Alloy 800/800H For Electric power

2. Nuclear Power Standards: ASME Section III, NQA-1

3. Power Piping Standards: ASME B31.1 (Power Piping), ASME B31.3

4. Pressure Vessel Standards: ASME Section I (Power Boilers), ASME Code Case 2225 (800H)

5. Testing Standards: ASTM E8, ASTM E139 (Creep), ASTM G54 (Oxidation), ASTM E243 (Eddy Current)

2. Alloy 800H (UNS N08810): Creep-optimized grade (0.05-0.10% C, ASTM grain size ≥5)

3. Alloy 800HT (UNS N08811): Maximum creep grade (0.06-0.10% C, Al+Ti 0.85-1.20%)

4. Equivalent Grades: NS1101/NS1102 (China), Incoloy 800/800H (USA), Nicrofer 3221 (Germany)

2. Chromium (Cr): 19.0-23.0 (primary element for oxidation and carburization resistance)

3. Iron (Fe): Balance (≥39.5%, improves formability and reduces cost)

4. Carbon (C): ≤0.10 (800); 0.05-0.10 (800H); 0.06-0.10 (800HT)

5. Aluminum (Al): 0.15-0.60 (800/800H); 0.85-1.20 (800HT, combined with Ti)

6. Titanium (Ti): 0.15-0.60 (800/800H)

7. Manganese (Mn): ≤1.50

8. Silicon (Si): ≤1.00

9. Sulfur (S): ≤0.015

1. Tensile Strength (RT): 515-690 MPa

2. 0.2% Yield Strength (RT): ≥205 MPa

3. Elongation (δ5): ≥40%

Alloy 800H:

1. Tensile Strength (RT): 450-650 MPa

2. 0.2% Yield Strength (RT): ≥170 MPa

3. Elongation (δ5): ≥35%

High-Temperature Properties (800H):

1. Tensile Strength (700℃): ≥180 MPa

2. Creep Rupture Strength (700℃, 10,000h): ≥45 MPa

3. Maximum Continuous Service Temperature: 900℃

2. Bars/Rods: Ø6-50mm ±0.3mm; Ø50-150mm ±0.5mm; Ø150-300mm ±0.8mm

3. U-Bend Tubes: Bend radius ±0.5mm; Ovality at bend ≤3% of OD

4. Length Tolerance: ±2mm (1-12m); custom lengths up to 18m available

– Controlled carbon content and coarse grain structure provide superior creep resistance

– 900℃, 100MPa stress: 1000-hour creep rate only 0.03%, 1/4 of 310S stainless steel

– Maintains structural integrity for 30+ years in continuous high-temperature operation

2. Superior High-Temperature Steam Oxidation Resistance:

– Forms a dense, adherent Cr₂O₃/Al₂O₃ composite oxide layer that resists spalling

– Mass loss <0.15g/m² after 1000 hours at 900℃ in static air

– Outperforms 310S by 50% in high-pressure steam environments

3. Excellent Chloride SCC Resistance:

– 30-35% nickel content provides excellent resistance to chloride-induced stress corrosion cracking

– Resists cracking in boiler water containing up to 500 ppm chloride at 300℃

– Ideal for supercritical boiler tubes where chloride contamination is a risk

4. Outstanding Flue Gas Corrosion Resistance:

– Excellent resistance to sulfidation and carburization in combustion gas environments

– Good resistance to hydrogen chloride and other acidic gases in waste-to-energy plants

– Outperforms carbon steel and low-alloy steels by 10-20 times in corrosive flue gases

5. Exceptional Thermal Stability:

– No harmful σ-phase precipitation below 850℃ after long-term exposure

– Retains ductility and toughness even after 100,000 hours of service at 700℃

– Excellent thermal fatigue resistance during cyclic heating and cooling

– Applications: Supercritical/ultra-supercritical boiler superheater tubes, reheater tubes, main steam pipes, header tubes, heat exchanger tubes

– Customers: GE Power, Siemens Energy, Mitsubishi Heavy Industries, State Grid Corporation, China Energy Investment Corporation

2. Nuclear Power Generation:

– Applications: CANDU and PWR steam generator tubes, reactor internals, control rod drive mechanisms, heat exchanger tubes, piping systems

– Customers: Westinghouse, Areva, Rosatom, China National Nuclear Corporation, China General Nuclear Power Group

3. Waste-to-Energy and Biomass Power:

– Applications: Boiler superheater tubes, reheater tubes, flue gas treatment piping, heat exchanger tubes, combustion chamber components

