Hastelloy C-22 TECHNICAL DATA

Type Analysis | Corrosion Resistance | Workability | Specifications | Applications | Average Physical Properties


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

Hastelloy C-22 - Current Inventory Stock

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