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Copper Temper Designation Codes

ASTM B601 Temper Designation Codes for Copper and Copper Alloys

Copper and copper alloys constitute one of the major groups of commercial metals. They are widely used because of their excellent electrical and thermal conductivities, outstanding corrosion resistance, and ease of fabrication. They are generally nonmagnetic and can be readily joined by conventional soldering, brazing, and welding processes (gas and resistance).

a = Cold-worked tempers to meet standard requirements based on cold rolling or cold drawing.
b = Cold-worked tempers to meet standard requirements based on temper names applicable to specific products.
c = Tempers produced by controlled amounts of cold work followed by a thermal treatment to produce order strengthening.
d = Annealed to meet mechanical properties.
e = Annealed to meet nominal average grain size.
f = Tempers of fully finished tubing that has been drawn or annealed to produce specified mechanical properties or that has been annealed to produce a prescribed nominal average grain size are commonly identified by the property
H, O, or OS temper designation.

Sources:

ASTM B601

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