Beryllium Copper Strips & Sheets as per International Standards. These strips and sheets are made with ALLOY 25, UNS C17200, ASTM CDA 172, ASTM B196, 251, 463; SAE J461, 463; AMS 4533, 4534, 4535; AMS4650, 4651; RWMA Class 4, QBe2, BrB2, DIN 2.1247, CW101C to EN. ASTM: American Society for Testing and Materials SAE: Society of Automotive Engineers AMS: Aerospace Materials Specification (Published by SAE) RWMA: Resistance Welder Manufacturers’ Association.