UNS N06455 (Hastelloy C-4)
Generic Name & Other Designation
Hastelloy C-4®, Alloy C-4, Nickel Alloy C-4, W.Nr. 2.4610, NiMo16Cr16Ti, NC16Fe17Mo
Product Overview
UNS N06455 (Alloy C-4) is a nickel-chromium-molybdenum superalloy engineered for high thermal stability. By controlling carbon and silicon content and utilizing titanium stabilization, UNS N06455 prevents the precipitation of grain-boundary phases in the heat-affected zone of welds and during high-temperature thermal exposure.
It provides reliable performance in chemical processing environments containing mineral acids, chloride compounds, and organic acids at elevated temperatures.
Key Highlights
✅ High Thermal Stability: Resists precipitate formation in the 650°C to 1040°C (1200°F–1900°F) temperature range.
✅ As-Welded Performance: Retains high ductility and corrosion resistance in weld heat-affected zones (HAZ).
✅ Mixed Chemical Protection: Resists hot contaminated mineral acids, solvents, and chlorine-contaminated media.
✅ Ductility Preservation: Maintains high impact strength and formability after prolonged service aging.
Chemical Composition & Physical Properties
Chemical Composition (wt%)
Element | Ni | Cr | Mo | Ti | Fe | Co | C | Si | Mn | P | S |
Min (%) | Bal. | 14.0 | 14.0 | — | — | — | — | — | — | — | — |
Max (%) | (~65.0) | 18.0 | 17.0 | 0.70 | 3.0 | 2.0 | 0.015 | 0.08 | 1.0 | 0.04 | 0.03 |
Physical & Mechanical Properties
Parameter | Value / Standard (Solution Annealed) |
Density | 8.64 g/cm³ |
Melting Range | 1335°C – 1380°C |
Tensile Strength (Rm) | ≥ 690 MPa |
Yield Strength (0.2%, Rp0.2) | ≥ 280 MPa |
Elongation (A5) | ≥ 40% |
Available Forms
Sheets & Plates: Corrosion-resistant vessel linings, reactor plates.
Seamless Pipe: Heat exchanger tubes, chemical transfer lines.
Forged Bar: Precision pump shafts, valve trim, forged flanges.
Fittings: Custom elbows, tees, reducers, and weld necks.
Typical Application Scenarios
Chemical Processing: Hot acetic acid production, fertilizer pickling lines, reaction vessels.
Agrochemical Plants: Pesticide formulation reactors, chlorine handling systems.
Electro-Galvanizing: Pickling equipment and heating coils in steel mills.
Quality Assurance & Testing
Intergranular corrosion tests per ASTM G28 standards.
Ultrasonic, eddy current, and mechanical property verification.
Full certification delivered under EN 10204 3.1 standards.
Supplier Information (BELNADE)
Supplied by BELNADE, a global source for high-temperature and corrosion-resistant alloys. BELNADE offers cut-to-length services, NDT testing, and worldwide delivery tailored to industrial project schedules.
Get in Touch with BELNADE for Quotes and Technical Inquiries
📧 Email: [email protected]
🌐 Website: www.belnade-material.com
💬 Mobile/ WhatsApp: +86 183 6997 5713