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Copper Nickel 70/30 Tube

Copper Nickel 70/30 tube specifications What is a copper nickel 70/30 tube?

Applications requiring enhanced strength and corrosion resistance turn to this tubing, comprising copper (70%) and nickel (30%). The prime differentiator in a copper nickel 70/30 tube over other similar tubing is the addition of iron and manganese. These elements boost its strength and resilience in seawater and can handle greater water velocities.

Copper Nickel 70/30 seamless tube stockists in Mumbai

Can a copper nickel 70/30 tube be welded?

A Cu-Ni 70/30 welded tube is straightforward to weld and fabricate per customer needs. It does not involve any particular considerations. Besides soldering and brazing, it offers an excellent response to arc welding (gas-shielded or coated metal) and spot welding. A copper nickel 70/30 evaporator tube can also be seam or butt welded.


Specification of copper nickel 70/30 tube

Schedule End Types
SCH20, SCh30, SCh20, SCH80, STD, XS, SCH60, SCH120, SCH80, SCH140, XXS, SCH160 Plain end, treaded, beveled end Seamless / welded / ERW
Specifications Size Wall Thickness
ASTM / ASME SB 111 / 151 / 466 1/2" - 6" OD 0.15mm - 1.50 mm

Manifest Alloys is a trusted supplier of WNR 2.0882 seamless tubes and Copper Nickel C71500 Tube for marine sector and offshore industries

What makes a copper nickel 70/30 tube suitable for marine environments?

This tubing is excellent for marine applications due to its brilliant erosion and pitting resistance. It can operate in polluted and fast-moving waters. These properties make a cu ni 70/30 annealed tube favoured for aqua fittings, valves, propeller sleeves, and pumps.

Types of cuni 70/30 tube


Copper nickel 70/30 round tube

Copper nickel 70/30 round tube

Wnr 2.0882 welded tubing

Wnr 2.0882 welded tubing

 C71500 ERW tube

C71500 ERW tube

Cu-ni 70/30 Seamless Tubes

Cu-ni 70/30 Seamless Tubes

Positive Material Identification (PMI) is an important testing method for ensuring compliance with industry standards by verifying the composition of ASTM B111 Tubes and C71500 Industrial Tube

How is a copper nickel 70/30 evaporator tube tested for quality?

The standard testing procedures for these tubes are drift tests, hydraulic tests, and microstructure analysis to confirm the properties. Some manufacturers may also perform an Eddy Current test on ASTM B111 cuni 70/30 tubes. Further examination, such as a third-party inspection, depends on client requirements.

Chemical composition of cunifer 70-30 seamless tubing


Grade Mn Cu Pb Fe Ni Zn
70/30 1 max 65.0 min 0.5 max 0.4-1.0 29-33 1 max
The addition of nickel to the alloy increases strength and toughness, making Copper Nickel 70/30 Evaporator Tube a long-lasting choice for demanding industrial applications, see Copper Nickel 70/30 Tubing properties

What are the properties of a copper nickel 70/30 tube?

An impressive property of a cuni 70/30 seamless tube is strength and resilience in marine environments. The hardness ranges from 80 to 120, while the tensile strength is 310 Mpa. Natural protection against impingement attacks and biofouling or microbial growth makes it a safe choice for sanitary settings. The thermal stability of cunifer 70/30 tubing makes it useful for heat exchangers, condensers, and boilers. It also supports welding and fabrication.

A WNR 2.0882 tube conforms to the German Institute for Standardization guidelines, where WNR refers to Werkstoff.

Mechanical properties of CUNI 70/30 welded tube


Grade Melting point Density Tensilestrength Elongation Yieldstrength(0.2%Offset)
70/30 2260°F 0.323 lb/in3 at 68°F 50000 PSi 30% 20000PSi
We use a price table to ensure the price of our WNR 2.0882 tube and ASME SB466 Cu-Ni 70/30 Seamless Tubes

What is the price of a copper nickel 70/30 tube?

The price can range from Rs 650 to Rs 1,000 apiece for tubes measuring 1/4" to 24". Buyers must specify the dimensions for the diameter, length, and wall thickness of a cuni 70/30 heat exchanger tube.

Equivalent grade of cupro nickel 70-30 ERW tube


Grade UNS Werkstoff Nr.
70/30 C71500 2.0882