Nickel Alloy C-4 rods

Hastelloy C-4丨UNS N6455

Hastelloy C-4, also known as UNS N6455, is a versatile Ni-Cr-Mo alloy renowned for its exceptional resistance to heat-affected zone (HAZ) sensitization. Among the widely used nickel-chromium-molybdenum materials, it boasts the highest microstructural stability, making it a preferred choice for applications where exposure to aggressive chemicals, such as hydrochloric acid, sulfuric acid, and chlorides. This stability ensures that the alloy can be welded without concerns of sensitization. Similar to other nickel alloys, it exhibits ductility, ease of formability, and weldability, along with remarkable resistance to stress corrosion cracking in chloride-rich solutions. Its elevated chromium and molybdenum content enable it to endure both oxidizing and non-oxidizing acids, while also providing resistance against pitting and crevice corrosion in the presence of chlorides and other halides.

Hastelloy C-4 / UNS N6455 / W.Nr 2.4610

Applications of Hastelloy C-4:

Nickel alloy C-4 can be used in various industries, including chemical processing, aerospace, power generation, petrochemical, pharmaceuticals, and marine applications. It suits sulfuric acid, hydrochloric acid, and acetic acid applications, and is commonly used in chemical reactors, heat exchangers, furnace components, and catalyst support grids.

Normal product forms: Sheet, plate, strip, billet, rod, bar, pipe, tube, fittings, forgings, and welding wires.

Specifications/Standard:  ASTM B446, ASME SB446, ASTM B443, ASME SB443, ASTM B564, ASME SB564, ASTM F467, F467M, ASTM F468, F468M, AMS 5666, and BS 3076.

Chemical Composition:

  • Nickel (Ni): 64% (Balance)

  • Chromium (Cr): 14-18%

  • Molybdenum (Mo): 14-17%

  • Iron (Fe): 3%

  • Cobalt (Co): 2% max

  • Manganese (Mn): 1% max

  • Titanium (Ti): 0.7% max

  • Silicon (Si): 0.08% max

  • Phosphorus (P): 0.04% max

  • Sulfur (S): 0.03% max

  • Carbon (C): 0.015% max

Physical Constants and Thermal Properties

  • Density: 8.64 g/cm³

  • Melting Point: 1370°C

  • Thermal Conductivity: Ranges from 8.1-11.7 W/mK

Mechanical Property:

  • Tensile Strength: Approximately 125 ksi

  • Yield Strength: 52 ksi

  • Elongation Capacity: 58%

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