Brass Discs Type C260 ASTM-B16 are useful wherever pre-cut, circular pieces of metal are needed. As base pieces, tubing ends, cams, gear blanks, spool ends, flywheels, hand wheels or eccentrics. They may be machined, drilled, hard or soft soldered and readily plated. Brass C260 is 70 percent copper 30 percent zinc. This is one of the most widely used of the copper-zinc alloys; it is malleable and ductile; has excellent cold-working; poor hot working and poor machining properties; develops high tensile strength with cold-working. Temper is impaired by cold rolling and classified in hardness by the number of B & S Gages of rolling (reduction in thickness) from the previous annealing gage. Rated excellent for soft-soldering; good for silver alloy brazing or oxyacetylene welding and fair for resistance of carbon arc welding.