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70/30 is a 70% copper, 30% nickel alloy with additions of iron and manganese. These elemental additions make it somewhat more resistant to corrosion and erosion and with slightly improved strength level than 90/10, making it suitable for more demanding applications. In particular, its corrosion resistance is notably improved in high-velocity waters (up to 4.5m/s) and polluted seawater.

70/30 is readily cold worked, fabricated and welded without any special material considerations. The most popular specifications covering this alloy are the CN107 and C71500 designations, although the Defence Standard DEF STAN 02-879 Annex B (superseding DEF STAN 02-780 and NES 780) offers tighter controls on impurities and mechanical properties together with a mandatory impact value.

70/30 Cupro Nickel
Cupro Nickel 70/30 flanges

Equivalent Grades of Cupro Nickel 70/30

STANDARD WERKSTOFF NR. UNS
Cu-Ni 70/30 2.0882 C71500

Chemical Properties of 70/30 Cupro Nickel

Grade Cu Mn Pb Ni Fe Zn
Cu-Ni 70/30 65.0 min 1.0 max 0.05 max 29-33 max 0.4 – 1.0 1 max

Mechanical Properties of Copper Nickel 70/30

Grade Density Tensile Strength ksi (min) Yield Strength 0.2% ksi (min) Elongation %
Cu-Ni 70/30 0.323 lb/in3 at 68 F 50000 psi 20000 psi 30

UNS C71500 Updated Price List

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Stockist of Cupro Nickel 70/30

We maintain a large inventory of Cupro Nickel in all standard sizes and grades. Please send us your requirement and we will send you the availability with the best quote for DIN 2.0882.

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How to Buy Cupro Nickel 70/30

K. K. Industries is a leading manufacturer, stockist, and supplier of Cupro Nickel 70/30 from India. We maintain a large stock and you can easily buy 70/30 copper nickel and other forms of Cupro-Nickel at the best price. Please use the send your enquiry button or click here to send us your complete requirement to Buy Cupro Nickel 70/30 from K.K Industries.

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