Copper-Nickel Alloy Product Forms


Typical Forms and Sizes

90-10 and 70-30 copper-nickels are available in a wide selection of product forms. Common production limits on the sizes of these materials are shown below. This is a guide to what is commonly made to order. It may also be possible to make material outside these sizes by arrangement with the supplier.

MetricUS Customary
Plate up to 3000 mm wide, 10 to 150 mm thick up to 10ft wide, to 6" thick
Clad steel plate to order only to order only
Sheet & Strip up to 2000 mm wide, 0.2 to 10 mm thick up to 6ft wide, 0.008" to 0.25" thick
Seamless Tubes:
  • Pipeline
6 to 420 mm OD, 0.8 to 5.0 mm wall thickness 0.3" to 16" mm OD, 0.03 to 0.2" wall thickness
  • Condenser
8 to 35 mm OD, 0.75 to 2.0 mm wall thickness 0.3 to 1.5" OD, 0.03 to 0.1" wall thickness
  • Coiled
6 to 22 mm OD, 0.5 to 3 mm wall thickness 0.25 to 1" OD, 0.02 to 0.12" wall thickness
Tubes - longitudinally welded 270 to 1600 mm OD, 2.0 to 10 mm wall thickness 10 to 63" OD, 0.1 to 0.5" wall thickness
Fabrications by arrangement by arrangement
Wire all common wire and wire mesh sizes all common wire and wire mesh sizes
Rod & Section all common sections up to 180 mm diameter all common sections up to 7" diameter
Welding Consumables all common sizes all common sizes
66-30-2-2 Cu-Ni is normally available as seamless tubing only.


Copper-Nickel fittings are not standardized in EN, ISO for the metric sizes. Therefore, in practice, EEMUA and DIN standards are the common standards used by customers worldwide. Also, DIN standards for shipbuilding have not been replaced by EN or ISO.

Read more about fittings in seawater system design.

Copper-nickel formsCopper-nickel forms.
Press-fitted copper-nickel pipePress-fitted copper-nickel pipe.

Product Supplier's List

Find Product Suppliers by specifying alloys and forms they carry.


In many engineering situations, copper-nickel systems have cast valves and pumps in nickel aluminum bronze. However, satisfactory complex castings can be made with copper-nickel alloys, provided that foundry practices are good. The 90-10 composition has a lower melting and pouring temperature than the 70-30 alloy. Normally, extra alloying elements are added to improve properties.

The introduction of electric furnace melting in foundries led to enhanced interest in cast 70-30 alloys, particularly the alloy containing around 2% Cr. The UK Navy developed such an alloy as Defense Standard 02-824 Part 1. This alloy has improved resistance to impingement corrosion. For other cast alloys and their designations, see: Copper-Nickel-Alloys: Properties, Processing, Applications.

Since these alloys have tight limits on impurities, only certified ingots are used. Electric melting practices attain the correct melting temperature within a reasonable time and provide cleaner furnace atmospheres that avoid contamination and gas pick-up. They are only available from specialty castings suppliers.

Product Standards

The table below covers American (ASTM), European (EN - replaces all previous national standards) and International Standards (ISO).

StandardsApplicable Standard Numbers
ASTM 122
122 122 111
EN 1652
12163 12420 1982
ISO 429 1634 1634 1634 1635,
1637 1639 1638 1640
‡ 70-30 alloy only
§ 90-10 alloy only