2015 Casting Source Directory

which do not contain silver, offer good corrosion resistance, ease of castability and good machinability. Despite their high degree of alloying, these alloys are simple solid solutions. Major uses include hardware for food processing, seals, architectural trim and musical instrument valves. Leaded-Coppers (C98200 to C98840)—These are essentially pure copper or high-copper alloys contain- ing lead. The leaded-coppers offer the moderate corrosion resistance and high conductivity of the copper alloys, in addition to the lubricity and

low friction characteristics of high- leaded bronzes. Special Alloys (C99300 to C99750)—These are alloys with unique characteristics, such as Incra- ment 800 (C99300), which has high oxidation resistance due to alumi- num, good thermal fatigue resistance and high hot hardness. This alloy was developed for glass processing including glassmaking molds and plate glass rolls.

Design Considerations Te choice of alloy and casting

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

UNS Number

Alloy Name

C81100 Copper C82500

C83600 C83800

C84400 Leaded semi- red brass

C84800

C85200 Leaded yellow brass

C85400 C85700

C86200 Mn bronze C86300 C86400 C86500

Beryllium copper

C83450 Leaded red brass

Cu

100 97

88 85

83 81

76 72

67 61

64 62 58 58

C87200 Silicon bronze 92 C87500 Silicon brass 82 C90300 Tin bronze C90500

C92200 Leaded tin bronze

C92300 C92600

87 87

C93200 High-leaded tin 83 C93500 Bronze C93700 C93800 C94300

C95200 Al bronze C95300 C95400 C95500 C95800

85 80 78 70 88 89 86 81

81.5

C96400 Cupronickel 30% 67 C97300 Leaded nickel 57 C97400 Silver C97600 C97800

*I-Izod C-Charpy

60 64 66

2 3 4 5

9 5 4 2

2015 CASTING SOURCE DIRECTORY

20 16 8 2

2.5 2 5

4 3

7

1 1

3 3

1 1

5 5

6.5 5

7 9

2.5 6.5 15 1

24 29

37 26 25 38 39 4

88 88 88

10 8 6

8

10 7 5

10 7 5

14 2 4

1.5 1

1

7 9

10 15

25

3 1

4 4 4 1

9

10 10

11 4 Ni

4.5 4

2 3 1

0.3

3 3 1 1

4 3 Mn 6 4 Mn 1 0.5 Mn 1 0.5 Mn 4 Si

4 Si Sn Pb Zn Fe Al Others

UTS (ksi)

28

2Be, 0.5 Co 80 1 Ni

37 38

36 34

38 38

34 52 94

(ksi)

Tensile Properties YS

4 45

40 20 15

34

16.5 34 16

14

14.9 37 13

12 18

48

120 69 69 72 60

26

67 48 47 42

44 44 40 35 39 34 27 82 77 90

9 4.5Ni, 1Mn 96 30Ni, 1Nb 70 12 Ni 16 Ni 20 Ni 25 Ni

**endurance limit—100 million cycles METAL CASTING DESIGN & PURCHASING 37

32 21

20 18

18

20 18 17 18 17 14 27 28 35

102 43 38

39 40 48 58

12

30 27

40 35

50 22 16

23

30 37 25

40 20 36 38 43

35 32 35 30 30 30 20 40 21 15 11

25

40 25 17 17

26 33

35 30 22 15

10 15

13 13

15

method (sand, permanent mold, die or investment casting) determines the mechanical and physical properties, section size, wall thickness and surface finish that can be achieved with copper-based alloys. Each alloy and casting process combination results in a different set of properties. If metalcasting facilities and design engineers can work together on the “raw” or ideal component, all options can be considered early in the design process, resulting in a design and component that take advantage of the versatility that copper alloys offer. ■

Compression Strength

Elon. (%)

Elon. (psi x106

17 18

10 14

12

13 9

9 50

14 71 13 15 17

15 15 15 13

97

23 24 19

27

13 15

14 10 14 13 15 12 12

13 18

10 15 11

17 16 18 19 19 21 16 16 19 19

13

28 20

35 43 16

14 18

)

0.001 in. set

0.01 in. set

Bhn Impact* (ft lb)

40 C-45 150

55

65 C-11 63 1-8

55

58 C-12 46

55 77

180 I-12 235 C-14 88 I-30 130 C-30 87 I-30

18

120 C-32 80 I-10 70 C-14 64 C-19

70 I-14 70 I-9 67

22

60 I-8 65 C-11 61

I-5 35 48

55 I-5 125 I-40 140 I-30 160 I-15 195 C-9 160 C-15 140 C-78 60 65

24 31

80 C-11 130

25 21

22 13

11 11

13 11

Fatigue** strength (ksi)

Spec. gravity

8.9 8.3

8.8 8.8

8.7 8.7

8.8 8.5

8.5

Thermal cond.% of copper

100 30

18 18

18 18

21 23

8.4 22 7.9 7.7 8.2 8.3 8.3

9 9

22 22 7

8.3 8.7 8.7 8.7

16

13 10

23 22 30 32 31 18

8.8 8.8 8.9 8.9 9.0 9.2

7

19 19 18

18 13 15 17 12 13

15

9.4 16 7.5 7.5 7.5 7.5 7.5 8.9 8.9 8.9 8.9 8.9

13 16 15 11 11 8 7 7 6 6

Electrical cond.% 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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