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Haynes Hastelloy® C-22HS® Nickel Alloy Plate and Bar, Hot-rolled, Solution Annealed, Age-hardened
Categories: Metal; Nonferrous Metal; Nickel Alloy
Material Notes: Outstanding Corrosion Resistance, High Strength

HASTELLOY® C-22HSTM alloy is corrosion-resistant, nickel-chromium-molybdenum alloy which can be heat treated to obtain a strength approximately double that of other C-type alloys. Importantly, the corrosion resistance and ductility of the alloy remain excellent when in the high strength condition. In addition to its high uniform corrosion resistance in oxidizing as well as reducing environments, the as-heat treated C-22HS alloy possesses high resistance to chloride-induced pitting and crevice corrosion attack.

C-22HS alloy is available in the form of plate, sheet, strip, billet, bar, wire, pipe, and tube.

Heat Treatment: The high strength of C-22HS alloy is derived from the formation of strengthening particles of Ni2(Mo,Cr) which form during the patented two-step age-hardening heat treatment. The approximately 48 hour heat treatment, 1300°F (705°C) FC to 1125°F (605°C)/32 hours/AC, is described in more detail on page 14.

Solution Annealed and Filler Wire Applications: C-22HS alloy may also be considered for applications which do not require the high strength imparted by the heat treatment. In the annealed condition, C-22HS alloy has even higher corrosion-resistance, particularly with regard to localized corrosive attack. This localized attack resistance also makes the alloy an attractive candidate as a general-purpose filler metal or weld overlay.

Applications:

  • Agitators and blenders
  • Shafting
  • Fan blades and hubs
  • Fasteners
  • Springs
  • Valves
  • Dies
  • Screws
  • Wellhead parts
  • Rings and gaskets

Heat Treatment: Wrought forms of C-22HS alloy are furnished in the solution annealed condition, unless otherwise specified. The standard solution annealing treatment consists of heating to 1975°F (1080°C) followed by rapid air-cooling or water quenching. Parts which have been hot formed should be solution annealed prior to final fabrication or installation. To use the alloy in the high-strength condition, it is necessary to age-harden using a two step treatment of 1300°F (705°C) for 16 hours, furnace cooling to 1125°F (605°C) and holding at that temperature for 32 hours, followed by an air cool. Cold or hot-worked structures should normally be given a full solution anneal prior to performing the age-hardening treatment.

Forming: C-22HS alloy has excellent forming characteristics, and cold forming is the preferred method of shaping. The alloy can be easily cold worked due to its good ductility. The alloy is generally stiffer than the austenitic stainless steels; therefore more energy is required during cold forming.

Machining: C-22HS alloy may be machined in either the solution annealed or age-hardened condition. Carbide or ceramic tools are recommended. For use in the age-hardened condition, it is suggested to rough machine in the annealed condition. After performing the age-hardening heat treatment, light machining may be performed to achieve desired final dimensions.

Data provided by the manufacturer, Haynes International, Inc.
Vendors: Visit metalmen for your metals needs. Products include special chemistry, tight tolerances, custom tempers, odd dimensions/forms, and small quantities. Phone 1-800-767-9494.

