strength in combination with better cor- rosion resistance. Silicon-Bronze and Silicon-Brass
(C87300 to C87800)—Silicon-bronze and silicon-brass are alloys of zinc and silicon 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
UNS Alloy Number Name
C81100 Copper
C82500 Beryllium copper
C83450 Leaded red brass
C83600 C83800
C84400 Leaded semi- red brass
C84800
C85400 C85700
wear resistance and a low friction coefficient compared to steel. Tis accounts for its use in bearings, piston rings and gear parts. Leaded Tin-Bronze (C92200 to C92900)—These alloys are a tin- bronze containing 0.3-6% lead. Leaded tin-bronze offers the addi- tional advantage of free cutting. High-Leaded Tin Bronze (C93100 to C94500)—Tis is a tin-bronze contain- ing 2-34% lead. High-leaded tin-bronze is used in sleeve bearings and bushings because the additional lead provides improved lubricity. Nickel-Tin-Bronze (C94700 to C94900)—Tis is a tin-bronze contain- ing 4-6% nickel. Nickel-tin-bronze is a versatile alloy that has the good wear
Table 2. Typical Properties of Commonly Used Copper-Base Casting Alloys Nominal Chemical Analysis (%)
Tensile Properties )
resistance and corrosion resistance found in tin-bronzes with improved strength. Nickel-tin-bronze is used in bearings, gears, wear guides, pump and valve components, and motion and translation devices, such as shift forks and circuit breaker parts. Aluminum-Bronze (C95200 to C95900)—Aluminum-bronze has a complex metallurgical structure that imparts both strength and oxidiza- tion resistance due to the formation of alumina-rich protective films. Tese alloys are wear-resistant and exhibit good casting and welding characteristics. Teir corrosion resistance is superior in seawater, chloride and diluted acids. Applications are varied and include
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) (%) (psi in. set in. set x106
(ft lb) strength gravity cond.% cond. % (ksi)
100 97
88 2.5 2 85 5 5 83 4 5
6.5 5 7
81 3 7 9 76 2.5 6.5 15
C85200 Leaded yellow brass 72 1
67 1 61
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
88 6 1.5 87 8 1 87 10 1
C93200 High-leaded tin 83 7 7 C93500 Bronze C93700 C93800 C94300
C95200 Al bronze 88 C95300 C95400 C95500 C95800
C96400 Cupronickel 30% 67
C97300 Leaded nickel 57 2 9 20 C97400 Silver C97600 C97800
60 3 5 16
64 4 4 8 66 5 2
2 *I-Izod C-Charpy **endurance limit—100 million cycles 2012 Casting sourCe DireCtory Metal Casting Design & PurChasing 33
89 86 81
81.5 1
3 3 1
1
24 29 37
28 4 45 17 2Be, 0.5 Co 80 40 20 18 1 Ni 37 15 34 10
38 16.5 34 12 14 36 16 30
12 34 14 27 10 38 14.9 37 15 13 0.3
26 3 4 3 Mn 25 3 6 4 Mn
14 2 4
4.5 4 2 3
85 5 9 1 80 10 10 78 7 15 70 5 25
3 9 1 10 4 10
4 11 4 Ni
4 Si 4 Si
38 13 40 13 9 34 12 35 13 9 52 18 50
94 48 22 15 50 120 69 16
38 1 1 0.5 Mn 69 26 23 13 23 60 25 40 17 19 47 20 38 15 13
42 18 43 13 15 44 18 35 14 10 44 20 32 14 13 40 18 35 15
35 17 30 12 13 13 40 C-45 150 14 55
18 65 C-11 63 1-8
55 16 58 C-12
46 55 77
180 I-12
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
87 I-30
67 32 20 15 27 43 120 C-32 22 48 21 36 15
80 I-10 70 C-14
18 64 C-19 70 I-14 70 I-9 67
60 I-8
39 18 30 12 18 22 65 C-11 34 17 30 10 15 27 14 20 11
82 27 40 17 28 77 28 21 90 35 15 102 43 11
30Ni, 1Nb 70 40 25 21 12 Ni 16 Ni 20 Ni 25 Ni
39 17 35 16 40 17 30 16
19
16 20 18 19
13
61 I-5 10 55 I-5
4 9 4.5Ni, 1Mn 96 38 25 19 35 48 160 C-15 1
48 26 22 19 24 31 80 C-11 58 33 15
130
125 I-40 23 140 I-30 22 160 I-15 30 195 C-9 32 31
140 C-78 18 60 65
15 13 11 16 11
13 11
8.9 100 8.3 30 8.8
8.8 18 8.7 18
8.7 18 8.8 18
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 7.5 7.5 7.5 7.5
8.9 8 8.9 7 8.9 7 8.9 6 8.9 6
13 16 15 11 11
of copper IACS 100
20
20 15
15.2
16.6 16.5
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
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