C23000 Red Brass ASTM B134, ASTM B135, ASTM B43 Most durable of all metals for commercial water pipe in the practical price range. Excellent for its resistance to dezincification and season cracking for which the high copper brasses are known. Moderate strength and good retention of spring properties. Specified for underground service lines since it offers greatest corrosion resistance to all types of potable waters. Applications include costume jewelry, fire hose couplings, zippers, condenser and heat exchanger tubes. Popular as an outdoor metal and has found for itself a very important place in modern acrchitecture. Also known as Nordic Brass.