– Customers: Babcock & Wilcox, Hitachi Zosen, China Everbright Environment, Shanghai Electric

4. Gas Turbine Combined Cycle:

– Applications: Heat recovery steam generator (HRSG) superheater tubes, reheater tubes, exhaust ducts, transition pieces

– Customers: General Electric, Siemens, Mitsubishi Heavy Industries, Ansaldo Energia

5. Concentrated Solar Power (CSP):

– Applications: Molten salt storage tank piping, heat exchanger tubes, receiver tubes, process piping

– Customers: Abengoa Solar, BrightSource Energy, Shanghai Electric, China General Nuclear Power Group

– Creep Strength: Must maintain sufficient creep resistance at operating temperatures up to 900℃

– Oxidation Resistance: Must resist oxidation and scaling in high-pressure steam and flue gas environments

– Corrosion Resistance: Must resist chloride SCC and flue gas corrosion

– Thermal Fatigue Resistance: Must withstand cyclic heating and cooling without cracking

– Radiation Resistance: Must withstand neutron radiation in nuclear power plant applications

2. Quality and Compliance Requirements:

– ASME Code Compliance: Must meet all requirements of ASME Section I, Section III and B31.1

– Nuclear Quality Assurance: Must comply with NQA-1 quality assurance requirements for nuclear applications

– Full Traceability: Must provide 100% traceability from raw material ore to finished product

– Material Certification: Must provide comprehensive MTRs including chemical analysis, mechanical properties and creep test results

– Third-Party Inspection: Must allow inspection by TÜV, SGS, BV or other authorized organizations

3. Manufacturing Requirements:

– Precision Dimensional Tolerances: Must meet tight tolerances for proper fit and assembly of boiler components

– Surface Quality: Must have a smooth, defect-free surface to prevent oxidation initiation

– Internal Quality: Must be free from inclusions, porosity and segregation (100% UT/ET verified)

– Consistent Quality: Must have uniform chemical composition and grain size across all batches

– Heat Treatment Control: Must undergo proper solution annealing to achieve required grain size and properties

2. Alloy 800/800H U-Bend Tubes: Custom bent tubes for nuclear steam generators and power plant heat exchangers

3. Alloy 800/800H Bars/Rods: Used for manufacturing fasteners, valve stems, shafts and structural components

4. Alloy 800/800H Fittings: Elbows, tees, reducers, flanges and couplings for power plant piping systems

5. Alloy 800/800H Forgings: Custom forgings including valve bodies, pump casings and header components

6. Alloy 800/800H Fasteners: Bolts, nuts, screws, studs and washers for high-temperature service

7. Alloy 800/800H Welding Materials: Electrodes, wires and filler metals for power plant welding applications

8. Alloy 800/800H Sheets and Plates: Used for manufacturing boiler components, tanks and vessels

9. Alloy 800/800H Machined Components: Precision-machined valves, fittings and heat exchanger parts

10. Custom Fabricated Assemblies: Pre-fabricated piping spools and heat exchanger bundles

2. ASME Nuclear Certified Production Facility: Our production line is fully certified to ASME Section III and NQA-1 standards

3. Full-Process Quality Control: We implement comprehensive quality control including 100% ultrasonic, eddy current and hydrostatic testing

4. Complete International Certifications: Our products meet all major international standards and hold ASTM, ASME, PED and nuclear certifications

5. Advanced Customization Capability: We can produce custom sizes, lengths, wall thicknesses and end processing according to your drawings

6. Global Power Supply Chain Experience: We have extensive experience supplying to major power companies worldwide with reliable on-time delivery

7. Professional Technical Support: Our team of metallurgical engineers and power industry specialists provides expert guidance on material selection

8. One-Stop Solution: We provide complete solutions from raw material supply to pre-fabricated assemblies, reducing your supply chain complexity

2. Full Material Traceability: Every product has a unique heat number and complete traceability documentation from raw material to finished product

3. Value-Added Processing: We offer precision cutting, CNC bending, welding, end processing and surface finishing services

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 with expedited shipping

6. Market Growth: The global Alloy 800/800H market for power generation is projected to grow at a CAGR of over 5% through 2030, driven by increasing demand for clean energy and nuclear power

7. Sustainability Commitment: All our products are manufactured using sustainable practices and are 100% recyclable

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 to prevent contact damage

4. Wooden Case: Bundles are packed in sturdy fumigated wooden cases with steel reinforcement for international shipping

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