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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 PropertiesMetricEnglishComments
Density 8.89 g/cc0.321 lb/in³at RT
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell B 8787plate
 9090sheet
Tensile Strength, Ultimate  601.2 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 538 °C		87200 psi
@Thickness 0.189 - 1.00 in,
Temperature 1000 °F
 613 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 538 °C		88900 psi
@Thickness 0.0630 - 0.185 in,
Temperature 1000 °F
 630.9 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 427 °C		91500 psi
@Thickness 0.189 - 1.00 in,
Temperature 801 °F
 644.7 MPa
@Thickness 2.40 mm,
Temperature 427 °C		93510 psi
@Thickness 0.0945 in,
Temperature 801 °F
 650.2 MPa
@Thickness 2.00 mm,
Temperature 427 °C		94300 psi
@Thickness 0.0787 in,
Temperature 801 °F
 650.2 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 316 °C		94300 psi
@Thickness 0.189 - 1.00 in,
Temperature 601 °F
 653.6 MPa
@Thickness 25.4 mm,
Temperature 427 °C		94800 psi
@Thickness 1.00 in,
Temperature 801 °F
 655 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 427 °C		95000 psi
@Thickness 0.0630 - 0.185 in,
Temperature 801 °F
 664 MPa
@Thickness 25.4 mm,
Temperature 316 °C		96300 psi
@Thickness 1.00 in,
Temperature 601 °F
 668.8 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 316 °C		97000 psi
@Thickness 0.0630 - 0.185 in,
Temperature 601 °F
 673 MPa
@Thickness 2.40 mm,
Temperature 316 °C		97600 psi
@Thickness 0.0945 in,
Temperature 601 °F
 681.2 MPa
@Thickness 2.00 mm,
Temperature 316 °C		98800 psi
@Thickness 0.0787 in,
Temperature 601 °F
 681.9 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 204 °C		98900 psi
@Thickness 0.189 - 1.00 in,
Temperature 399 °F
 693.6 MPa
@Thickness 2.00 mm,
Temperature 204 °C		100600 psi
@Thickness 0.0787 in,
Temperature 399 °F
 695 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 204 °C		101000 psi
@Thickness 0.0630 - 0.185 in,
Temperature 399 °F
 696.4 MPa
@Thickness 2.40 mm,
Temperature 204 °C		101000 psi
@Thickness 0.0945 in,
Temperature 399 °F
 792.2 MPa
@Thickness 2.00 mm,
Temperature 20.0 °C		114900 psi
@Thickness 0.0787 in,
Temperature 68.0 °F
 826.7 MPa
@Thickness 25.4 mm,
Temperature 20.0 °C		119900 psi
@Thickness 1.00 in,
Temperature 68.0 °F
Tensile Strength, Yield  204.8 MPa
@Thickness 2.40 mm,
Temperature 427 °C		29700 psi
@Thickness 0.0945 in,
Temperature 801 °F		0.2% offset
 210.3 MPa
@Thickness 25.4 mm,
Temperature 427 °C		30500 psi
@Thickness 1.00 in,
Temperature 801 °F		0.2% offset
 225.5 MPa
@Thickness 2.00 mm,
Temperature 427 °C		32710 psi
@Thickness 0.0787 in,
Temperature 801 °F		0.2% offset
 225.5 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 427 °C		32710 psi
@Thickness 0.189 - 1.00 in,
Temperature 801 °F		0.2% offset
 226.2 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 538 °C		32810 psi
@Thickness 0.189 - 1.00 in,
Temperature 1000 °F		0.2% offset
 231 MPa
@Thickness 2.40 mm,
Temperature 316 °C		33500 psi
@Thickness 0.0945 in,
Temperature 601 °F		0.2% offset
 233.1 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 538 °C		33810 psi
