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Oxygen-Free Copper (OFC) Products
Lester Metals offers premium oxygen-free (99.99% Pure) copper products (also referred to as OFC) including foil, sheet, plate and bar in grades C10100 and C10200. The thickness or gauge of the material is what determines whether is is called foil, sheet or plate. Oxygen-free copper foil material thickness ranges from .0005" to .0079". Oxygen-free copper sheet material thickness ranges from .010" to .0125". Oxygen-free copper plate and bar material thickness ranges from .125" to 5.00".
We offer high quality and fast shipping on both large and small quantities for many applications including electrical, manufacturing and research and development.
OFC Products
About Oxygen-Free Copper
C10100 - also known as Oxygen-Free Electronic or OFE . This is a 99.99% pure copper with 0.0005% oxygen content. It achieves a minimum 101% IACS conductivity rating. This copper is finished to a final form in a carefully regulated, oxygen-free environment. Silver (Ag) is considered an impurity in the OFE chemical specification. This is the more expensive of the two grades we offer.
C10200 - also known as Oxygen-Free (OF). While OF is considered oxygen-free, its conductivity rating is no better than the more common ETP grade below. It has a 0.001% oxygen content, 99.95% purity and minimum 100% IACS conductivity. For the purposes of purity percentage, silver (Ag) content is counted as copper (Cu).