Overview
Copper nickel C70600 offers excellent corrosion resistance, especially in marine salt water environments. The main, wrought copper-nickel alloys chosen for sea water service contain 10 or 30 percent nickel. They also have important additions of iron and manganese which are necessary to maintain good corrosion resistance.
Copper Nickel C70600 is also known as Copper Nickel 90/10 because it is made up of 10% nickel or as ASTM B111 and ASME SB111. What's more, C70600 has the moderate strength, weldability, and formability. The inclusion of controlled quantities of iron and manganese also give the 90/10 alloy an extraordinary resistance to general corrosion and stress cracking, as well as to erosion and impingement due to turbulent water containing air bubbles and silt flowing at high velocities.
Specification
ASTM B111/B111M Standard Specification for Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock.
| UNS No. | C70600 – BSI No. CN102 – ISO Name CuNi10Fe1Mn |
| Chemical Comp. (%) | Cu rem / Ni 9 ~ 11 / Pb 0.05 / Fe 1 ~ 1.8 / Zn 1 max / Mg 1 max |
| ASTM Spec. | B 111, B 395, B 466, B 552 |
| ASME Spec. | SB 111, SB 395, SB 466 |
| Applications | Condenser, Evaporator and Heat Exchanger tubes; Distiller tubing; Salt Water piping. |
| Temper | O61 Annealed / H55 Light-Drawn |
Chemical Composition
| Elements | ||||||
| Cu | Pb | Zn | Fe | Ni | Mn | |
| Min (%) | 1.0 | 9.0 | ||||
| Max (%) | Rem | 0.05 | 1.0 | 1.8 | 11.0 | 1.0 |
Mechanical Properties
| Form | Temper | Tensile Strength (ksi) | YS-0.2% Offset (ksi) | YS-0.5% Ext (ksi) | Elongation (%) | Rockwell B scale | Rockwell F scale | Rockwell 30T scale |
| Bar | Hard | 50 Typ | 25 Typ | 15 Typ | ||||
| Soft Anneal | 38 Min | 15 Typ | 30 Typ | |||||
| Flat Products | 1/4 Hard | 53 Typ | 16 Typ | 35 Typ | 60 Typ | |||
| As Hot Rolled | 40 Min for Standard | 15 Typ | 30 Min for Standard | 3 Min for Standard | ||||
| Hard | 75 Typ | 73 Typ | 5 Typ | 80 Typ | ||||
| Tube | Annealed | 44 Typ | 16 Typ | 42 Typ | 15 Typ | 65 Typ | 26 Typ | |
| Light Drawn, Light Cold Rolled | 45 Min for Standard | 10 Typ | 72 Typ | 100 Typ | 70 Typ |
Applications
1. Underwater tubing
2. Exchangers
3. Marine hardware
