QBE2
1 source records. Standards, editions and conditions are presented separately; matching grade names do not establish interchangeability.
Refer to each source for mass fractions and analysis type. Missing values are not treated as 0. Manufacturer typical values, standard guarantees and measured heat results must remain separate. Use the material selector for calculations and condition selection.
Open condition selection, comparison and carbon-equivalent tools for QBE2 →QBe2 · GB/T 5231-2001
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Copper and copper alloys
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 5231-2001
- Table / clause
- Table 3 and footnotes
- PDF page references
- 1、3、4、5、6、7、8、9、10、11、12、13、14
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| Al | ≤ 0.15 (lower limit not stated) |
| Be | 1.8 ～ 2.1 |
| Si | ≤ 0.15 (lower limit not stated) |
| Ni | 0.2 ～ 0.5 |
| Fe | ≤ 0.15 (lower limit not stated) |
| Pb | ≤ 0.005 (lower limit not stated) |
Applicability and limitations
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, except for QFe2.5 with an explicit Cu minimum and QTe0.5 with a minimum combined Cu+Te+Sn. Note 1: As/Sb/Bi need not be analyzed, but the supplier must guarantee that the specified limits are not exceeded. Total impurities ≤.5%; major alloying elements are not simply added together.
Combined limits
- Combined-element limits
- Elements requiring measured values from the same heat