Silver Tubes is one of the prominent supplier & exporter for high quality of Cupro Nickel 70 / 30 Pipes & Tubes, which is a copper-nickel alloy with an alpha phase structure. Small amounts of iron and manganese in Cu-Ni 70 / 30 Tubes are added to improve corrosion resistance in high-velocity waters, including polluted seawater. Copper Nickel 70 / 30 Pipes is almost insensitive to stress corrosion. CuNi 70 / 30 Tubes retain its strength well at moderately elevated temperatures, have good cold- and hot-working properties and are readily weldable. Cupronickel 70 / 30 Pipes are a steel of copper that also contains nickel and solidification elements, like iron & manganese. Due to the specific properties of nickel and copper alloys, Cupronickel 70 / 30 Tubes are applied in various domains of industry.
Cu-Ni 70 / 30 Seamless Pipes are often used in mint industry, armaments industry, desalination industry, marine engineering, and also extensively used in the chemical, petrochemical and electrical industries. Cu-Ni 70 / 30 Seamless Tubes is highly resistant to corrosion in seawater because its electrode potential is adjusted to be neutral with regard to seawater. Copper Nickel 70 / 30 EFW Pipes are as well used for piping, condensers and heat exchangers in marine hardware, seawater systems, and at times for crankshafts, propellers and hulls of best fishing boats, tugboats, and other functioning boats. Another common use of Copper Nickel 70 / 30 ERW Tubes is in silver-coloured modern-circulated coins.
| Specifications | ASTM / ASME SB 111/466/467/552 |
| Pipe Size | 1/2" To 6' in OD & NB in various SWG & SCH |
| Tube Size | 1 mm OD upto 254 mm OD in 0.2 TO 20 mm thickness. |
| Type | Seamless / ERW / Welded / EFW / Fabricated / CDW |
| Length | Single Random, Double Random & Required Length. |
| End | Plain End, Beveled End, Treaded |
| STANDARD | UNS | WERKSTOFF NR. |
| Copper Nickel 70/30 | C71500 | 2.0882 |
| Grade | Cu | Mn | Pb | Ni | Fe | Zn |
| Cu-Ni 70-30 | 65.0 min | 1.00 max | 0.5 max | 29-33 max | 0.4-1.0 | 1.00 max |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Cupro Nickel 70-30 | 0.323 lb/in3 at 68 F | 2260 F | 50000 psi | 90-1000 psi | 30 % |

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