MRC:
The element(s) used in the fabrication of the item,expressed in percent.ARRX
Chemical Composition Percentage:
Tin 51.5 pct, lead 47.535 pct, antimony 0.5 pct, bismuth 0.25 pct, copper 0.08 pct, other elements 0.08 pct, arsenic 0.025 pct, iron 0.02 pct, aluminum 0.005 pct, zinc 0.005 pct
MRC:
The number,letter,or symbol that indicates the type,style,grade,class,and the like,of an item in a nonidentifying specification or standard.ZZZT
Specification Or Standard:
Sn50 composition and w form and rflux type and core condition & flux pct p2