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Physical PropertiesOriginal ValueComments
Density 8.60 g/ccannealed
 8.64 g/ccage-hardened
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Ultimate 902 MPa
@Temperature 600 °C
 964 MPa
@Temperature 500 °C
 1006 MPa
@Temperature 400 °C
 1047 MPa
@Temperature 300 °C
 1089 MPa
@Temperature 200 °C
 1153 MPa
@Temperature 100 °C
 1202 MPa
@Temperature 25.0 °C
Tensile Strength, Yield 488 MPa
@Strain 0.2 %,
Temperature 600 °C
 507 MPa
@Strain 0.2 %,
Temperature 500 °C
 518 MPa
@Strain 0.2 %,
Temperature 400 °C
 539 MPa
@Strain 0.2 %,
Temperature 300 °C
 579 MPa
@Strain 0.2 %,
Temperature 200 °C
 627 MPa
@Strain 0.2 %,
Temperature 100 °C
 690 MPa
@Strain 0.2 %,
Temperature 25.0 °C
Elongation at Break 44.2 %
@Temperature 25.0 °C
 47.7 %
@Temperature 100 °C
 48.3 %
@Temperature 200 °C
 49.2 %
@Temperature 600 °C
 50.3 %
@Temperature 500 °C
 52.3 %
@Temperature 400 °C
 52.7 %
@Temperature 300 °C
Reduction of Area 55.7 %
@Temperature 100 °C
 57.7 %
@Temperature 25.0 °C
 60 %
@Temperature 200 °C
 63.2 %
@Temperature 500 °C
 63.4 %
@Temperature 400 °C
 63.9 %
@Temperature 300 °C
 66.9 %
@Temperature 600 °C
Modulus of Elasticity 181 GPa
@Temperature 600 °C		Dynamic
 195 GPa
@Temperature 500 °C		Dynamic
 205 GPa
@Temperature 400 °C		Dynamic
 209 GPa
@Temperature 300 °C		Dynamic
 211 GPa
@Temperature 200 °C		Dynamic
 218 GPa
@Temperature 100 °C		Dynamic
 223 GPa
@Temperature 25.0 °C		Dynamic
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000980 ohm-cm
@Temperature 25.0 °C
 0.000100 ohm-cm
@Temperature 100 °C
 0.000104 ohm-cm
@Temperature 200 °C
 0.000108 ohm-cm
@Temperature 300 °C
 0.000112 ohm-cm
@Temperature 400 °C
 0.000115 ohm-cm
@Temperature 500 °C
 0.000117 ohm-cm
@Temperature 600 °C
 
Thermal PropertiesOriginal ValueComments
CTE, linear 11.6 µm/m-°C
@Temperature 25.0 - 100 °C
 12.0 µm/m-°C
@Temperature 25.0 - 200 °C
 12.4 µm/m-°C
@Temperature 25.0 - 300 °C
 12.7 µm/m-°C
@Temperature 25.0 - 400 °C
 13.1 µm/m-°C
@Temperature 25.0 - 500 °C
 13.3 µm/m-°C
@Temperature 25.0 - 600 °C
Specific Heat Capacity 0.412 J/g-°C
@Temperature 25.0 °C
 0.434 J/g-°C
@Temperature 100 °C
 0.451 J/g-°C
@Temperature 200 °C
 0.465 J/g-°C
@Temperature 300 °C
 0.477 J/g-°C
@Temperature 400 °C
 0.488 J/g-°C
@Temperature 500 °C
 0.504 J/g-°C
@Temperature 600 °C
Thermal Conductivity 11.8 W/m-K
@Temperature 25.0 °C
 13.5 W/m-K
@Temperature 100 °C
 15.4 W/m-K
@Temperature 200 °C
 17.1 W/m-K
@Temperature 300 °C
 18.6 W/m-K
@Temperature 400 °C
 20.5 W/m-K
@Temperature 500 °C
 22.4 W/m-K
@Temperature 600 °C
Melting Point 1304 - 1368 °C
Solidus 1304 °C
Liquidus 1368 °C
 
Processing PropertiesOriginal ValueComments
Annealing Temperature 1975 °FFollowed by rapid air cooling or water quench
Aging Temperature 1125 °F
@Time 115000 sec		Age Hardening Step 2, follow by air cooling
 1300 °F
@Time 57600 sec		Age Hardening Step 1; then furnace cool to step 2
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al <= 0.50 %
Boron, B <= 0.0060 %
Carbon, C <= 0.010 %
Chromium, Cr 21 %
Cobalt, Co <= 1.0 %
Iron, Fe <= 2.0 %
Manganese, Mn <= 0.80 %
Molybdenum, Mo 17 %
Nickel, Ni 57 %as balance
Silicon, Si <= 0.080 %
Tungsten, W <= 1.0 %
 
Descriptive Properties
Thermal Diffusivity0.0334 cm2/sat 25°C
 0.0362 cm2/sat 100°C
 0.0398 cm2/sat 200°C
 0.0427 cm2/sat 300°C
 0.0454 cm2/sat 400°C
 0.0489 cm2/sat 500°C
 0.0517 cm2/sat 600°C

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