Nickel Alloys Grades

The workhorse nickel-chromium-molybdenum alloy. Outstanding resistance to a wide range of corrosive environments combined with high strength up to 980°C. The addition of niobium provides excellent fatigue and thermal-fatigue strength. Widely used in aerospace, marine, nuclear, and chemical processing — wherever both strength and corrosion resistance are critical.

A nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. Designed for superior resistance to both reducing and oxidizing acids, including sulfuric and phosphoric. The copper addition provides excellent resistance to sulfuric acid — a key differentiator from Inconel 625. Widely used in chemical processing, pollution control, and pickling operations.

The most universally corrosion-resistant nickel alloy available. Outstanding resistance to both oxidizing and reducing environments, including hot contaminated mineral acids, strong oxidizers like ferric and cupric chlorides, wet chlorine gas, and hypochlorite solutions. The first-choice alloy for severe chemical processing where multiple corrosive agents are present.

A nickel-copper alloy (≈ 67% Ni, 23% Cu) with exceptional resistance to seawater, hydrofluoric acid, and caustic alkalis. Known for its high strength and toughness across a wide temperature range from cryogenic to 480°C. The classic marine engineering alloy — used in shipbuilding, offshore, and desalination for over 100 years.

Advanced nickel-chromium-molybdenum alloy with superior resistance to oxidizing environments compared to C-276. The higher chromium content (20-22.5%) provides outstanding resistance to ferric chlorides, cupric chlorides, and other oxidizing media that challenge C-276. Excellent weldability with little loss of corrosion resistance in the heat-affected zone. The most versatile of the Hastelloy C-family for complex mixed-acid environments.

Nickel-chromium-iron alloy with excellent oxidation resistance up to 1093°C. The high nickel content (72% min) provides outstanding resistance to caustic alkalis and chloride stress corrosion cracking. One of the most widely used nickel alloys for thermal processing, chemical process equipment, and nuclear applications. Standard material for steam generator tubing in pressurized water reactors.

Nickel-chromium-iron alloy with aluminum addition for exceptional oxidation resistance up to 1260°C. The aluminum forms a tightly adherent oxide layer that provides outstanding resistance to carburization, sulfidation, and metal dusting — critical performance advantages in petrochemical furnace and reformer applications. Superior to Alloy 600 in high-temperature corrosion resistance.

Iron-nickel-chromium alloy engineered for long-term high-temperature service with exceptional creep and rupture strength. 800H (annealed, 0.05-0.10% C) provides controlled grain size for creep resistance up to 815°C. 800HT (fine-grain, Al+Ti enhanced) extends service to 980°C. A more economical alternative to nickel-based superalloys for many petrochemical and power generation applications.

Precipitation-hardenable nickel-chromium alloy with exceptional strength from cryogenic temperatures up to 700°C. The addition of niobium enables age hardening — delivering yield strength of 1034-1241 MPa in the heat-treated condition. The alloy of choice for gas turbine hot sections, aerospace fasteners, and high-pressure oil & gas wellhead components. Combines extreme strength with good corrosion resistance.