B5 (copper alloy)

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. Cu is the balance. Note 1: Bi/As/Sb need not be analyzed; the supplier guarantees that the limit is not exceeded.

Composition, mass fractions wt%; A single value is a maximum; ranges are retained as in the original table. ; The balance is not converted into a fixed numerical value or treated as zero; Unlisted elements are not treated as zero. ; Steel IIW/Pcm/CET carbon-equivalent formulas are not directly applied to copper or copper alloys. ; The total Ni+Co is 4.4–5.0%, not a range for Ni alone.; Input of Ni or Co alone is insufficient to prove compliance with the total sum.. Total impurities ≤0.5%. ; GB/T5231—2012 Table 5: The combined Ni+Co range for B5 is 4.4–5.0%, with both endpoints included.; It is not 4.4–5.0% for Ni or Co individually.. Copper is the balance; do not invent a numerical value.; If Ni/Co is not entered, retain as unknown; do not treat as 0.. This record is based on the actual 2012 original text; it does not establish equivalence with other editions..

Composition, mass fractions wt%; A single value is a maximum; ranges are retained as in the original table. ; The balance is not converted into a fixed numerical value or treated as zero; Unlisted elements are not treated as zero. ; Steel IIW/Pcm/CET carbon-equivalent formulas are not directly applied to copper or copper alloys. ; The total Ni+Co is 4.4–5.0%, not a range for Ni alone.; Input of Ni or Co alone is insufficient to prove compliance with the total sum.. Total impurities ≤0.5%. ; GB/T5231—2012 Table 5: The combined Ni+Co range for B5 is 4.4–5.0%, with both endpoints included.; It is not 4.4–5.0% for Ni or Co individually.. Copper is the balance; do not invent a numerical value.; If Ni/Co is not entered, retain as unknown; do not treat as 0.. This record is based on the actual 2012 original text; it does not establish equivalence with other editions..

Composition, mass fractions wt%; A single value is a maximum; ranges are retained as in the original table. ; The balance is not converted into a fixed numerical value or treated as zero; Unlisted elements are not treated as zero. ; Steel IIW/Pcm/CET carbon-equivalent formulas are not directly applied to copper or copper alloys. ; The total Ni+Co is 4.4–5.0%, not a range for Ni alone.; Input of Ni or Co alone is insufficient to prove compliance with the total sum.. Total impurities ≤0.5%. ; GB/T5231—2012 Table 5: The combined Ni+Co range for B5 is 4.4–5.0%, with both endpoints included.; It is not 4.4–5.0% for Ni or Co individually.. Copper is the balance; do not invent a numerical value.; If Ni/Co is not entered, retain as unknown; do not treat as 0.. 2022 label records shall continue to be displayed according to the actual 2012 historical original text.

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. Cu is the balance. Note 1: Bi/As/Sb need not be analyzed; the supplier guarantees that the limit is not exceeded.

Mass fraction wt%; GB/T 5231-2012, Table 5, row 2, designation T70380; scanned PDF, PDF physical page 11. Cu is balance. Ni+Co is a combined range and must not be split into individual Ni or Co limits. Dashes mean unspecified and are not replaced with zero. Total table-listed impurities ≤0.5%, subject to the applicable table notes. This standard provides the grade-composition basis for wrought copper-nickel alloys; actual supply and cold-heading suitability require separate confirmation.

A match in the materials database does not establish suitability for cold heading or guarantee finished-product strength. Confirmation must consider wire condition, deformation, heat treatment and tests on actual parts.