Chemical composition, preparation process, physical and mechanical properties—Hastelloy C276

What is the chemical composition of Hastelloy C276?

– Nickel (Ni): Containing approximately 57% nickel, it is the main component of Hastelloy C276 and provides good corrosion resistance and strength.
– Molybdenum (Mo): Contains about 16% molybdenum. The addition of molybdenum can improve the high-temperature strength and corrosion resistance of the alloy.
– Chromium (Cr): Contains approximately 16% chromium. The addition of chromium can enhance the corrosion resistance of the alloy and form a dense oxide layer protective material.
– Iron (Fe): Contains about 5% iron. The addition of iron helps to enhance the alloy’s resistance to stress corrosion cracking.
– Tungsten (W): Contains about 3-4% tungsten. The addition of tungsten can improve the corrosion resistance and wear resistance of the alloy.
– Titanium (Ti) and aluminum (Al): The content is low, about 0.2-0.4% and 0.5-1.0% respectively. The addition of these two elements can effectively improve the corrosion resistance of the alloy.

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What are the steps in the preparation process for Hastelloy C276?

1. Smelting: Smelting various raw materials according to a certain ratio to obtain an alloy liquid melt containing the required chemical composition.
2. Refining: Refining the alloy liquid melt obtained by smelting removes impurities and bad components and improves the purity of the alloy.
3. Forming: The refined alloy liquid melt is formed into the desired product shape through casting, forging, hot pressing, etc.
4. Heat treatment: Perform appropriate heat treatment on the formed alloy to adjust the structure and properties, and improve the strength and corrosion resistance of the alloy.

What are the physical and mechanical properties of Hastelloy C276?

– Density: approximately 8.89 g/cm³, with high density.
– Melting point: approximately 1370-1400°C, with a higher melting point.
– Tensile strength: approximately 690 MPa at room temperature, with high tensile strength.
– Yield strength: approximately 310 MPa at room temperature, with high yield strength.
– Elongation: about 40% at room temperature, with good ductility.
– Hardness: About HRC 20-30, with a certain hardness.

Summary: The above is a summary of the chemical composition, manufacturing process, and physical properties of Hastelloy C276. Follow us for more exciting content in the next issue.