Machinery's Handbook, 31st Edition
520
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 (%) 66.0 Cu, 2.0 Pb, 32.0 Zn 63.5 Cu, 0.5 Pb, 36 Zn 63.5 Cu, 1.0 Pb, 35.5 Zn 63.5 Cu, 2.0 Pb, 34.5 Zn 62.5 Cu, 1.1 Pb, 36.4 Zn 61.5 Cu, 2.8 Pb, 36.5 Zn 61.5 Cu, 2.5 Pb, 36 Zn 61.5 Cu, 3.1 Pb, 35.4 Zn 59.5 Cu, 0.5 Pb, 40.0 Zn 60.0 Cu, 1.0 Pb, 39.0 Zn 59.5 Cu, 2.0 Pb, 38.0 Zn 57.0 Cu, 3.0 Pb, 40.0 Zn
Machin ability Rating a
Name and Number
Fabricating Characteristics and Typical Applications
Excellent machinability. Fabricated by piercing, punching, and machining. Uses: general-purpose screw-machine parts. Similar to C33200. Commonly fabricated by blanking, drawing, machining, piercing and punching, stamping. Uses: butts, hinges, watch backs. Similar to C33200. Fabricated by blanking, heading and upsetting, machining, piercing and punching, roll threading and knurling, stamping. Uses: butts, gears, nuts, rivets, screws, dials, engravings, instrument plates. Combines excellent machinability with moderate cold workability. Uses: clock plates and nuts, clock and watch backs, gears, wheels and channel plate. Fair cold workability; poor hot formability. Uses: bearing cages, book dies, clock plates, gears, hinges, hose couplings, keys, lock parts, lock tumblers, meter parts, nuts, sink strainers, strike plates, templates, type characters, washers, wear plates.
C33200 High-leaded brass tube
47-75 15-60 50
80
C33500 Low-leaded brass
46-74 14-60 65
60
C34000 Medium-leaded brass
47-88 15-60 60
70
C34200 High-leaded brass
49-85 17-62 52
90
C35000 Medium-leaded brass
45-95 13-70 66
70
C35300 High-leaded brass C35600 Extra-high-leaded brass C36000 Free-cutting brass C36500 to C36800 Leaded Muntz metal
49-85 17-62 52
90 Similar to C34200.
Excellent machinability. Fabricated by blanking, machining, piercing and punching, stamping. Uses: clock plates and nuts, clock and watch backs, gears, wheels, and channel plate. Excellent machinability. Fabricated by machining, roll threading, and knurling. Uses: gears, pinions, automatic high-speed screw-machine parts.
47-97 17-87 60
100
49-68 18-45 53
100
54 (As hot rolled)
20
45
60 Combines good machinability with excellent hot formability. Uses: condenser-tube plates.
C37000 Free-cutting Muntz metal C37700 Forging brass
54-80 20-60 40
70 Fabricating characteristics similar to C36500 to 36800. Uses: automatic screw-machine parts.
Excellent hot workability. Fabricated by heading and upsetting, hot forging and pressing, hot heading and upsetting, machining. Uses: forgings and pressings of all kinds. Excellent machinability and hot workability. Fabricated by hot forging and pressing, forming, bending, and machining. Uses: architectural extrusions, store fronts, thresholds, trim, butts, hinges, lock bodies, and forgings. Excellent cold workability. Fabricated by blanking, forming, and drawing. Uses: meter clips, terminals, fuse clips, contact and relay springs, washers. Excellent cold workability. Fabricated by blanking, stamping, and shearing. Uses: electrical connectors. Excellent cold workability, good hot formability. Fabricated by blanking, forming and bending, drawing, piercing and punching, shearing, spinning, and stamping. Uses: bushings, bearing sleeves, thrust washers, flexible metal hose. Excellent cold workability; good hot formability. Uses: plater bar for jewelry products, flat springs for electrical switchgear.
52 (As ex truded) 60 (As ex truded)
20
45
80
C38500 Architectural bronze
20
30
90
95 Cu, 1 Sn, 4 Zn 95 Cu, 2 Sn, 3 Zn 91 Cu, 0.5 Sn, 8.5 Zn
C40500
39-78 12-70 49
20
C40800
42-79 13-75 43
20
C41100
39-106 11-72 43
20
90.0 Cu, 1.0 Sn, 9.0 Zn
C41300
41-105 12-82 45
20
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