Description
Hastelloy C276 Sheets & Plates / Alloy C276 / UNS N10276
Hastelloy C276 Sheets & Plates, which is also sold as Nickel Alloy C276, is a nickel-molybdenum-chromium wrought alloy. Hastelloy C-276 is perfect for use in situations that demand protection from aggressive corrosion and localized corrosion attack. Finally, C276 is suitable for off-shore applications where hydrogen-sulphide(H2S) stress corrosion cracking resistance is essential.
In aggressive or corrosive environments when other alloys have failed, many companies have then turned to C276 alloy – one of the most corrosion resistant alloys on the market.
Industries where C276 is utilised are petrochemical and chemical processing, power generation, pharmaceutical, pulp and paper production and waste treatment to name a few.
The combination of the high molybdenum and chromium content, along with the addition of tungsten, make Alloy C276 highly resistant to
chloride stress corrosion cracking, pitting, crevice corrosion and general corrosion. Alloy C276 can operate in oxidizing atmospheres up to 1900°F (1038°C), however, the alloy lacks sufficient chromium content to operate successfully in the most strongly oxidizing environments like hot, concentrated nitric acid.
The low carbon content of Alloy C276 enables the alloy to be utilized in the as-welded condition. It cannot be hardened by heat treatment, but can be hardened by cold working. The alloy has a higher workhardening rate than the austenitic stainless steels which should be
taken into consideration. Alloy C276 can be easily welded and processed utilizing standard shop fabrication practices for austenitic stainless steels and nickel based alloys.
HASTELLOY® C-276 alloy is available in the form of plates, sheets, strips, billets, bars, wires, pipes, tubes, and covered electrodes.
Textron Steel & Alloys is Major Stockist & Supplier of Hastelloy C276 Sheets & Plates from reputed manufacturer all over the world.
Common Trade Names :
INCONEL® alloy C-276, Hastelloy® C-276 alloy
Hastelloy C-276 Applicable Specifications :
| Form | ASTM | ASME |
| Bar | B574, B564 | SB574, SB564 |
| Plate & Sheet | B575 | SB575 |
| Welded Pipe | B619 | SB619 |
| Welded Tube | B626 | SB626 |
| Seamless Pipe & Tube | B622 | SB622 |
Hastelloy C276 Chemical Composition of Nickel Alloy C276 :
| Element | Min | Max |
| Molybdenum | 15.00 | 17.00 |
| Chromium | 14.50 | 16.50 |
| Iron | 4.00 | 7.00 |
| Tungsten | 3.00 | 4.50 |
| Cobalt | – | 2.50 |
| Carbon | – | 0.02 |
| Silicon | – | 0.08 |
| Manganese | – | 1.00 |
| Vanadium | – | 0.35 |
| Phosphorus | – | 0.030 |
| Sulfur | – | 0.030 |
| Nickel | Remainder | |
Applications of Hastelloy C276 Sheets & Plates :
- • Air Pollution Control—flue gas desulfurization systems – stack liners, absorbers, ducts, dampers, stack gas re-heaters and fans
• Chemical Processing—heat exchangers, pressure vessels, tanks, evaporators, piping, flanges and fittings, pumps and valves
• Oil and Gas Production—sour gas service components
• Pharmaceutical Production—reactor vessels, piping, flanges and fittings, pumps and valves
• Pulp and Paper—bleaching vessels and digestors
• Waste Treatment—incinerators for toxic, industrial and municipal waste - • Digesters and bleach plants in the paper industry.
• Components exposed to sour gas.
• Equipment for flue-gas desulfurisation plants.
• Evaporators, heat exchangers, filters and mixers used in sulfuric acid environments.
Sulfuric acid reactors.
• Organic chloride process equipment.
• Equipment for processes utilizing halide or acid catalysts.
Corrosion Resistance :
Hastelloy C276 is one of the premier corrosion resistant materials that performs exceptionally well in both oxidizing and reducing environments. It resists chloride stress corrosion cracking, pitting, crevice and general corrosion. The
alloy is also resistant to carbide precipitation during welding enabling it to be utilized in the as-welded condition.
In chemical processing applications, the alloy has exceptional resistance to sulfuric, hydrochloric, formic, acetic and phosphoric acids. Alloy C276 performs well in environments containing acid chlorides, solvents and acetic
anhydride, The alloy is one of the few grades that withstands wet chlorine gas, hypochlorite and chlorine dioxide solutions.
Alloy C276 is highly resistant to concentrated solutions of oxidizing saltsincluding iron and copper chloride. It also performs well in seawater, especially under crevice conditions where 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. Scrubber liquors and gas condensates often contain chlorides. Alloy C276 has been shown to withstand higher chloride levels than other grades before the onset of localized corrosion in these systems.
