The cobalt-based alloy Haynes 188TM has outstanding strength at high temperatures and outstanding resistance to oxidation up to 2000° F. Because Haynes 188TM has strong metallurgical stability and sulfidation resistance, it is simple to produce.
Element
Min
Max
Carbon
0.05
0.15
Manganese
--
1.25
Silicon
0.20
0.50
Phosphorus
--
0.02
Sulfur
--
0.015
Chromium
21.0
23.0
Nickel
20.0
24.0
Tungsten
13.0
15.0
Lanthanum
0.03
0.12
Boron
--
0.015
Iron
--
3.0
Cobalt
Bal.
Physical Properties
Physical Properties
°F
British Units
°C
Metric Units
Density
72
0.324 lb./in.(3)
22
8.98 g/cm(3)
Incipient Fusion
Temperature
2375-
2425
1302-
1330
--Electrical
Resistivity
70
39.6 microhm-in.
21
1.01 microhm-m
Mean Coefficient
of Thermal
Expansion
70 to -400
5.4 microin./in.-°F
21 to -200
9.7 X 10(-6)m/m-K
70 to -200
5.8 microin./in.-°F
21 to -129
10.4 X 10(-6)m/m-K
70-0
6.2 microin./in.-°F
21 to -18
11.2 X 10(-6)m/m-K
70-100
6.2 microin./in.-°F
21-38
11.5 X 10(-6)m/m-K
70-200
6.6 microin./in.-°F
21-93
11.9 X 10(-6)m/m-K
70-400
7.0 microin./in.-°F
21-204
12.6 X 10(-6)m/m-K
70-600
7.4 microin./in.-°F
21-316
13.3 X 10(-6)m/m-K
70-800
7.8 microin./in.-°F
21-427
14.0 X 10(-6)m/m-K
70-1000
8.2 microin./in.-°F
21-538
14.8 X 10(-6)m/m-K
70-1200
8.6 microin./in.-°F
21-649
15.5 X 10(-6)m/m-K
70-1400
9.0 microin./in.-°F
21-760
16.2 X 10(-6)m/m-K
70-1600
9.4 microin./in.-°F
21-871
16.9 X 10(-6)m/m-K
70-1800
9.9 microin./in.-°F
21-982
17.8 X 10(-6)m/m-K
70-2000
10.3 microin./in.-°F
21-1093
18.5 X 10(-6)m/m-K
Thermal
Conductivity
100
75 Btu-in/ft²-hr-°F
38
10.8 W/m-K
400
100 Btu-in/ft²-hr-°F
204
14.4 W/m-K
600
112 Btu-in/ft²-hr-°F
316
16.1 W/m-K
800
125 Btu-in/ft²-hr-°F
427
18.0 W/m-K
1000
138 Btu-in/ft²-hr-°F
538
19.9 W/m-K
1200
152 Btu-in/ft²-hr-°F
649
21.9 W/m-K
1400
167 Btu-in/ft²-hr-°F
760
24.1 W/m-K
Thermal
Diffusivity
572
0.006 in²/sec
300
3.9 x 10(-6)m²/s
752
0.006 in²/sec
400
3.9 x 10(-6)m²/s
932
0.007 in²/sec
500
4.5 x 10(-6)m²/s
1112
0.007 in²/sec
600
4.5 x 10(-6)m²/s
1409
0.008 in²/sec
765
5.2 x 10(-6)m²/s
1652
0.008 in²/sec
900
5.2 x 10(-6)m²/s
2012
0.009 in²/sec
1100
5.8 x 10(-6)m²/s
Magnetic Permeability
(Room Temperature)
1.01 at 200 oersteds (15,900 A/m)
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