@Thickness 0.0630 - 0.185 in,
Temperature 1000 °F		0.2% offset
 235.1 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 316 °C		34100 psi
@Thickness 0.189 - 1.00 in,
Temperature 601 °F		0.2% offset
 239.9 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 427 °C		34790 psi
@Thickness 0.0630 - 0.185 in,
Temperature 801 °F		0.2% offset
 247.5 MPa
@Thickness 2.00 mm,
Temperature 316 °C		35900 psi
@Thickness 0.0787 in,
Temperature 601 °F		0.2% offset
 249.6 MPa
@Thickness 25.4 mm,
Temperature 316 °C		36200 psi
@Thickness 1.00 in,
Temperature 601 °F		0.2% offset
 259.9 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 316 °C		37700 psi
@Thickness 0.0630 - 0.185 in,
Temperature 601 °F		0.2% offset
 263.4 MPa
@Thickness 4.80 - 25.4 mm,
Temperature 204 °C		38200 psi
@Thickness 0.189 - 1.00 in,
Temperature 399 °F		0.2% offset
 275.1 MPa
@Thickness 2.40 mm,
Temperature 204 °C		39900 psi
@Thickness 0.0945 in,
Temperature 399 °F		0.2% offset
 289.6 MPa
@Thickness 2.00 mm,
Temperature 204 °C		42000 psi
@Thickness 0.0787 in,
Temperature 399 °F		0.2% offset
 290.3 MPa
@Thickness 1.60 - 4.70 mm,
Temperature 204 °C		42100 psi
@Thickness 0.0630 - 0.185 in,
Temperature 399 °F		0.2% offset
 355.8 MPa
@Thickness 2.00 mm,
Temperature 20.0 °C		51600 psi
@Thickness 0.0787 in,
Temperature 68.0 °F		0.2% offset
 364.7 MPa
@Thickness 25.4 mm,
Temperature 20.0 °C		52900 psi
@Thickness 1.00 in,
Temperature 68.0 °F		0.2% offset
Elongation at Break  56 %
@Thickness 1.60 - 4.70 mm,
Temperature 204 °C		56 %
@Thickness 0.0630 - 0.185 in,
Temperature 399 °F		in 50.8 mm
 58 %
@Thickness 2.40 mm,
Temperature 204 °C		58 %
@Thickness 0.0945 in,
Temperature 399 °F		in 50.8 mm
 59 %
@Thickness 25.4 mm,
Temperature 20.0 °C		59 %
@Thickness 1.00 in,
Temperature 68.0 °F		in 50.8 mm
 59 %
@Thickness 2.00 mm,
Temperature 204 °C		59 %
@Thickness 0.0787 in,
Temperature 399 °F		in 50.8 mm
 59 %
@Thickness 4.80 - 25.4 mm,
Temperature 538 °C		59 %
@Thickness 0.189 - 1.00 in,
Temperature 1000 °F		in 50.8 mm
 60 %
@Thickness 1.60 - 4.70 mm,
Temperature 538 °C		60 %
@Thickness 0.0630 - 0.185 in,
Temperature 1000 °F		in 50.8 mm
 60 %
@Thickness 4.80 - 25.4 mm,
Temperature 427 °C		60 %
@Thickness 0.189 - 1.00 in,
Temperature 801 °F		in 50.8 mm
 61 %
@Thickness 2.00 mm,
Temperature 20.0 °C		61 %
@Thickness 0.0787 in,
Temperature 68.0 °F		in 50.8 mm
 61 %
@Thickness 4.80 - 25.4 mm,
Temperature 204 °C		61 %
@Thickness 0.189 - 1.00 in,
Temperature 399 °F		in 50.8 mm
 61 %
@Thickness 25.4 mm,
Temperature 427 °C		61 %
@Thickness 1.00 in,
Temperature 801 °F		in 50.8 mm
 63 %
@Thickness 25.4 mm,
Temperature 316 °C		63 %
@Thickness 1.00 in,
Temperature 601 °F		in 50.8 mm
 64 %
@Thickness 2.40 mm,
Temperature 316 °C		64 %
@Thickness 0.0945 in,
Temperature 601 °F		in 50.8 mm
 64 %
@Thickness 2.40 mm,
Temperature 427 °C		64 %
@Thickness 0.0945 in,
Temperature 801 °F		in 50.8 mm
 64 %
@Thickness 1.60 - 4.70 mm,
Temperature 316 °C		64 %
@Thickness 0.0630 - 0.185 in,
Temperature 601 °F		in 50.8 mm
 65 %
@Thickness 1.60 - 4.70 mm,
Temperature 427 °C		65 %
@Thickness 0.0630 - 0.185 in,
Temperature 801 °F		in 50.8 mm
 66 %
@Thickness 4.80 - 25.4 mm,
Temperature 316 °C		66 %
