T2

Mass fraction wt%; Under 2.2, elements with specified lower and upper limits are alloying constituents; a single value is a minimum for copper and a maximum for other elements. A dash means unspecified; it is not entered as zero; Cu+Ag and Ni+Co are subject to combined ranges and are not converted into independent element ranges. The balance remains a balance; subtracting independent maxima does not establish a guaranteed range. Total impurities include all relevant impurities; The sum of listed elements is only a necessary condition and cannot replace complete impurity analysis. Product forms in the original document define the applicable wrought-product scope; they do not establish confirmed supply of cold-heading wire or final properties. Table 1, note 2: As/Sb/Bi need not be analyzed, but the supplier must guarantee that the limit is not exceeded.

Mass fraction wt%; GB/T 5231-2012, Table 1, row 14, designation T11050; original scan PDF page 5 (printed page 2). A dash indicates that the value is unspecified and shall not be treated as zero; The combined lower limit shall not be split into independent lower limits for each element. Standard Clause 2.2: Impurities listed as a single value in the table are maximum limits; Limits for elements not listed cannot be supplemented as zero by referring to other versions. Table 1 Note a: As, Bi, and Sb may not be analyzed, but the supplier must guarantee that they do not exceed the upper limits listed in the table. This standard only specifies the grades and chemical compositions of wrought copper and copper alloys; actual supply of cold heading wire shall not be inferred therefrom. Table 1 Note e: by negotiation between both parties, conductive T2 copper with P≤0.001% may be supplied; This is an agreed condition and shall not serve as the general T2 default upper limit. Table 1 Note f: pure copper wire rods for electric locomotive contact materials must satisfy Bi≤0.0005%, Pb≤0.0050%, O≤0.035%, P≤0.001%, and total other impurities ≤0.03%; Applicable to this use only.