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Haynes Hastelloy® C-276 alloy, solution heat treated flat products
Categories: Metal; Nonferrous Metal; Nickel Alloy; Superalloy
Material Notes: Hastelloy® C-276 alloy is a nickel-molybdenum-chromium wrought alloy that is a versatile corrosion-resistant alloy. C-276 alloy is an improved wrought version of alloy C in that it usually doesn't need to be solution heat-treated after welding and has vastly improved fabricability. This alloy 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. However, in environments where attack of the C-276 alloy weld joint is experienced. C-22® weld filler materials should be considered. C-276 alloy has excellent resistance to localized corrosion and to both oxidizing and reducing media. Because of its versatility, C-276 alloy can be used where "upset" conditions are likely to occur or in multipurpose plants.

Hastelloy C-276 alloy excellent 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 and brine solutions. It is used in flue gas desulfurizations systems because of its excellent resistance to sulfur compounds and chloride ions encountered in most scrubbers. C-276 alloy has excellent resistance to pitting and to stress- corrosion cracking. It is also one of the few materials that withstands the corrosive effects of wet chlorine gas, hypochlorite, and chlorine dioxide.

Hastelloy C-276 alloy can be forged, hot-upset, and impact extruded. Although the alloy tends to work-harden, it can be successfully deep-drawn, spun, press formed or punched. All of the common methods of welding can be used to weld Hastelloy C-276 alloy, although the oxyacetylene process is not recommended. Special precautions should be taken to avoid excessive heat input.

Hastelloy C-276 is available in the form of plate, sheet, strip, billet, bar, wire, covered electrodes, pipe, tubing, pipe fittings, flanges, fittings.

Heat Treatment: C-276 alloy is normally solution heat-treated at 2050°F (1121°C) and rapid quenched. If possible, parts which have been hot-formed should be solution heat-treated prior to final fabrication or installation.

