Lead-free solder wires should contain at least 2% flux by weight. leaded solders are available with lower flux percentages as low as 1% wt/wt; this low flux volume will not work well with lead-free. typical flux distribution in a solder wire, the density of the flux is close to 1 g/cc; therefore the volume is more obvious in the cross-section. Average weather in march in riyadh saudi arabia daily high temperatures increase by 8°f , from 78°f to 86°f , rarely falling below 68°f or exceeding 96°f . daily low temperatures increase by 8°f , from 57°f to 65°f , rarely falling below 49°f or exceeding 72°f . Krohne is a world-leading manufacturer and supplier of solutions in industrial process instrumentation. contact details in saudi arabia krohne is represented by krohne middle east. Shop solder & soldering supplies in the welding & soldering section of lowes. find quality solder & soldering supplies online or in store. skip to main content skip to main navigation do it right for less.