Copper-Nickel flanges in 90/10 & 70/30 alloy grades, manufactured to standard and custom dimensions for marine and offshore piping systems.
Grades & Standards
Available grades and the manufacturing standards commonly applied to copper-nickel flanges.
Standards Explained
Technical Data
Nominal composition and typical mechanical properties for 90/10 & 70/30 Copper-Nickel flange stock, per ASTM B466 (base material referenced for ASME B16.24 manufacture).
Chemical Composition (% by weight)
| Grade | UNS No. | Cu | Ni (incl. Co) | Fe | Mn | Pb (max) |
|---|---|---|---|---|---|---|
| 90/10 Copper Nickel | C70600 | Remainder | 9.0 – 11.0 | 1.0 – 1.8 | 1.0 max | 0.05 |
| 70/30 Copper Nickel | C71500 | Remainder | 29.0 – 33.0 | 0.4 – 1.0 | 1.0 max | 0.05 |
Typical values per ASTM B466 Table 2. Mill test certificates issued per EN 10204 3.1 on request.
Mechanical Properties — 90/10 & 70/30 (Wrought)
| Property | Annealed | Half-Hard / Drawn |
|---|---|---|
| C70600 Tensile / Yield | 275 / 105 MPa | 310 / 205 MPa |
| C71500 Tensile / Yield | 372 / 140 MPa | 414 / 275 MPa |
| Elongation (both grades) | 30 – 35% | 18 – 20% |
| Density (both grades) | 8.94 g/cm³ | 8.94 g/cm³ |
Typical values; exact temper/casting method confirmed at enquiry stage.
Dimensions
Outside diameter, thickness, hub diameter & bolt circle for threaded cast copper alloy flanges, per ASME B16.24, Class 150. Class 300 available on request.
| NPS | Flange OD (in) | Thickness T (in) | Hub Dia. (in) | Bolt Circle (in) | No. of Bolts | Bolt Dia. (in) |
|---|---|---|---|---|---|---|
| 1/2" | 3-1/2 | 5/16 | 1-3/16 | 2-3/8 | 4 | 1/2 |
| 3/4" | 3-7/8 | 11/32 | 1-1/4 | 2-3/4 | 4 | 1/2 |
| 1" | 4-1/4 | 3/8 | 1-15/16 | 3-1/8 | 4 | 1/2 |
| 1-1/2" | 5 | 7/16 | 2-9/16 | 3-7/8 | 4 | 1/2 |
| 2" | 6 | 1/2 | 3-1/16 | 4-3/4 | 4 | 3/4 |
| 3" | 7-1/2 | 5/8 | 4-1/4 | 6 | 4 | 3/4 |
| 4" | 9 | 11/16 | 5-5/16 | 7-1/2 | 8 | 3/4 |
| 6" | 11 | 13/16 | 7-9/16 | 9-1/2 | 8 | 3/4 |
| 8" | 13-1/2 | 15/16 | 9-11/16 | 11-3/4 | 8 | 3/4 |
Dimensions per ASME B16.24, Class 150 threaded cast copper alloy flanges (bolt circle & bolting dimensions are shared with ASME B16.5 steel flanges for joint compatibility). Class 300 dimensions available on request.
Send us your drawings, sizes and standards — our team will get back to you with a detailed quotation for your Copper-Nickel, Copper, Brass or Bronze piping requirement.
