Hastelloy C276 UNS N10276 Nickel Alloy Forged Ring, Conforming to ASTM B564, with Full Corrosion Resistance
Hastelloy C276 UNS N10276 Nickel Alloy Forged Ring
Hastelloy C276 (UNS N10276) nickel alloy forged ring is a high-performance corrosion-resistant forged component with excellent resistance to oxidation, reduction, pitting, and crevice corrosion. It performs reliably in strong acids, chloride media, and marine environments. Conforming to standards such as ASTM B564, it offers excellent strength, toughness, and workability, making it suitable for high-pressure and severe corrosive service conditions in chemical, offshore, oil & gas, and environmental industries.
Key Features
- Resistant to strong acids (HCl, H₂SO₄, HNO₃ mixtures) .
- Excellent resistance to pitting and crevice corrosion.
- Outstanding resistance to stress corrosion cracking (SCC) .
- Stable in wet chlorine and hypochlorite environments.
- Excellent oxidation and reduction resistance.
- High structural integrity under pressure.
Typical Applications
- Flue Gas Desulfurization (FGD): Flange & sealing rings for desulfurization equipment.
- Chlor-Alkali & Fluorochemicals: Pressure rings for reactors, evaporators and extraction towers.
- Offshore Oil & Gas: Flange rings for desalination and sour oil pipelines.
- Pressure Vessels: High-temperature high-pressure valve & end forgings.
- Paper & Metallurgy: Corrosion-resistant rings for bleaching & pickling lines.
- Pharmaceutical Equipment: High-purity anti-corrosion flange sealing rings.
Chemical Composition (wt%)
| Element | Ni | Mo | Cr | W | Fe | Co | Mn | C | Si | P | S |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Range | ≥57.0 | 15.0 – 17.0 | 14.5 – 16.5 | 3.0 – 4.5 | 4.0 – 7.0 | ≤ 2.5 | ≤ 1.0 | ≤ 0.01 | ≤ 0.08 | ≤ 0.04 | ≤ 0.03 |
Mechanical Properties (Solution Annealed + Water Quenched per ASTM B564)
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 690 MPa (100 ksi) |
| Yield Strength (Rp0.2) | ≥ 283 MPa (41 ksi) |
| Elongation (A5) | ≥ 40% |
| Density | 8.89 g/cm³ |
| Hardness | ≤ 100 HRB |
| Max Service Temperature | 677°C (1250°F) |
Forging Ring Manufacturing Process
Our Hastelloy C276 rings are produced through a controlled open-die or ring-rolling process from vacuum induction melted (VIM) + electroslag remelted (ESR) billets. The seamless ring rolling technique ensures optimal grain flow orientation along the circumference, enhancing corrosion fatigue resistance and structural reliability. Post-forging heat treatment features solution annealing followed by rapid water quenching to prevent detrimental phase precipitation and achieve the specified corrosion-resistant and mechanical properties.
Quality Assurance
All DINGSCO Hastelloy C276 forging rings undergo rigorous inspection including ultrasonic testing (UT per ASTM A388 ), liquid penetrant inspection (LPI), mechanical property verification per ASTM E8/E21, chemical analysis via OES, and full dimensional inspection with CMM. Complete material certifications and NDT reports are provided with every shipment.
Contact our sales team today for a quotation, detailed datasheet, or to discuss your custom forging ring specifications.
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