Hastelloy C276 is used extensively in the recovery and processing of sour natural gas which contains hydrogen sulfide along with carbon dioxide and chlorides. Carbon and alloy steels cannot withstand this corrosive environment. They are subject to failure by sulfide stress cracking or stress corrosion cracking. The rich chemistry of Alloy C276 makes it resistant to sour environments even at high temperatures in deep wells.
Fabrication Data :
Alloy C276 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 C276 is 1600–2250°F (870–1230°C). The alloy should be water quenched after hot working. Heat treatment is recommended after hot working to ensure maximum corrosion resistance.
Cold Forming
Alloy C276 should be in the annealed condition for cold working. The alloy has a higher workhardening rate than the austenitic stainless steels which should be taken into consideration. An in-process anneal may be necessary with a high degree of cold working. If the alloy undergoes greater than 15% deformation during cold working, a solution anneal may be necessary.
Welding of Hastelloy C276 :
Alloy C276 can be readily welded by most standard processes including GTAW (TIG), PLASMA, GMAW (MIG/MAG) and SMAW (MMA). A post weld heat treatment is not necessary. Brushing with a stainless steel wire brush after welding will remove the heat tint and produce a surface area that does not require additional pickling.
Machining of Hastelloy C276 :
Hastelloy C276 should preferably be machined in the annealed condition. Since Alloy C276 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 avoiding contact with the previously formed work-hardened zone.
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Cities We can Supply our Hastelloy C276 Sheets & Plates to :
Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Chhattisgarh, Goa, Gujarat, Haryana, Himachal Pradesh, Jammu and Kashmir, Jharkhand, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Manipur, Meghalaya, Mizoram, Nagaland, Odisha, Punjab, Rajasthan, Sikkim, Tamil Nadu, Telangana, Tripura, Uttar Pradesh, Uttarakhand, West Bengal, Hyderabad, Itanagar, Dispur, Patna, Raipur, Panaji, Gandhinagar, Chandigarh, Shimla, Srinagar, Jammu , Ranchi, Bengaluru, Thiruvananthapuram, Bhopal, Mumbai, Imphal, Shillong, Aizawl, Kohima, Bhubaneswar, Chandigarh, Jaipur, JajPur, Gangtok, Chennai, Agartala, Lucknow, Dehradun, Kolkata, Visakhapatnam, Vijayawada, Guntur, Nellore and Tirupati, Visakhapatnam, Vijayawada, Guntur, Nellore and Tirupati, Guwahati, Tezpur, Dibrugarh, Silchar and North Lakhimpur, Gaya, Biharsharif, Darbhanga and Bhagalpur, Bilaspur, Korba, Durg-Bhilainagar, Raigarh and Rajnandgaon, Vasco-da-Gama, Ponda, Margao, Mapusa and Goa Velha, Ahmedabad, Surat, Rajkot, Junagadh and Vadodara, Faridabad, Gurgaon, Sonipat, Panipat and Ambala, Dharamshala, Mandi, Solan, Bilaspur and Chamba, Anantnag, Leh, Udhampur, Ramnagar and Baramulla, Bokaro Steel City, Jamshedpur, Deoghar, Hazaribagh and Dhanbad, Mysore, Davangere, Mangalore, Hubli-Dharwad and Belgaum, Kochi, Kozhikode, Thrissur and Malappuram, Indore, Gwalior, Jabalpur, Ujjain and Sagar, Pune, Nagpur, Nashik, Aurangabad and Solapur, Bishnupur, Ukhrul, Tamenglong, Chandel and Senapati, Cherrapunji, Tura, Jowai, Baghmara and Nongpoh, Lunglei, Serchhip, Champhai, Tuipang and Mamit, Tuensang, Zunheboto, Mokokchung, Kiphire Sadar and Phek, Rourkela, Cuttack, Brahmapur, Puri and Sambalpur, Amritsar, Jalandhar, Ludhiana, Patiala and Kapurthala, Bikaner, Jaisalmer, Jodhpur, Udaipur and Ajmer, Bikaner, Jaisalmer, Jodhpur, Udaipur and Ajmer, Tiruchirappalli, Madurai, Erode, Vellore and Coimbatore, Warangal, Nizamabad, Karimnagar, Adilabad and Khammam, Warangal, Nizamabad, Karimnagar, Adilabad and Khammam, Noida, Varanasi, Allahabad, Agra and Kanpur, Haridwar, Roorkee, Rishikesh, Kashipur and Haldwani, Darjeeling, Siliguri, Asansol, Howrah and Durgapur, Andaman and Nicobar Islands, Chandigarh, Dadra and Nagar Haveli, Daman and Diu, Lakshadweep, NCT of Delhi, Puducherry, Port Blair, Chandigarh, Silvassa, Daman, Kavaratti, New Delhi.
INCONEL® is a registered trademark of the Special Metals Corporation group of companies.
HASTELLOY® is a registered trademark of Haynes International Inc.