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Copper-Bismuth and SeBiLOYS


(C89320 to C89940)—The copper-bismuth and selenium-bismuth (SeBiLOY) alloys are low-lead brass alloys that are used in food process and potable water applications. The three SeBiLOY alloys were developed to minimize lead leaching into potable water and to replicate the high machinability and pressure tightness of leaded brass. This is realized by substituting selenium and bismuth for lead. SeBiLoy I and II are red brasses, and SeBiLOY III is a yellow brass.


Bronzes Bronze is an imprecise term. It origi-


nally referred to alloys in which tin was the major alloying element. Under the UNS system, the term bronze (C86100


UNS Alloy Number Name


C81100 Copper


C82500 Beryllium copper


C83450 Leaded red brass


C83600 C83800


C84400 Leaded semi- red brass


C84800 C85200 Leaded


C85400 C85700


yellow brass 72 1 3 67 1 3 61 1 1


C86200 Mn bronze 64 C86300 C86400 C86500


62 58 58


C87200 Silicon bronze 92 C87500 Silicon brass 82


C90300 Tin bronze 88 10 C90500


88 8


C92200 Leaded tin bronze


C92300 C92600


1


24 29 37


0.3


26 3 4 3 Mn 25 3 6 4 Mn


14 2 4


88 6 1.5 4.5 87 8 1 87 10 1


C93200 High-leaded tin 83 7 7 C93500 Bronze C93700 C93800 C94300


C95200 Al bronze C95300 C95400 C95500 C95800


85 5 9 80 10 10 78 7 15 70 5 25 88 89 86 81


81.5 C96400 Cupronickel 30% 67


C97300 Leaded nickel 57 2 9 C97400 Silver C97600 C97800


60 3 5 64 4 4 66 5 2


*I-Izod C-Charpy 2010 Casting sourCe DireCtory


20 16 8 2


**endurance limit—100 million cycles Metal Casting Design & PurChasing 35


4 2 3 1


4 Si 4 Si


38 13 40 13 9 34 12 35 13 9 52 18 50


94 48 22 15 50 38 1 1 0.5 Mn 69 26 23 13 23


46 55 77


180 I-12


120 69 16 14 71 97 235 C-14 25 88 I-30


39 1 1 0.5 Mn 72 30 37 15 24 35 130 C-30 21 4


60 25 40 17 19 47 20 38 15 13 87 I-30


67 32 20 15 27 43 120 C-32 22 48 21 36 15


80 I-10 13 70 C-14


42 18 43 13 15 18 64 C-19 11 44 18 35 14 10 44 20 32 14 13 40 18 35 15


70 I-14 70 I-9 67


35 17 30 12 13 60 I-8 3 9


1 10 4 10


4 11 4 Ni 4 9 1


39 18 30 12 18 22 65 C-11 13 34 17 30 10 15 27 14 20 11 13 82 27 40 17 28 77 28 21 16 20 90 35 15 18 102 43 11 19


61 I-5 55 I-5


10


125 I-40 23 140 I-30 22 160 I-15 30 195 C-9 32


4.5Ni, 1Mn 96 38 25 19 35 48 160 C-15 31 30Ni, 1Nb 70 40 25 21 12 Ni 16 Ni 20 Ni 25 Ni


39 17 35 16 40 17 30 16


140 C-78 18 60 65


48 26 22 19 24 31 80 C-11 15 58 33 15 19


130 16


8.5 21 8.5 23 8.4 22 7.9 9 7.7 9 8.2 22 8.3 22 8.3 7 8.3 7 8.7 19 8.7 19


8.7 18 8.8 18 8.8 13 8.9 15 8.9 17 9.0 12 9.2 13 9.4 16 7.5 13 7.5 16 7.5 15 7.5 11 7.5 11 8.9 8 8.9 7 8.9 7 8.9 6 8.9 6


18.6 19.6 21.8 7.4 7.7


19.3 21.5 6.1 6.5


10.9 12.4


13.8 12.3 10.8 12.4 14.9 10.0 11.6 9.0


12.2 15.1 13.0 8.9 8.9 8.9 6.5 5.4 5.0 4.6


to 87800, C90200 to C95900) applies to a broad class of alloys in which the prin- cipal alloying element is neither zinc nor nickel. As a result, bronze is the common name for a number of alloys that contain little, if any, tin. Manganese-Bronze (C86100 to C86800)—Manganese-bronze, which con- tains zinc (22-42%) as the major alloying element, is among the strongest cast copper alloys and is used for gears, bolts and valve stems. Where economically feasible, alumi- num-bronze replaces manganese-bronze because it offers high strength in combina- tion with better corrosion resistance. Silicon-Bronze and Silicon-Brass


(C87300 to C87800)—Silicon-bronze and silicon-brass are alloys of zinc and silicon


Table 2. Typical Properties of Commonly Used Copper-Base Casting Alloys Nominal Chemical Analysis (%)


Tensile Properties (psi in. set in. set x106 100 97


88 2.5 2 85 5 5 83 4 5


81 3 7


6.5 5 7


9 76 2.5 6.5 15 28 4 45 17 2Be, 0.5 Co 80 40 20 18 1 Ni 37 15 34 ) 40 C-45 150 10 14 55 12 63 1-8 55 13


38 16.5 34 12 14 18 65 C-11 11 36 16 30


34 14 27 10 38 14.9 37 15 13 16 58 C-12 11


that have low melting points and high fluidity, which favor permanent mold and diecasting. Because of its low lead content, silicon-bronze often is a replacement for leaded plumbing brasses, but its limited machinability inhibits use in high-volume potable water systems. It is currently being used as a substitute for semi-red brass in immersed pumps. Tin-Bronze (C90200 to C91700)—Tin-


bronze is an alloy of copper and tin with good aqueous corrosion-resistance. Addi- tional attributes include high strength, good wear resistance and a low friction coefficient compared to steel. This accounts for its use in bearings, piston rings and gear parts. Leaded Tin-Bronze (C92200 to C92900)—These alloys are a tin-bronze


Compression Strength


Cu Sn Pb Zn Fe Al Others UTS YS Elon. Elon. 0.001 0.01 Bhn Impact* Fatigue** Spec. Thermal Electrical (ksi) (ksi) (%)


(ft lb)


strength gravity cond.% cond. % (ksi)


8.9 100 8.3 30 8.8


8.8 18 8.7 18


8.7 18 8.8 18


of copper IACS 100


20


20 15


15.2


16.6 16.5


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