Views: 3 Author: Site Editor Publish Time: 2025-06-24 Origin: Site
Hastelloy C276 belongs to the nickel-molybdenum-chromium-iron-tungsten series of nickel-based alloys, and is one of the most corrosion-resistant modern metal materials. It is strengthened by solid solution and a small amount of tungsten is added. Its high molybdenum content can effectively prevent local corrosion, including pitting. It is mainly resistant to wet chlorine, various oxidizing chlorides, chloride salt solutions, sulfuric acid and oxidizing salts, and has good corrosion resistance in low and medium temperature hydrochloric acid. In addition, the low carbon content prevents the formation of carbides during welding, thereby maintaining its resistance to intergranular corrosion in the heat-affected zone of the welded joint. In addition, Hastelloy C276 has good ductility and is easy to form and weld. Therefore, in the past three decades, it has been widely used in harsh corrosive environments such as chemical, petrochemical, flue gas desulfurization, pulp and paper, environmental protection and other industrial fields. Contact us
Specifications | ASTM B 622 |
Dimensions | ASTM, ASME and API |
Size | 15″NB TO 150″NB IN |
Specialized in | Large Diameter Size |
Schedule | SCH5, SCH10, SCH40, STD, SCH80, SCH160 |
Type | Seamless / ERW / Welded / Fabricated |
Form | Round, Hydraulic Etc |
Length | Single Random, Double Random & Cut Length. |
End | Plain End, Beveled End, Treaded |
Excellent corrosion resistance: In oxidizing and reducing environments, it has extremely high resistance to most corrosive media, can resist pitting, crevice corrosion and stress corrosion cracking, especially in chloride-containing environments, and is suitable for harsh corrosive environments such as marine engineering and chemical production.
Good high-temperature strength: It has a high melting point and excellent creep strength, and can maintain good mechanical properties at high temperatures. It can be used for parts that work at high temperatures for a long time, such as heat exchangers, furnace parts, etc.
Excellent welding performance: It can be processed through a variety of welding techniques, and the mechanical properties after welding change little, which is very advantageous in the manufacture of large structural parts and maintenance work.
Good oxidation resistance: In a high-temperature oxidizing environment, a protective oxide film can be formed to prevent further oxidation of the material and maintain the stability and performance of the alloy at high temperatures.
High hardness and wear resistance: Hastelloy C276 pipe has a high hardness and good wear resistance, which makes it perform well in some applications that need to resist wear and erosion, such as fluid transportation pipelines with severe wear.
Material | Ni | Mo | Cr | Fe | W | Co | Mn | C | Si | V | P | S |
N10276 | Remainder | 15.0-17.0 | 14.5-16.5 | 4.00-7.00 | 3.00-4.50 | 2.50max | 1.00max | 0.01max | 0.08 | 0.35 | 0.04 | 0.03 |
Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
8.89 g/cm3 | 1370 °C (2500 °F) | 41(283) min | 100(690) min | 40% |
STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST |
Hastelloy C276 | N10276 | 2.4819 | – | NiMo16Cr15W | NW 0276 | – | ХН65МВУ |
Alloy C276 is suitable for various chemical process industries containing oxidizing and reducing media. The higher content of molybdenum and chromium makes the alloy resistant to chloride ion corrosion, and tungsten further improves its corrosion resistance. Hastelloy C276 pipe is one of the only materials that can resist corrosion from moist chlorine, hypochlorite and chlorine dioxide solutions. The alloy has significant corrosion resistance to high concentration chloride solutions (such as ferric chloride and cupric chloride).
(1) The hot working temperature range of Hastelloy C-276 is 1200℃～950℃, and the cooling method is water cooling or rapid air cooling.
(2) To ensure the best anti-corrosion performance, heat treatment should be carried out after hot working, and the workpiece should be directly added to the heated heat treatment furnace.
(1) The work hardening rate of Hastelloy C276 pipe is greater than that of austenitic stainless steel, so the processing equipment needs to be selected. The workpiece should be in the solution heat treatment state, and there should be intermediate annealing during the cold rolling process.
(2) If the cold rolling deformation is greater than 15%, the workpiece needs to be subjected to secondary solution treatment.
(1) The solution treatment temperature range of Hastelloy C276 is 1100℃～1160℃.
(2) The cooling method is water quenching. Materials with a thickness of less than 1.5mm can also use rapid air cooling. If air cooling is used, it should be cooled from 1000℃ to 600℃ within 2 minutes.
