Hastelloy C-276, also known as Alloy C-276, with the UNS designation N10276 and W. Nr. 2.4819, is a nickel-molybdenum-chrome alloy with tungsten known for its exceptional corrosion resistance in a wide range of aggressive environments. It offers resistance to pitting, crevice corrosion, and stress corrosion cracking, making it suitable for use in harsh chemical processing environments. Hastelloy C-276 also exhibits good mechanical properties at both ambient and elevated temperatures, further enhancing its applicability in various industrial applications. This alloy is commonly used in chemical processing, pollution control, pulp and paper production, and other environments where corrosion resistance is paramount.
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sales@cocessalloys.comChemical Composition
|
Nickel (Ni) |
Balance |
|
Molybdenum (Mo) |
15-17% max |
|
Chromium (Cr) |
14.5-16.5% |
|
Iron (Fe) |
4-7% |
|
Tungsten (W) |
3.0-4.5% |
|
Cobalt (Co) |
2.5 % max |
|
Manganese (Mn) |
1% max |
|
Carbon (C) |
0.01% max |
|
Vanadium (V) |
0.35 max |
|
Phosphorus (P) |
0.04% max |
|
Sulfur (S) |
0.03% max |
|
Silicon (Si) |
0.08% max |
Physical Properties
|
Density |
lb/in3 |
0.321 |
|
g/cm3 |
8.89 |
|
|
Melting Range |
°F |
2415-2500 |
|
°C |
1325-1370 |
|
|
Thermal Conductivity |
Btu•in/ft2•h•°F |
67.9 |
|
AW/m•°C |
9.8 |
|
|
Specific Heat |
Btu•lb•°F |
0.102 |
|
|
J/kg•°C |
427 |
|
Young’s Modulus |
103ksi |
29.8 |
|
|
GPa |
205 |
|
Shear Modulus |
103ksi |
11.4 |
|
GPa |
79 |
|
|
Permeability at 200 oersted (15.9 kA/m) |
|
1.0002 |
|
Poisson’s Ratio |
|
0.307 |
Mechanical Properties
|
Temperature |
Yield strength |
Tensile strength |
|||
|
Rp 0.2 |
Rm |
||||
|
°C |
°F |
MPa |
ksi |
MPa |
ksi |
|
20 |
68 |
310 |
45.0 |
700 |
101.5 |
Hastelloy C-276 is utilized in a variety of applications across different industries due to its exceptional corrosion resistance and versatility. Some typical applications include:
1. Chemical processing: It is used in the manufacturing of reactors, heat exchangers, and other equipment for chemical processing due to its resistance to a wide range of corrosive chemicals, including sulfuric acid, hydrochloric acid, acetic acid, and chlorine.
2. Pollution control: Hastelloy C-276 finds applications in flue gas desulfurization systems, scrubbers, and other pollution control equipment where resistance to corrosive gases and high temperatures is essential.
3. Pulp and paper production: It is employed in the manufacturing of bleach plants, digesters, and other equipment in the pulp and paper industry due to its resistance to corrosive chemicals and high-temperature performance.
4. Waste treatment: Hastelloy C-276 is used in waste treatment facilities for handling corrosive chemicals and acidic solutions, where its corrosion resistance is crucial.
5. Pharmaceutical industry: It finds applications in the production of pharmaceutical equipment and components that require resistance to corrosive chemicals and sanitizing agents.
6. Aerospace and marine applications: Hastelloy C-276 is utilized in components exposed to corrosive environments in aerospace and marine applications, such as in aircraft ducting systems, seawater cooling systems, and marine exhaust systems.
Specifications for Hastelloy C-276 include the following:
|
Bar, Rod and wire |
Seamless Pipe and Tube |
Welded Pipe and Tube |
Plate, Sheet, and Strip |
Forgings |
Fittings |
|
ASTM B 574/ASME SB 574 |
ASTM B 622 / ASME SB 622 |
ASTM B 626 /ASME SB 626, ASTM B 619 / ASME SB 619 |
ASTM B 575/ASME SB 575 |
ASTM B 564 /ASME SB 564, B472/SB472, B462/SB462 |
ASTM B 366/ASME SB 366 |
Standard product forms of Hastelloy C-276 are pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire. The products are available in a wide variety of sizes. Please contact us at sales@cocessalloys.com for full information.
