Element
|
Min
|
Max
|
Molybdenum
|
12.5
|
14.5
|
Chromium
|
20.0
|
22.5
|
Iron
|
2.00
|
6.00
|
Tungsten
|
2.50
|
3.50
|
Cobalt
|
--
|
2.50
|
Carbon
|
--
|
0.010
|
Silicon
|
--
|
0.08
|
Manganese
|
--
|
0.50
|
Vanadium
|
--
|
0.35
|
Phosphorus
|
--
|
0.025
|
Sulfur
|
--
|
0.010
|
Nickel
|
Remainder
|
Corrosion
Resistance in the As-Welded Condition
Hastelloy C-22 is a
versatile nickel-chromium-molybdenum alloy with better overall
corrosion resistance than other Ni-Cr-Mo alloys available today,
including hastelloy C-276, C-4, and A625. Alloy C-22 has outstanding
resistance to pitting, crevice corrosion and stress-corrosion
cracking. It has excellent resistance to oxidizing aqueous media
including acids with oxidizing agents, wet chlorine and mixtures
containing nitric acid or oxidizing acids with chlorine ions.
Hastelloy C-22 has outstanding resistance to both reducing and
oxidizing media, and because of its versatility can be used where
"upset" conditions are likely to occur or in multipurpose
plants. Hastelloy C-22 has exceptional resistance to a wide
variety of chemical process environments, including strong oxidizers
such as ferric and cupric chlorides, hot contaminated media (organic
and inorganic), chlorine, formic and acetic acids, acetic anhydride,
and seawater amd brine solutions. Hastelloy C-22 resists the
formation of grain boundary precipitates in the weld heat affected
zone, thus making it suitable for most chemical process applications
in the as-welded condition.
Workability
Hastelloy C-22 can be
fabricated using the same techniques as are used for alloys C-276 or
C-4. It can be welded, forged, hot-upset and impact extruded. Alloy
C-22 can also be successfully deep-drawn, spun, press formed or
punched, although the alloy tends to work-harden. Parts which have
been hot formed or severely cold formed should be heat treated at
2050 °F and rapid quenched prior to final fabrication or
installation.
Specifications
Hastelloy C-22 is
covered by ASME . Plate, sheet, strip, bar, tubing, and pipe are
covered by ASME specifications SB-574, SB-575, SB-619, SB-622 and
SB-626 and by ASTM specifications B-574, B-575, B-619, B-622 and
B-626. The UNS number is NO6022.
Applications
Some of the area of
present or potential use for alloy C-22 are: Acetic acid/Acetic
Anhydride, cellophane manufacturing, chlorine spargers, chlorination
systems, circuit board etching equipment, complex acid/chemical
mixtures, fans and blowers, galvanizing line equipment, gas scrubber
systems, geothermal wells, HF furnaces, incineration systems,
nuclear fuel reprocessing, pesticide production, phosphoric acid
applications, pickling system components, plate heat exchangers,
selective leaching systems, sulfur oxide cooling towers, sulfonation
systems, and tubular heat exchangers.
Average Physical Properties
Physical
Properties
|
°F
|
British
Units
|
°C
|
Metric
Units
|
Density
|
75
|
0.314 lb./in.(3)
|
24
|
8.69 g/cm(3)
|
Melting Range
|
2475- 2550
|
|
1357- 1399
|
|
Electrical Resistivity
|
75
|
44.8 microhm-in.
|
24
|
1.14 microhm-m
|
212
|
48.3 microhm-in.
|
100
|
1.23 microhm-m
|
392
|
48.7 microhm-in.
|
200
|
1.24 microhm-m
|
572
|
49.3 microhm-in.
|
300
|
1.25 microhm-m
|
752
|
49.6 microhm-in.
|
400
|
1.26 microhm-m
|
932
|
49.9 microhm-in.
|
500
|
1.27 microhm-m
|
1112
|
50.2 microhm-in.
