DURATOOL SPC22132. 焊锡丝, 63/37 锡/铅, 1磅
The is a 63/37 grade Solder Wire, made of Sn/Pb alloy. Rosin activated flux is a high activity core flux designed for excellent instant wetting action, even on nickel surfaces. Although it is a RA-based material, the residues are non-corrosive if not cleaned. As per J-STD-004 it is classified as ROM1 flux.
The Water Soluble Solder has a flux within that must be cleaned therefore, the Flux Extract Softening Point Test does not apply. Acid Number test is based upon the IPC-TM-650 test method.