BZN25-18
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 BZN25-18 →BZn25-18 · GB/T 5231-2012
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 5231-2012
- Table / clause
- Table 5, row 31, designation T76500
- PDF page references
- 12
- Unit
- Mass fraction (wt%)
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| Fe | ≤ 0.3 (lower limit not stated) |
| Mn | ≤ 0.5 (lower limit not stated) |
| Pb | ≤ 0.03 (lower limit not stated) |
| Al | ≤ 0.005 (lower limit not stated) |
| Si | ≤ 0.15 (lower limit not stated) |
| P | ≤ 0.005 (lower limit not stated) |
| S | ≤ 0.005 (lower limit not stated) |
| C | ≤ 0.03 (lower limit not stated) |
| Sn | ≤ 0.08 (lower limit not stated) |
| Bi | ≤ 0.002 (lower limit not stated) |
| Ti | ≤ 0.005 (lower limit not stated) |
| Sb | ≤ 0.002 (lower limit not stated) |
| Cu | 56.0 ～ 59.0 |
Applicability and limitations
Mass fraction wt%; GB/T 5231-2012, Table 5, row 31, designation T76500; scanned PDF, PDF physical page 12. Cu follows the table range, and Zn 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 ≤0.8%, 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. Note d to Table 5: total impurities means the sum of measured values for the impurity elements listed in the table. Note a to Table 5: analysis of Bi, Sb and As may be omitted, but the supplier must ensure that their contents do not exceed the limits.
Combined limits
- Combined-element limits
- Requirement
- Table 5: Ni+Co total
- Element coefficient
- Ni
- 1
- Co
- 1
- Lower limit
- 23.5
- Upper limit
- 26.5
- Elements requiring measured values from the same heat
- Ni
- Co