Hastelloy C4 UNS N06455 Nickel Alloy

Hastelloy C4 has exceptional resistance to a variety of chemical process environments, including hot contaminated mineral acids, solvents, chlorine, and chlorine-contaminated media (organic and inorganic, dry chlorine, formic and acetic acids, acetic anhydride, seawater, and brine). The general corrosion resistance of Alloy C276 and Alloy C4 was essentially the same in many corrosive environments, except that in strongly reducing media like hydrochloric acid, Alloy C276 was better; but in highly oxidizing media, the opposite was true, that is, Alloy C4 was better. Alloy C4 offers good corrosion resistance to a wide variety of media including organic acids and acid chloride solutions.

Chemical Composition

Hastelloy C4 Physical Properties

Hastelloy C4 Equivalent Grades

Hastelloy Alloy C4 ASTM Specification

Properties of Nickel Alloy Hastelloy C4

Density

Renowned for Hastelloy C4 properties, the metal stands out with a density of 8.64 g/cm3. Such a figure ensures robustness, stability, and withstands stress excellently. The lower the density, the higher the strength-to-weight ratio will be.

Melting Point

The melting point of Hastelloy C4 is notably high, precisely 1350°C. High melting points signify stronger intermolecular bonds.

Thermal Conductivity

Thermal conductivity, a crucial parameter for Hastelloy C4, is 11.5 W/m·K at 25°C. Essentially, it describes the rate at which this alloy conducts heat. High thermal conductivity materials quickly distribute heat across their surface.

Electrical Resistivity

When focusing on Hastelloy C4, the electrical resistivity stands at 1.15 μohm·m. Thus, it's not a perfect conductor of electricity. However, given its resistivity, it serves well in many corrosive environments.

Modulus of Elasticity

The modulus of elasticity for Hastelloy C4 is 211 GPa. That's quite impressive! Such value indicates the stiffness of the material and its ability to endure and return to its original shape after stress.

Coefficient of Expansion

For Hastelloy C4, the coefficient of thermal expansion is 11.0 μm/m°C at 20-100°C. This signifies how much the alloy will expand or contract per degree change in temperature.

Magnetic Permeability

Hastelloy C4 shows a magnetic permeability of 1.0003 at 200 oersted (15.9 kA/m). Its low magnetic response proves useful in magnetically sensitive applications.

Specific Heat

The specific heat of Hastelloy C4, also known as Hastelloy C4 2.4610, is 427 J/kg·K. In other words, it's the energy required to raise the temperature of one kilogram of the material by one degree Kelvin.

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