ASTM B49-20

Annotation of standard text ASTM B49-20 :

This specification covers the requirements for rod drawing stock produced from electrolytic tough-pitch or oxygen-free coppers and is suitable for further fabrication into electrical conductors. The rod shall be fabricated from copper of such quality and purity. Copper of special qualities, forms, or types, as agreed upon between the manufacturer and the purchaser and that will conform to the requirements prescribed in this specification may also be used. The specimen shall have the following chemical composition: tellurium, selenium, bismuth, antimony, arsenic, tin, lead, iron, nickel, sulfur, silver, oxygen, cadmium, phosphorus, zinc, and manganese. Embrittlement test shall be performed on the specimen to reflect propensity towards hydrogen embrittlement and shall be performed only on oxygen-free copper. The rod shall be free of defects, but blemishes of a nature that do not interfere with the intended application are acceptable.


Keywords:
cathode, copper rod, electrical conductors, electrolytic tough-pitch copper, fire-refined high conductivity copper, oxygen-free copper, rapid elongation tensile test, scrap, shaving, subsurface oxides, uniform surface oxides,, ICS Number Code 29.050 (Superconductivity and conducting materials)