@Thickness 0.189 - 1.00 in,
Temperature 601 °F		in 50.8 mm
 67 %
@Thickness 2.00 mm,
Temperature 427 °C		67 %
@Thickness 0.0787 in,
Temperature 801 °F		in 50.8 mm
 68 %
@Thickness 2.00 mm,
Temperature 316 °C		68 %
@Thickness 0.0787 in,
Temperature 601 °F		in 50.8 mm
Modulus of Elasticity 205 GPa29700 ksiRT
 176 GPa
@Temperature 538 °C		25500 ksi
@Temperature 1000 °F		heat treated at 1121°C (2050°F) and rapid quenched
 182 GPa
@Temperature 427 °C		26400 ksi
@Temperature 801 °F		heat treated at 1121°C (2050°F) and rapid quenched
 188 GPa
@Temperature 316 °C		27300 ksi
@Temperature 601 °F		heat treated at 1121°C (2050°F) and rapid quenched
 195 GPa
@Temperature 204 °C		28300 ksi
@Temperature 399 °F		heat treated at 1121°C (2050°F) and rapid quenched
Charpy Impact  87.0 J
@Temperature -196 °C		64.2 ft-lb
@Temperature -321 °F		V Notch; plate; aged 1000 hours at 538°C (1000°F)
 130 J
@Temperature -196 °C		95.9 ft-lb
@Temperature -321 °F		V Notch; plate; aged 100 hours at 538°C (1000°F)
 339 J
@Temperature -196 °C		250 ft-lb
@Temperature -321 °F		V Notch; plate; aged 100 hours at 260°C
 357 J
@Temperature -196 °C		263 ft-lb
@Temperature -321 °F		V Notch; plate; solution heat treated at 1121°C (2050°F), rapid quenched
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.000130 ohm-cm
@Temperature 24.0 °C		0.000130 ohm-cm
@Temperature 75.2 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear  11.2 µm/m-°C
@Temperature 24.0 - 93.0 °C		6.22 µin/in-°F
@Temperature 75.2 - 199 °F
 12.0 µm/m-°C
@Temperature 24.0 - 204 °C		6.67 µin/in-°F
@Temperature 75.2 - 399 °F
 12.8 µm/m-°C
@Temperature 24.0 - 316 °C		7.11 µin/in-°F
@Temperature 75.2 - 601 °F
 13.2 µm/m-°C
@Temperature 24.0 - 427 °C		7.33 µin/in-°F
@Temperature 75.2 - 801 °F
 13.4 µm/m-°C
@Temperature 24.0 - 538 °C		7.44 µin/in-°F
@Temperature 75.2 - 1000 °F
Specific Heat Capacity 0.427 J/g-°C0.102 BTU/lb-°FRT
Thermal Conductivity  7.20 W/m-K
@Temperature -168 °C		50.0 BTU-in/hr-ft²-°F
@Temperature -270 °F
 8.60 W/m-K
@Temperature -73.0 °C		59.7 BTU-in/hr-ft²-°F
@Temperature -99.4 °F
 9.40 W/m-K
@Temperature -18.0 °C		65.2 BTU-in/hr-ft²-°F
@Temperature -0.400 °F
 10.2 W/m-K
@Temperature 38.0 °C		70.8 BTU-in/hr-ft²-°F
@Temperature 100 °F
 11.1 W/m-K
@Temperature 93.0 °C		77.0 BTU-in/hr-ft²-°F
@Temperature 199 °F
 13.0 W/m-K
@Temperature 204 °C		90.2 BTU-in/hr-ft²-°F
@Temperature 399 °F
 15.0 W/m-K
@Temperature 316 °C		104 BTU-in/hr-ft²-°F
@Temperature 601 °F
 16.9 W/m-K
@Temperature 427 °C		117 BTU-in/hr-ft²-°F
@Temperature 801 °F
 19.0 W/m-K
@Temperature 538 °C		132 BTU-in/hr-ft²-°F
@Temperature 1000 °F
Melting Point 1323 - 1371 °C2413 - 2500 °F
Solidus 1323 °C2413 °F
Liquidus 1371 °C2500 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C <= 0.010 %<= 0.010 %
Chromium, Cr 14.5 - 16.5 %14.5 - 16.5 %
Cobalt, Co <= 2.5 %<= 2.5 %
Iron, Fe 4.0 - 7.0 %4.0 - 7.0 %
Manganese, Mn <= 1.0 %<= 1.0 %
Molybdenum, Mo 15 - 17 %15 - 17 %
Nickel, Ni 57 %57 %
Phosphorus, P <= 0.025 %<= 0.025 %
Silicon, Si <= 0.080 %<= 0.080 %
Sulfur, S <= 0.010 %<= 0.010 %
Tungsten, W 3.0 - 4.5 %3.0 - 4.5 %
Vanadium, V <= 0.35 %<= 0.35 %

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