATION CONTAINED HEREINARE INTENDED AS REFERENCE ONLY. PLEASE CONTACT LOCTITE CORPORATION QUALITY DEPARTMENT FOR ASSISTANCE AND MENDATIONS ON SPECIFICATIONS FOR THIS Cored Solder Wire RA Type PRODUCT DESCRIPTION Multicore ? 370 (formerly WRAP) solid flux for cored solder wire has been specially formulated to conform to the QQ-S- 571E Type RA specific ation. Multicore ? 370 solid flux is our most popular flux for TV and electronics soldering in the . market. It is a non-corrosive activated flux that has good activity on most surfaces. TYPICAL PROPERTIES Alloys: The alloys used for 370 cored solder wires conform to the purity requirements of mon national and international standards (QQ-S-571, J-STD-006A, JIS Z 3282). A range of wire diameters is available manufactured to close dimensional tolerances. Flux: 370 solid flux is based on modified rosin and carefully selected activators. In practice they exhibit a mild rosin odor and leave a small quantity of amber residue. Multicore 370 is available as 3 core (2% flux), and 5 core (3% flux) solder wire. 370 Flux Properties Acid Value, mg KOH/g 164-176 Halide Content, % QQ-S-571E - Solder Spread - Solder Pool - Water Extract Resistivity >90% Pass 87000 DIN 8516 - Area of Spread - Corrosio