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In spite of the fact that Hastelloy is available in many versions, it is a nickel-based metal. In various industries, Hastelloy C276 SB575 4mm Thick Plate is the most common alloy. Flat plates made of alloy 2.4819 C276 are commonly used in areas subject to extreme conditions. Haynes Alloy C276 N10276 Polished Plate is therefore used in a wide variety of industries, including pulp and paper manufacturing, chemical refining, emissions control, industrial and residential waste disposal, and sour natural gas recovery.

Hastelloy C276 Sheet is widely used in a variety of industries, such as petrochemicals, chemical oil and gas, power production, pharmaceuticals, pulp and paper processing, and wastewater treatment. Hastelloy C276 Coil is highly resistant to matching, stress degradation, and oxidation. ASME SB 575 UNS N10276 content is often resistant to salt water corrosion in crevice environments, which may trigger aggressive attack in other products that are used in large quantities. A plate of UNS N10276 is usually heat treated at 2050 degrees Fahrenheit and quenched easily hastelloy c276 equivalent material, hastelloy specifications, c276 stainless steel.

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What Is Hastelloy C276 Plate?

Hastelloy C-276 UNS N10276 Cold Rolled Plate must meet both the chemical specifications as well as the mechanical requirements outlined in ASTM B575 norms when it comes to manufacturing materials. A Hastelloy C276 Plate must have tensile properties that are required for its mechanical properties. The alloy comes in foils, sheets, strips, clad plates, coils, and other shapes and sizes.

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Alloy C-276

With a small addition of tungsten, alloy C-276 (UNS N10276) is an austenitic nickel-molybdenum chromium alloy. It is one of the premier corrosion-resistant materials available for process industries. Both oxidizing and reducing environments are corrosion resistant to alloy C-276. Alloy C-276 is highly resistant to chloride stress corrosion cracking, pitting, crevice corrosion, and general corrosion due to its high molybdenum and chromium content and the addition of tungsten. However, C-276 lacks sufficient chromium content to operate effectively in highly oxidizing environments, such as hot, concentrated nitric acid, even at 1900°F (1038°C). Because of its low carbon content, Alloy C-276 is capable of being used as-welded. It cannot be hardened by heat treatment, but it can be hardened by cold working. The alloy has a higher work-hardening rate than austenitic stainless steel, so fabrication practices for austenitic stainless steel and nickel-based alloys should be used when welding and processing Alloy C-276.

Corrosion Resistance Alloy C-276

One of the most corrosion-resistant materials is corrosion-resistant alloy C-276 which performs exceptionally well in both oxidizing and reducing environments. In addition to resisting chloride stress corrosion cracking, pitting, crevice corrosion, and general corrosion, the alloy is also resistant to carbide precipitation during welding, so it can be used as-welded. Chemical processing applications use the alloy to resist sulfuric, hydrochloric, formic, acetic, and phosphoric acids. Chlorine gas, hypochlorite, and chlorine dioxide solutions in acetic anhydride, acid chlorides, and solvents can all be absorbed by the alloy. It is one of the few grades that can withstand concentrated solutions of oxidizing salts like iron and copper chloride. It also performs well in seawater, especially under crevice conditions were other frequently used alloys such as stainless steel, Alloy 400, and Alloy 625 fail. The operating conditions of flue gas desulfurization systems offer a challenging environment for corrosion-resistant materials. It has been shown that alloy C-276 withstands higher chloride levels than other grades before localized corrosion begins to occur. It is common for scrubber liquors and gas condensates to contain chlorides. Alloy C-276 is used extensively in the recovery and processing of sour natural gas which contains hydrogen sulfide along with carbon dioxide and chlorides. Stress corrosion cracking and sulfide stress cracking are the most common causes of failure for carbon and alloy steels in this corrosive environment. The rich chemistry of Alloy C-276 makes it resistant to sour environments even at high temperatures in deep wells.

Fabrication Data Alloy C-276

Fabrication Data Alloy C-276 can be easily welded and processed utilizing standard shop fabrication practices for austenitic stainless steels and nickel-based alloys. Hot Forming The hot-working temperature range for Alloy C-276 is 1600–2250°F (870–1230°C). 

After hot working, it is recommended to give the alloy a water quench to ensure maximum corrosion resistance. Later, heat treatment is also recommended to ensure maximum corrosion resistance. 

Cold Forming Alloy C-276 should be in the annealed condition for cold working. The alloy has a higher work hardening rate than the austenitic stainless steels which should be taken into consideration. With a high degree of cold working, an in-process anneal may be necessary. If the alloy undergoes greater than 15% deformation during cold working, a solution anneals may be necessary. Welding Alloy C-276 can be readily welded by most standard processes including GTAW (TIG), PLASMA, GMAW (MIG/MAG), and SMAW (MMA). Post-weld heat treatment is not necessary. It is recommended to use a stainless steel wire brush after welding to remove the heat tint and prevent the need for additional pickling. A machined alloy should be annealed before it is machined. Since Alloy C-276 is prone to work–hardening, only low cutting speeds should be used and the cutting tool should be engaged at all times. Adequate cut depth is necessary to assure avoid contact with the previous.

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ASTM B575 Alloy C276 Sheet, Plate & Foil Difference

  • Plates with a thickness greater than 6.35 mm are called Hastelloy C276 plates.
  • Foils with a thickness less than 0.15mm are called Hastelloy C276 Foils.
  • A Hastelloy C276 Sheet is a sheet with a thickness greater than 0.15 mm but less than 6.35 mm.

Features Of Din 2.4819 Plate

  • In reducing environments, this material is extremely corrosion resistant
  • Few materials can withstand the corrosive effects of wet chlorine gas, hypochlorite, and chlorine dioxide
  • Excellent resistance to strong solutions of oxidizing salts, such as ferric and cupric chlorides
  • Localized corrosion resistance, such as pitting and stress corrosion cracking
  • To maintain corrosion resistance in heat-affected zones of welds, low carbon content prevents carbide precipitation at grain boundaries during welding
  • It is corrosion resistant in reducing environments due to its high nickel and molybdenum content

Uses Of UNS N10276 Plate

  • Catalyst equipment for halide or acid processes.
  • In the paper industry, digesters and bleach plants are used.
  • Desulfurization equipment for flue gas.
  • Reactors for sulfuric acid.
  • In sulfuric acid environments, evaporators, heat exchangers, filters, and mixers are used.
  • The components exposed to sour gas.
  • Equipment for the production of organic chlorides.
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