Hastelloy C276/C22 (UNS N10276/N06022) for electric power industry are the industry-leading nickel-chromium-molybdenum-tungsten superalloys, engineered to solve the most severe corrosion challenges in power generation. C276 excels in reducing environments with high chloride content, while C22 offers superior performance in oxidizing and mixed-acid conditions, making them the gold standard for flue gas desulfurization (FGD), waste-to-energy and nuclear power applications.
As the only alloys that can reliably withstand the combined attack of sulfuric acid, hydrochloric acid, hydrofluoric acid and chlorides in power plant exhaust systems, both alloys require no post-weld heat treatment to maintain full corrosion resistance. With over 20 years of production experience, Emily PIPE supplies precision-manufactured Hastelloy C276/C22 seamless pipes, tubes and bars that meet the strictest international power industry standards.
| Item | Details |
|---|---|
| Executive Standards | 1. International Material Standards: ASTM B622/B574 (C276), ASTM B619/B574 (C22), ASME SB622/SB574
2. Power Piping Standards: ASME B31.1 (Power Piping), ASME B31.3 3. Nuclear Power Standards: ASME Section III, NQA-1 4. Pressure Vessel Standards: ASME Section I (Power Boilers), ASME Section VIII Div.1 5. Testing Standards: ASTM E8, ASTM G48 (Pitting/Crevice), ASTM E243 (Eddy Current) |
| Material Grade | 1. Hastelloy C276 (UNS N10276): W.Nr.2.4819, NiMo16Cr15W
2. Hastelloy C22 (UNS N06022): W.Nr.2.4602, NiCr21Mo14W 3. Equivalent Grades: NS3304/NS3308 (China), Hastelloy C276/C22 (USA) 4. Special Grades: Nuclear grade; heavy-wall grade; precision ground grade |
| Chemical Composition (Weight %) | C276: Ni≥57, Cr14.5-16.5, Mo15.0-17.0, W3.0-4.5, Fe4.0-7.0, C≤0.010
C22: Ni≥56, Cr20.0-22.5, Mo12.5-14.5, W2.5-3.5, Fe2.0-6.0, C≤0.015 Note: Higher Cr in C22 improves oxidizing resistance; higher Mo/W in C276 enhances reducing acid resistance |
| Mechanical Properties (Annealed State) | C276: Tensile 690-900MPa, Yield≥310MPa, Elongation≥40%, HB180-230
C22: Tensile 690-930MPa, Yield≥310MPa, Elongation≥40%, HB180-235 High-Temp (650℃): Both maintain ≥480MPa tensile strength Max Service Temp: 650℃ continuous |
| Dimensional Tolerance | 1. Seamless Pipes/Tubes: Ø6-50mm±0.15mm; Ø50-150mm±0.3mm; Wall±0.08-0.12mm
2. Bars/Rods: Ø6-50mm±0.3mm; Ø50-150mm±0.5mm; Ø150-300mm±0.8mm 3. U-Bend Tubes: Bend radius±0.5mm; Ovality≤3% of OD 4. Length Tolerance: ±2mm (1-12m); custom lengths up to 18m |
| Why This Material Is Used in Electric Power Industry | 1. Unmatched FGD System Corrosion Resistance:
– Withstands the “corrosion cocktail” of H₂SO₄, HCl, HF and chlorides in flue gas scrubbers – C276: Preferred for scrubber slurry zones (chloride>500ppm, 80-100℃) with superior erosion-corrosion resistance – C22: Ideal for stack liners and mist eliminators (oxidizing conditions, >100℃) – Corrosion rate <0.1mm/year vs. >5mm/year for 316L stainless steel 2. Superior Waste-to-Energy Performance: – Resists high-temperature acidic gases (HCl, SO₂, HF) from municipal solid waste combustion – C22 outperforms C276 in oxidizing flue gases above 150℃ – Eliminates frequent tube failures that cause unplanned plant shutdowns 3. Proven Nuclear Power Reliability: – ASME Section III certified for nuclear reactor auxiliary systems – Excellent resistance to boric acid, radioactive wastewater and hydrogen embrittlement – Used in steam generator secondary sides and radioactive waste treatment systems 4. Excellent Seawater Cooling Resistance: – Immune to chloride-induced SCC in seawater and concentrated brine – Resists biofouling and erosion-corrosion in coastal power plant cooling systems 5. Superior Cost-Effectiveness: – While initial cost is 5-8x higher than 316L, 10-20x longer service life reduces total cost of ownership by 60-70% – Eliminates costly annual maintenance and replacement of stainless steel components |
| Application Scenarios and Corresponding Customers | 1. Flue Gas Desulfurization (FGD) Systems:
– Applications: Scrubber spray headers, slurry piping, mist eliminator supports, stack liners, heat exchanger tubes – Customers: GE Power, Siemens Energy, Mitsubishi Heavy Industries, State Grid, China Energy Investment 2. Waste-to-Energy and Biomass Power: – Applications: Boiler superheater tubes, flue gas piping, scrubber internals, heat exchanger tubes – Customers: Babcock & Wilcox, Hitachi Zosen, China Everbright Environment, Shanghai Electric 3. Nuclear Power Generation: – Applications: Chemical and volume control systems, radioactive waste piping, heat exchanger tubes, fastener components – Customers: Westinghouse, Areva, Rosatom, China National Nuclear, China General Nuclear 4. Gas Turbine Combined Cycle: – Applications: HRSG acid dew point components, flue gas piping, heat exchanger tubes – Customers: General Electric, Siemens, Mitsubishi Heavy Industries, Ansaldo Energia 5. Coastal Power Plant Cooling: – Applications: Seawater intake piping, heat exchanger tubes, condenser tubes, cooling water systems – Customers: DuPont Water Solutions, Veolia, SUEZ, local power generation groups |
