Hastelloy C276 (UNS N10276) Large Diameter Forged Flanges | ASTM B564 Corrosion-Resistant Flanges for Chemical & Oil & Gas Industry
Price:
Negotiable
MOQ:
Negotiable
Delivery Time:
(Sample order) 7 days
Brand:
DINGSCO
Product Description
Hastelloy C276 (UNS N10276) Large Diameter Forged Flanges
ASTM B564 Corrosion-Resistant Flanges for Chemical & Oil & Gas Industry
Our Hastelloy C276 large diameter flanges are manufactured from fully forged ring blanks in accordance with ASTM B564, ensuring superior metallurgical integrity, structural uniformity, and long-term performance in aggressive service environments. As a specialized forging manufacturer, we focus on producing heavy-section, large-diameter nickel alloy flanges for critical industrial systems where failure is not acceptable.
Metallurgical Characteristics of UNS N10276
Hastelloy C276 is a Ni-Cr-Mo-W alloy engineered for exceptional resistance to both oxidizing and reducing media.
Typical Nominal Composition:
- Ni (Balance)
- Cr ~15-17%
- Mo ~15-17%
- W ~3-4%
- Fe ≤ 5%
Key Performance Advantages:
- Outstanding resistance to chloride-induced pitting and crevice corrosion
- Excellent resistance to stress corrosion cracking (SCC)
- Superior performance in wet chlorine, hypochlorite, and mixed acid systems
- Stable microstructure with low carbon content to prevent grain boundary carbide precipitation
Forged structure significantly enhances density and mechanical reliability compared to cast components.
Forging & Manufacturing Process Control
Our large diameter C276 flanges are produced through:
- Vacuum induction melting (VIM) or ESR refined billets (upon request)
- Open-die ring forging to refine grain structure
- Controlled deformation ratio to ensure uniform mechanical properties
- Solution heat treatment with precise temperature control
- CNC precision machining
- 100% dimensional and NDT inspection
This process ensures:
- Refined grain flow following the ring contour
- Elimination of internal porosity
- Improved fatigue resistance
- Enhanced structural integrity under cyclic loading
Dimensional Capability
We manufacture large diameter forged flanges with:
- Outer diameter: up to several meters (custom engineered)
- Heavy wall thickness capability
- ASME B16.5 / ASME B16.47 Series A & B
- Custom non-standard engineering drawings supported
Available Types:
- Weld Neck Flanges
- Slip-On Flanges
- Blind Flanges
- Integral Forged Ring Flanges
Mechanical Properties (Typical)
After solution annealing:
- Tensile Strength: ≥ 690 MPa
- Yield Strength: ≥ 283 MPa
- Elongation: ≥ 40%
Properties may vary depending on section thickness and heat treatment condition.
Quality Assurance & Testing
To meet critical project requirements, we conduct:
- PMI (Positive Material Identification)
- Chemical composition analysis
- Tensile testing
- Hardness testing
- Ultrasonic testing (UT)
- Radiographic testing (RT) if required
- Dimensional verification with calibrated instruments
Full traceability documentation and Mill Test Certificates are provided.
Application Fields
Our Hastelloy C276 forged flanges are engineered for:
- Offshore oil & gas platforms
- Chemical reactors and acid handling systems
- Flue Gas Desulfurization (FGD) units
- High-corrosion marine structures
- Chlor-alkali production lines
- Waste acid recovery systems
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Hunan Dinghan New Material Technology Co., LTD
Location
No. 2319, Building 2, Dongfang Furong Garden, No. 582 Yuanda 1st Road, Hehuayuan Street,Furong District, Changsha, Hunan Province, China.
Contact Person
Julia Wang