Nominal Pipe Size,in. | Outside Diameter | Schedule No.10 | Nominal Wall Thickness | Schedule No.80 |
Inches | ||||
1/4 | 0.540 | 0.065 | 0.088 | ... |
3/8 | 0.675 | 0.065 | 0.091 | 0.126 |
1/2 | 0.840 | 0.083 | 0.109 | 0.147 |
3/4 | 1.050 | 0.083 | 0.113 | 0.154 |
1 | 1.315 | 0.109 | 0.133 | 0.179 |
1 1/4 | 1.660 | 0.109 | 0.140 | 0.191 |
1 1/2 | 1.900 | 0.109 | 0.145 | 0.200 |
2 | 2.375 | 0.109 | 0.154 | 0.218 |
2 1/2 | 2.875 | 0.120 | 0.203 | 0.276 |
3 | 3.500 | 0.120 | 0.216 | 0.300 |
Millimeters | ||||
1/4 | 13.72 | 1.65 | 2.24 | ... |
3/8 | 17.14 | 1.65 | 2.31 | 3.20 |
1/2 | 21.34 | 2.11 | 2.77 | 3.73 |
3/4 | 26.67 | 2.11 | 2.87 | 3.91 |
1 | 33.40 | 2.77 | 3.38 | 4.55 |
1 1/4 | 42.16 | 2.77 | 3.56 | 4.85 |
1 1/2 | 48.26 | 2.77 | 3.68 | 5.06 |
2 | 60.32 | 2.77 | 3.91 | 5.54 |
2 1/2 | 73.02 | 3.05 | 5.16 | 7.04 |
3 | 88.90 | 3.05 | 5.49 | 7.62 |
Chemical and petrochemical industry: used to manufacture reactors, heat exchangers, distillation towers, scrubbers, storage tanks and transmission pipelines, handling various strong acids, alkalis and salt solutions.
Pollution control: used to handle corrosive flue gases in flue gas desulfurization (FGD) systems, such as chimney linings, pipes, baffles, scrubbers, flue gas reheaters and fan housings.
Pulp and paper industry: used in areas such as bleaching plants and pulp digesters to resist corrosive chemicals.
Pharmaceutical industry: in applications with strict requirements on cleanliness and product purity, such as reactors, storage tanks and piping systems.
Waste treatment: used to treat corrosive wastewater and in incineration facilities.
Oil and gas industry: in environments with high pressure, high temperature and corrosive fluids, such as equipment on offshore platforms, refineries and petrochemical plants.
Energy industry: in coal-fired and nuclear power plants, used for components such as boilers, heat exchangers and condensers.
-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)
-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )
-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)
-Round bar , Billet (ASTM A276, ASTM A479)
- Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)
-Bolting, Nuts（ASTM A193, A194, A320）
We Export Hastelloy C276 Pipe to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc
1. What is the ASTM standard for Hastelloy C276 pipe?
For Hastelloy C276 pipes, the primary ASTM standard is ASTM B622, which specifically covers seamless pipe and tube made from Nickel - Molybdenum - Chromium alloys (including UNS N10276, or Hastelloy C276). Additionally, ASTM B619 is the standard specification for welded pipe of these same alloys, while ASTM B626 covers welded tube, ensuring that both seamless and welded forms of Hastelloy C276 piping adhere to stringent quality and performance criteria for their respective applications.
2. What is the difference between C276 and ss316?
The core difference between Hastelloy C276 and SS316 (316 stainless steel) lies in their chemical composition and, consequently, their level of corrosion resistance and cost. SS316 is an austenitic stainless steel with good general corrosion resistance, especially to chlorides, thanks to its molybdenum content (typically 2-3%). However, Hastelloy C276 is a nickel-molybdenum-chromium superalloy with significantly higher amounts of nickel (around 57%), molybdenum (15-17%), and chromium (14.5-16.5%), plus tungsten. This enriched composition gives Hastelloy C276 superior resistance to a much wider range of extremely aggressive corrosive environments, including strong acids, wet chlorine gas, and severe pitting and crevice corrosion, where SS316 would likely fail.
3. What is the difference between Hastelloy C22 and Hastelloy C276?
While Hastelloy C22 and Hastelloy C276 are both corrosion-resistant nickel-chromium-molybdenum high-temperature alloys, their main difference lies in the chemical composition optimized for different corrosive environments. Compared with C276, Hastelloy C22 has a higher chromium content (about 22%) and a slightly lower molybdenum content, which makes it perform well in strongly oxidizing conditions and has enhanced resistance to pitting, crevice corrosion and stress corrosion cracking, especially in mixed oxidant environments. Conversely, Hastelloy C276 has a slightly lower chromium content (about 16%) but a higher molybdenum content (about 16%), and has excellent corrosion resistance in a wider range of oxidizing and strongly reducing environments, including wet chlorine, hypochlorites, and strong acids such as sulfuric and hydrochloric acids, and its versatility is highly respected.
