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| Family | Principal alloying element | UNS numbers |
| Copper alloys, Brass | Zinc (Zc) | C1XXXX – C4XXXX, C66400 – C69800 |
| Phosphor bronze | Tin (Sn) | C5XXXX |
| Aluminum bronzes | Aluminum (Al) | C60600 – C64200 |
| Silicon bronzes | Silicon (Si) | C64700 – C66100 |
| Copper nickel, nickel silvers | Nickel (Ni) | C7XXXX |
For purposes of identification, copper and copper alloys are divided into characteristic groups, each group determined by its composition, and referenced by a system of three-digit numbers originally designated by the Copper Development Association, or CDA. Today, these designations have been expanded to five digits, following a prefix letter ‘C’, and made a part of the Unified Numbering System for Metals and Alloys (UNS), which is jointly managed by the American Society for Testing and Materials (ASTM) and by the Society of Automotive Engineers (SAE).
100 Series (C10000) Coppers
This group comprises the pure coppers, those with a designated minimum copper content of 99.3%, for high electrical conductivity.Also included within this group are the high copper alloys, those withcopper contents of between 99.3% and 96%; which contain additionalalloying elements such as beryllium, cadmium,chromium, cobalt, nickel, or iron forgreater strength without drastically reducing the electrical conductivity.
200 Series (C20000) Brasses
These are the basic copper-zinc alloys which feature ease of manufacturing while still maintaining fair electrical characteristics. These alloys are excellent for drawing and forming while still providing good strength.
300 Series (C30000) Leaded Brasses
These are basically brass alloys that contain an addition of 1 to 3% lead to provide greater ease of machining, blanking, shearing, sawing, and milling.
400 Series (C40000) Tin Brasses
These alloys contain 1 to 2% of tin as well as copper and zinc to provide greater corrosion resistance while maintaining strength. These alloys find many uses in electrical applications such as contact springs, fuse clips, terminals, and connectors.
500 Series (C50000) Phosphor Bronzes
These alloys feature greater resistance to alternating or cyclic stress as required in applications for springs, diaphragms, bellows, and contacts. This series also includes the leaded phosphor bronzes which provide better performance under load conditions found in sleeve bushings, bearings, thrust washers, and engine and drive train applications.
600 Series (C60000) Bronzes
This series of alloys includes the aluminum bronzes, which contain 2 to3% of aluminum for strength while maintaining formability. These alloys are often used for wear plates, bushings, bearings, and hydraulic valve parts. Also included in this group are the silicon bronzes which are suitable for all types of welding in addition to having good hot-forming and cold-working properties. Other miscellaneous copper-zinc alloys are also included within this classification series.
700 Series (C70000) Nickel Silvers These special alloys composed of copper, nickel, and sometimes lead, have high strength and increased resistance to corrosion along with good formability
ASME SB 466 SB 111 C70600 | EEMUA 234 UNS 7060X Standard Specification:ASME SB466 Specification for Seamless Copper-Nickel Pipe and Tube
ASTM B111 Standard Specification for Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock
BS 2871-2 Specification for copper and copper alloys. Tubes. Part 2: Tubes for general purposes
GB/T8890 Seamless Copper Alloy Heat Exchanger Tubes
JIS H3300 Copper and Copper Alloy-Seamless Pipes and Tubes
EEMUA 144 Specifications covering 90-10 Cu-Ni Piping for Offshore Applications are : Tubes Seamless and Welded Publication
EEMUA 234 UNS 7060X – 90/10 Copper nickel alloy piping for offshore applications (Incorporating EEMUA 144, 145 and 146)
DIN1785 Wrought Copper and Copper Alloy Tubes for Condensers and Heat Exchangers
DIN 86019 Seamless Tubes Made of CuNi10Fe1.6Mn for Pipes – Dimensions for Standard Tubes and Precision Tubes
Copper Nickel Pancake Coil tubes are widely used for Automobile Brake Line System
| Alloy Number | Shape | OD | Wall |
| C70600 | Seamless Tube | 3mm to 70mm | 0.2mm to 5mm |
| CuNi10Fe1Mn | Seamless Tube | 3mm to 70mm | 0.2mm to 5mm |
| C71500 | Seamless Tube | 3mm to 70mm | 0.2mm to 5mm |
| CuNi30Mn1Fe | Seamless Tube | 3mm to 70mm | 0.2mm to 5mm |
| C70400 | Seamless Tube | 3mm to 70mm | 0.2mm to 5mm |
| C70600 Pancake Coil | Seamless Tube | 3mm to 70mm | 0.2mm to 5mm |
Comparison table of International Standard Specifications for CuNi 90/10 C70600
| DIN 86019 CuNi10Fe1.6Mn 2.1972 | EEMUA 234 UNS 7060X | BS 2871 CN 102 | ASTM B466 C70600 | JIS H 3300 C7060 | MIL-T-16420K C70600 | |
| Ni% | 9.0-11.0 | 10.0-11.0 | 10.0-11.0 | 9.0-11.0 | 9.0-11.0 | 9.0-11.0 |
| Fe% | 1.5-1.8 | 1.5-2.0 | 1.0-2.0 | 1.0-1.8 | 1.0-1.8 | 1.0-1.8 |
| Mn% | 0.5-1.0 | 0.5-1.0 | 0.5-1.0 | Max.1.0 | 0.2-1.0 | Max1.0 |
| C% | Max.0.05 | Max.0.05 | Max.0.05 | Max.0.05 | Max.0.05 | |
| Pb% | Max.0.03 | Max.0.01 | Max.0.01 | Max.0.02 | Max.0.05 | Max.0.02 |
| S% | Max.0.015 | Max.0.02 | Max.0.05 | Max.0.02 | Max.0.02 | |
| P% | Max.0.02 | Max.0.02 | Max.0.02 | Max.0.02 | ||
| Zn% | Max.0.15 | Max.0.20 | Max.0.50 | Max.0.50 | Max.0.05 | |
| Zr% | Max.0.03 | |||||
| Others | Max.0.30 | Max.0.30 | Max.0.30 | |||
| Cu% | Balance | Balance | Balance | Balance | Cu+Ni +Fe+Mn Min.99.5 | Min.86.5 |
| Grade | USA | U.K | Germany | Japan |
| China BG | ASTM | BS | DIN | JIS H |
| BFe10-1-1 | C70600 | CN102 | CuNi10Fe1Mn | C7060 |
| BFe30-1-1 | C71500 | CN107 | CuNi30Mn1Fe | C7150 |
| BFe30-2-2 | C71640 | CN108 | CuNi30Fe2Mn2 | C7164 |
| BFe5-1.5-0.5 | C70400 | – | – | – |