Data provided by the manufacturer, Haynes International, Inc.
Key Words: UNS N10276, ASME SB-574, ASME SB-575, ASME SB-619, ASME SB-622, and ASME SB-626
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 8.89 g/ccat RT
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell B 87plate
 90sheet
Tensile Strength, Ultimate 601.2 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 538 °C
 613 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 538 °C
 630.9 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 427 °C
 644.7 MPa
@Thickness 2.40 mm,
Temperature 427 °C
 650.2 MPa
@Thickness 2.00 mm,
Temperature 427 °C
 650.2 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 316 °C
 653.6 MPa
@Thickness 25.4 mm,
Temperature 427 °C
 655 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 427 °C
 664 MPa
@Thickness 25.4 mm,
Temperature 316 °C
 668.8 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 316 °C
 673 MPa
@Thickness 2.40 mm,
Temperature 316 °C
 681.2 MPa
@Thickness 2.00 mm,
Temperature 316 °C
 681.9 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 204 °C
 693.6 MPa
@Thickness 2.00 mm,
Temperature 204 °C
 695 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 204 °C
 696.4 MPa
@Thickness 2.40 mm,
Temperature 204 °C
 792.2 MPa
@Thickness 2.00 mm,
Temperature 20.0 °C
 826.7 MPa
@Thickness 25.4 mm,
Temperature 20.0 °C
Tensile Strength, Yield 204.8 MPa
@Thickness 2.40 mm,
Temperature 427 °C		0.2% offset
 210.3 MPa
@Thickness 25.4 mm,
Temperature 427 °C		0.2% offset
 225.5 MPa
@Thickness 2.00 mm,
Temperature 427 °C		0.2% offset
 225.5 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 427 °C		0.2% offset
 226.2 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 538 °C		0.2% offset
 231 MPa
@Thickness 2.40 mm,
Temperature 316 °C		0.2% offset
 233.1 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 538 °C		0.2% offset
 235.1 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 316 °C		0.2% offset
 239.9 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 427 °C		0.2% offset
 247.5 MPa
@Thickness 2.00 mm,
Temperature 316 °C		0.2% offset
 249.6 MPa
@Thickness 25.4 mm,
Temperature 316 °C		0.2% offset
 259.9 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 316 °C		0.2% offset
 263.4 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 204 °C		0.2% offset
 275.1 MPa
@Thickness 2.40 mm,
Temperature 204 °C		0.2% offset
 289.6 MPa
@Thickness 2.00 mm,
Temperature 204 °C		0.2% offset
 290.3 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 204 °C		0.2% offset
 355.8 MPa
@Thickness 2.00 mm,
Temperature 20.0 °C		0.2% offset
 364.7 MPa
@Thickness 25.4 mm,
Temperature 20.0 °C		0.2% offset
Elongation at Break 56 %
@Thickness 1.60 - 4.70 mm,
Temperature 204 °C		in 50.8 mm
 58 %
@Thickness 2.40 mm,
Temperature 204 °C		in 50.8 mm
 59 %
@Thickness 25.4 mm,
Temperature 20.0 °C		in 50.8 mm
 59 %
@Thickness 2.00 mm,
Temperature 204 °C		in 50.8 mm
 59 %
@Thickness 4.80 - 25.4 mm,
Temperature 538 °C		in 50.8 mm
 60 %
@Thickness 1.60 - 4.70 mm,
Temperature 538 °C		in 50.8 mm
 60 %
@Thickness 4.80 - 25.4 mm,
Temperature 427 °C		in 50.8 mm
 61 %
@Thickness 2.00 mm,
Temperature 20.0 °C		in 50.8 mm
 61 %
@Thickness 4.80 - 25.4 mm,
Temperature 204 °C		in 50.8 mm
 61 %
@Thickness 25.4 mm,
Temperature 427 °C		in 50.8 mm
 63 %
@Thickness 25.4 mm,
Temperature 316 °C		in 50.8 mm
 64 %
@Thickness 2.40 mm,
Temperature 316 °C		in 50.8 mm
 64 %
@Thickness 2.40 mm,
Temperature 427 °C		in 50.8 mm
 64 %
@Thickness 1.60 - 4.70 mm,
Temperature 316 °C		in 50.8 mm
 65 %
@Thickness 1.60 - 4.70 mm,
Temperature 427 °C		in 50.8 mm
 66 %
@Thickness 4.80 - 25.4 mm,
Temperature 316 °C		in 50.8 mm
 67 %
@Thickness 2.00 mm,
Temperature 427 °C		in 50.8 mm
 68 %
@Thickness 2.00 mm,
Temperature 316 °C		in 50.8 mm
Modulus of Elasticity 205 GPaRT
 176 GPa
@Temperature 538 °C		heat treated at 1121°C (2050°F) and rapid quenched
 182 GPa
@Temperature 427 °C		heat treated at 1121°C (2050°F) and rapid quenched
 188 GPa
@Temperature 316 °C		heat treated at 1121°C (2050°F) and rapid quenched
 195 GPa
@Temperature 204 °C		heat treated at 1121°C (2050°F) and rapid quenched
Charpy Impact 87.0 J
@Temperature -196 °C		V Notch; plate; aged 1000 hours at 538°C (1000°F)
 130 J
@Temperature -196 °C		V Notch; plate; aged 100 hours at 538°C (1000°F)
 339 J
@Temperature -196 °C		V Notch; plate; aged 100 hours at 260°C
 357 J
@Temperature -196 °C		V Notch; plate; solution heat treated at 1121°C (2050°F), rapid quenched
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.000130 ohm-cm
@Temperature 24.0 °C
 
Thermal PropertiesOriginal ValueComments
CTE, linear 11.2 µm/m-°C
@Temperature 24.0 - 93.0 °C
 12.0 µm/m-°C
@Temperature 24.0 - 204 °C
 12.8 µm/m-°C
@Temperature 24.0 - 316 °C
 13.2 µm/m-°C
@Temperature 24.0 - 427 °C
 13.4 µm/m-°C
@Temperature 24.0 - 538 °C
Specific Heat Capacity 0.427 J/g-°CRT
Thermal Conductivity 7.20 W/m-K
@Temperature -168 °C
 8.60 W/m-K
@Temperature -73.0 °C
 9.40 W/m-K
@Temperature -18.0 °C
 10.2 W/m-K
@Temperature 38.0 °C
 11.1 W/m-K
@Temperature 93.0 °C
 13.0 W/m-K
@Temperature 204 °C
 15.0 W/m-K
@Temperature 316 °C
 16.9 W/m-K
@Temperature 427 °C
 19.0 W/m-K
@Temperature 538 °C
Melting Point 1323 - 1371 °C
Solidus 1323 °C
Liquidus 1371 °C
 
Component Elements PropertiesOriginal ValueComments
Carbon, C <= 0.010 %
Chromium, Cr 14.5 - 16.5 %
Cobalt, Co <= 2.5 %
Iron, Fe 4.0 - 7.0 %
Manganese, Mn <= 1.0 %
Molybdenum, Mo 15 - 17 %
Nickel, Ni 57 %
Phosphorus, P <= 0.025 %
Silicon, Si <= 0.080 %
Sulfur, S <= 0.010 %
Tungsten, W 3.0 - 4.5 %
Vanadium, V <= 0.35 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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