|
600
|
1.28 microhm-m
|
Mean
Coefficient of Thermal Expansion
|
75-200
|
6.9 microin./in.-°F
|
24-93
|
12.4 X 10(-6)m/m-K
|
75-400
|
6.9 microin./in.-°F
|
24-204
|
12.4 X 10(-6)m/m-K
|
75-600
|
7.0 microin./in.-°F
|
24-316
|
12.6 X 10(-6)m/m-K
|
75-800
|
7.4 microin./in.-°F
|
24-427
|
13.3 X 10(-6)m/m-K
|
75-1000
|
7.7 microin./in.-°F
|
24-538
|
13.9 X 10(-6)m/m-K
|
75-1200
|
8.1 microin./in.-°F
|
24-649
|
14.6 X 10(-6)m/m-K
|
75-1400
|
8.5 microin./in.-°F
|
24-760
|
15.3 X 10(-6)m/m-K
|
75-1600
|
8.8 microin./in.-°F
|
24-871
|
15.8 X 10(-6)m/m-K
|
75-1800
|
9.0 microin./in.-°F
|
24-982
|
16.2 X 10(-6)m/m-K
|
Thermal Conductivity
|
118
|
70 Btu-in/ft²-hr-°F
|
48
|
10.1 W/m-K
|
212
|
77 Btu-in/ft²-hr-°F
|
100
|
11.1 W/m-K
|
392
|
93 Btu-in/ft²-hr-°F
|
200
|
13.4 W/m-K
|
572
|
108 Btu-in/ft²-hr-°F
|
300
|
15.5 W/m-K
|
752
|
121 Btu-in/ft²-hr-°F
|
400
|
17.5 W/m-K
|
932
|
135 Btu-in/ft²-hr-°F
|
500
|
19.5 W/m-K
|
1112
|
148 Btu-in/ft²-hr-°F
|
600
|
21.3 W/m-K
|
Thermal Diffusivity
|
70
|
0.004 in²/sec
|
21
|
2.7 x 10(-6)m²/s
|
212
|
0.005 in²/sec
|
100
|
3.0 x 10(-6)m²/s
|
392
|
0.005 in²/sec
|
200
|
3.5 x 10(-6)m²/s
|
572
|
0.006 in²/sec
|
300
|
3.9 x 10(-6)m²/s
|
752
|
0.007 in²/sec
|
400
|
4.2 x 10(-6)m²/s
|
932
|
0.007 in²/sec
|
500
|
4.6 x 10(-6)m²/s
|
1112
|
0.007 in²/sec
|
600
|
4.8 x 10(-6)m²/s
|
Average Dynamic Modulus of
Elasticity
Form
|
Condition
|
Test
Temp, °F(°C)
|
Average
Dynamic Modulus of Elasticity,10(6) psi (MPa)
|
Plate
|
Heat-treated at
2050 °F (1121 °C), Rapid Quenched
|
Room
|
29.9 (206)
|
200 (93)
|
29.4 (203)
|
400 (204)
|
28.5 (196)
|
600 (316)
|
27.6 (190)
|
800 (427)
|
26.6 (183)
|
1000 (538)
|
25.7 (177)
|
1200 (649)
|
24.8 (171)
|
1400 (760)
|
23.6 (163)
|
1600 (871)
|
22.4 (154)
|
1800 (982)
|
21.1 (145)
|
Average Room Temperature Hardness
Form
|
Hardness, Rockwell
|
Sheet
|
Rb 93
|
Plate
|
Rb 95
|
Average Tensile Data, Solution
Heat-Treated
Form
|
Test Temp., °F(°C)
|
Ultimate Tensile Strength ksi
(MPa)
|
Yield Strength
at 0.2% offset ksi (MPa)
|
Elongation in
2" percent
|
Sheet, 0.028- 0.125"
thick
|
Room 200 (93) 400
(204) 600 (316) 800 (427) 1000 (538) 1200 (649) 1400
(760)
|
116.3 (802) 109.5
(755) 101.6 (701) 97.7 (674) 95.4 (658) 90.7
(625) 84.6 (583) 76.0 (524)
|
58.5 (403) 53.8
(371) 43.9 (303) 41.8 (288) 41.0 (283) 39.7
(274) 36.1 (249) 34.5 (238)
|
57 58 57 62 67 61 65 63
|
Plate,
1/4-3/4" thick
|
Room 200 (93) 400
(204) 600 (316) 800 (427) 1000 (538) 1200 (649) 1400
(760)
|
113.9 (785) 107.1
(738) 98.1 (676) 94.5 (652) 91.5 (631) 87.5
(603) 83.2 (574) 75.6 (521)
|
54.1 (373) 48.8
(336) 40.5 (279) 36.3 (250) 34.6 (239) 34.0
(234) 32.1 (221) 31.0 (214)
|
62 65 66 68 68 67 69 68
|
Bar, 1/2 to
2" diameter
|
Room 200 (93) 400
(204) 600 (316) 800 (427) 1000 (538) 1200 (649) 1400
(760)
|
111.0 (765) 104.9
(723) 96.2 (663) 91.6 (631) 89.1 (614) 84.3
(581) 79.5 (548) 72.2 (498)
|
51.9 (358) 45.4
(313) 37.5 (259) 33.8 (233) 30.7 (212) 28.8
(199) 28.3 (195) 29.0 (200)
|
70 73 74 79 79 80 80 77
|
|