Machinery's Handbook, 31st Edition
524
Wrought CopperS AND COPPER Alloys Table 3. Properties and Applications of Wrought Coppers and Copper Alloys Table 3. (Continued) Properties and Applications of Wrought
Strength (ksi) Elonga tion in 2 in. (%) Tensile Yield
Nominal Composi tion (%) 88.6 Cu, 1.4 Fe, 10.0 Ni
Machin ability Rating a
Name and Number
Fabricating Characteristics and Typical Applications
Good hot and cold workability. Fabricated by forming and bending, welding. Uses: condensers, condenser plates, distiller tubing, evaporator and heat-exchanger tubing, ferrules. Good hot and cold formability. Fabricated by blanking, forming and bending, welding. Uses: communication relays, condensers, condenser plates, electrical springs, evaporator and heat-exchanger tubes, ferrules, resistors.
C70600 Copper nickel, 10%
44-60 16-57 42
20
C71000 Copper nickel, 20%
79.0 Cu, 21.0 Ni
49-95 13-85 40
20
69.5 Cu, 30.0 Ni, 0.5 Fe 82.2 Cu, 16.5 Ni, 0.8 Fe, 0.5 Cr
C71500 Copper nickel, 30%
54-75 20-70 45
20 Similar to C70600.
Good hot and cold formability. Fabricated by forming, bending, and welding. Uses: condenser tubing, heat-exchanger tubing, saltwater piping. Excellent cold and hot formability. Fabricated by blanking, brazing, coining, drawing, etching, forming and bending, heading and upsetting, roll threading and knurling, shearing, spinning, squeezing, stamping, and swaging. Uses: relay and switch springs, connectors, brazing alloy, lead frames, control and sensing bellows. Fabricating characteristics same as C74500. Uses: hollow ware, medallions, jewelry, base for silverplate, cosmetic cases, musical instruments, name plates, contacts. Excellent cold workability. Fabricated by blanking, drawing, etching, forming and bending, heading and upsetting, roll threading and knurling, shearing, spinning, squeezing, and swaging. Uses: rivets, screws, slide fasteners, optical parts, etching stock, hollow ware, nameplates, platers’ bars. Fabricating characteristics similar to C74500. Uses: rivets, screws, table flatware, truss wire, zippers, bows, camera parts, core bars, temples, base for silverplate, costume jewelry, etching stock, hollow ware, nameplates, radio dials. Fabricating characteristics similar to C74500. Uses: camera parts, optical equipment, etching stock, jewelry. Fabricating characteristics similar to C74500. Uses: slide fasteners, camera parts, optical parts, etching stock, name plates. Fabricated by machining, roll threading, and knurling. Uses: hardware, fasteners, connectors for electronic applications. Good cold workability. Fabricated by blanking, forming and bending, and shearing. Uses: optical goods, springs, and resistance wire. Good cold formability. Fabricated by blanking, milling, and drilling. Uses: key blanks, watch plates, watch parts.
C72200
46-70 18-66 46
88.2 Cu, 9.5 Ni, 2.3 Sn
C72500
55-120 22- 108
35
20
72.0 Cu, 10.0 Zn, 18.0 Ni
C73500
50-100 15-84 37
20
65.0 Cu, 25.0 Zn, 10.0 Ni
C74500 Nickel silver, 65-10
49-130 18-76 50
20
65.0 Cu, 17.0 Zn, 18.0 Ni 65.0 Cu, 20.0 Zn, 15.0 Ni 65.0 Cu, 23.0 Zn, 12.0 Ni 61 Cu, 13 Zn, 24.5 Ni, 1 Pb, 0.5 Sn 55.0 Cu, 27.0 Zn, 18.0 Ni 65.0 Cu, 2.0 Pb, 25.0 Zn, 8.0 Ni
C75200 Nickel silver, 65-18
56-103 25-90 45
20
C75400 Nickel silver, 65-15 C75700 Nickel silver, 65-12
53-92 18-79 43
20
52-93 18-79 48
20
C76390
90
85
6
40
C77000 Nickel silver, 55-18
60-145 27-90 40
30
C78200
53-91 23-76 40
60
a Free-cutting brass = 100. Source: Copper Development Association, New York.
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