| Customer Requirements in This Industry | 1. Performance Requirements:
– Mixed Acid Resistance: Must withstand H₂SO₄+HCl+HF+chloride combinations – Localized Corrosion Resistance: Must be immune to pitting, crevice corrosion and SCC – Erosion-Corrosion Resistance: Must resist slurry impingement in FGD scrubbers – Radiation Resistance: Must withstand neutron radiation in nuclear applications – Thermal Fatigue Resistance: Must withstand cyclic heating and cooling 2. Quality and Compliance Requirements: – ASME Code Compliance: Must meet ASME Section I, III and B31.1 requirements – NACE Certification: Must provide NACE MR0175 certification for sour service – Nuclear Quality Assurance: Must comply with NQA-1 for nuclear applications – Full Traceability: Must provide 100% traceability from raw material to finished product – Third-Party Inspection: Must allow inspection by TÜV, SGS, BV or authorized organizations 3. Manufacturing Requirements: – Precision Dimensional Tolerances: Must meet tight tolerances for proper fit and assembly – Surface Quality: Must have smooth, defect-free surfaces to prevent corrosion initiation – Internal Quality: Must be free from inclusions, porosity and segregation (100% UT/ET verified) – Consistent Quality: Must have uniform chemical composition across all batches – Cleanliness Requirements: Must meet strict cleanliness standards for nuclear applications |
| Common Related Products in This Industry | 1. Hastelloy C276/C22 Seamless Pipes/Tubes: For high-pressure process piping and heat exchangers
2. Hastelloy C276/C22 Welded Pipes: Cost-effective for large-diameter FGD and flue gas piping 3. Hastelloy C276/C22 Bars/Rods: For manufacturing fasteners, valve stems, shafts and structural components 4. Hastelloy C276/C22 Fittings: Elbows, tees, reducers, flanges and couplings for power plant piping systems 5. Hastelloy C276/C22 Forgings: Custom forgings including valve bodies, pump casings and header components 6. Hastelloy C276/C22 Fasteners: Bolts, nuts, screws, studs and washers for severe corrosion service 7. Hastelloy C276/C22 Welding Materials: ERNiCrMo-4 (C276) and ERNiCrMo-10 (C22) electrodes/wires 8. Hastelloy C276/C22 Sheets and Plates: For manufacturing scrubber liners, tanks and vessels 9. Hastelloy C276/C22 Machined Components: Precision-machined valves, fittings and heat exchanger parts 10. Custom Fabricated Assemblies: Pre-fabricated FGD spray headers and piping spools |
| Why Choose Us (Emily PIPE) | 1. 20+ Years of Power Industry Alloy Expertise: We have supplied Hastelloy products to over 100 power plants worldwide
2. NACE & ASME Nuclear Certified Facility: Our production line meets the strictest nuclear quality standards 3. Full-Process Quality Control: We implement 100% ultrasonic, eddy current and hydrostatic testing on all products 4. Complete International Certifications: Our products hold ASTM, ASME, PED, NACE and nuclear certifications 5. Advanced Customization Capability: We can produce custom sizes, lengths and end processing per your drawings 6. Global Power Supply Chain Experience: We have extensive experience delivering to major power companies worldwide 7. Professional Technical Support: Our metallurgical engineers provide expert material selection guidance 8. One-Stop Solution: We provide complete solutions from raw material supply to pre-fabricated assemblies |
| Supplementary Industry Information | 1. Comprehensive Test Reports: Each batch comes with a full MTR including chemical analysis, mechanical properties and NDT results. Corrosion test reports available upon request
2. Full Material Traceability: Every product has a unique heat number and complete traceability documentation 3. Value-Added Processing: We offer precision cutting, CNC bending, welding, end processing and surface finishing 4. Prototype Development Support: We support small batch prototype orders with fast turnaround times 5. Emergency Response Service: We provide 24/7 emergency service for unplanned power plant shutdowns 6. Market Growth: The global Hastelloy market for power generation is projected to grow at a CAGR of over 7% through 2030, driven by stricter environmental regulations 7. Sustainability Commitment: All our products are manufactured using sustainable practices and are 100% recyclable |
| Packaging | 1. Plastic Caps: All pipe/bar ends are protected with heavy-duty polyethylene caps with internal sealing rings
2. Waterproof Film: Each product is individually wrapped in waterproof and anti-corrosion film 3. Bundle Packing: Products of the same size are bundled with steel straps and wooden spacers 4. Wooden Case: Bundles are packed in sturdy fumigated wooden cases with steel reinforcement 5. Export Standard Packing: All packaging complies with international export standards and ISPM 15 regulations 6. Marking: Each package is clearly marked with product specifications, heat number, quantity and destination |
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