Product Description
Hastelloy C276 Flanges are premium-grade pipe connection components manufactured from Hastelloy C276 (UNS N10276) alloy. C276 is a nickel-molybdenum-chromium superalloy renowned for its exceptional corrosion resistance in the most aggressive chemical environments.
Our Hastelloy C276 flanges deliver reliable performance in extreme conditions, offering superior resistance to pitting, stress corrosion cracking, and oxidizing atmospheres. Designed for critical applications in chemical processing, oil & gas, and power generation industries.
Key Advantages
- Premium Material Selection: Hastelloy C276 alloy with outstanding corrosion resistance and oxidation resistance
- Precision Manufacturing: Advanced CNC machining equipment ensuring exact dimensions and smooth surface finish
- Custom Solutions: Drawing-based customization, non-standard specifications tailored to your exact requirements
- Rigorous Quality Control: Multi-stage inspection processes ensuring every product meets quality standards
- Professional Service: Full technical support throughout your project lifecycle
Chemical Composition
| Element |
Content |
| Nickel (Ni) |
Balance |
| Molybdenum (Mo) |
15.0 – 17.0% |
| Chromium (Cr) |
14.5 – 16.5% |
| Iron (Fe) |
4.0 – 7.0% |
| Tungsten (W) |
3.0 – 4.5% |
| Cobalt (Co) |
≤ 2.5% |
| Manganese (Mn) |
≤ 1.0% |
| Carbon (C) |
≤ 0.01% |
| Vanadium (V) |
≤ 0.35% |
| Silicon (Si) |
≤ 0.08% |
| Phosphorus (P) |
≤ 0.04% |
| Sulfur (S) |
≤ 0.03% |
Mechanical Properties
| Property |
Value |
| Tensile Strength (UTS) |
≥ 690 MPa |
| Yield Strength (0.2% Offset) |
≥ 283 MPa |
| Elongation |
≥ 40% |
| Hardness |
≤ 100 HRB |
Product Specifications
Flange Types
- Weld Neck Flanges
- Slip-On Flanges
- Blind Flanges
- Socket Weld Flanges
- Threaded Flanges
- Lap Joint Flanges
- Orifice Flanges
- Long Weld Neck Flanges
Size Range
- Metric: DN15 – DN600 (1/2″ – 24″)
- Custom sizes available upon request
Pressure Classes
- ANSI Class 150, 300, 600, 900, 1500, 2500
- PN6, PN10, PN16, PN25, PN40, PN64, PN100
- JIS 5K, 10K, 16K, 20K, 30K, 40K
Surface Finishes
- Solution Annealed
- Pickled & Passivated
- Machined Finish
- Electropolished (upon request)
Compliance Standards
- ASTM B564 / ASME SB-564
- ASTM B575 / ASME SB-575
- ANSI B16.5, B16.47 Series A/B
- API 6A, API 605
- EN 1092-1
- JIS B2220
- DIN 2501, DIN 2633
Typical Applications
| Industry |
Applications |
| Chemical Processing |
Reactors, heat exchangers, pressure vessels, distillation columns |
| Oil & Gas |
Offshore platforms, refineries, sour gas service, desulfurization units |
| Power Generation |
FGD systems, scrubbers, nuclear fuel reprocessing |
| Pulp & Paper |
Chlorine dioxide bleaching equipment, digesters |
| Pharmaceutical |
Process vessels, sterile piping systems |
| Waste Treatment |
Incinerators, pollution control equipment |
| Marine |
Seawater cooling systems, desalination plants |
Special Application Guide
- Severe Corrosive Environments: C276 outperforms standard stainless steels in oxidizing and reducing conditions
- Chloride-Containing Media: Exceptional resistance to chloride-induced pitting and stress corrosion cracking
- Mixed Acids: Superior performance in sulfuric acid, hydrochloric acid, phosphoric acid, and mixed acid environments
- High-Temperature Service: Suitable for continuous operation up to 677°C (1250°F)
Our Service Capabilities
| Service |
Description |
| Drawing Customization |
Custom manufacturing based on your drawings and samples |
| Process Optimization |
Scientific manufacturing processes with precision engineering |
| Quality Management |
Strict inspection with full traceability |
| Efficient Delivery |
Optimized production scheduling with on-time delivery |
| After-Sales Support |
Professional team with rapid response |
Quality Assurance
✓ Material Test Certificate (MTC) with full chemical & mechanical data
✓ PMI (Positive Material Identification) testing
✓ Hydrostatic testing available
✓ Third-party inspection (SGS / TÜV / BV / DNV)
✓ Full traceability with heat number marking
✓ NDE testing (UT / PT / RT) upon request
Packaging & Shipping
- Protective wrapping with VCI film to prevent corrosion
- Custom wooden crating for sea freight
- Marking per customer specifications
- Stock items: 7-10 business days
- Custom production: 20-35 business days
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