<p>Hastelloy C22 and C276 are nickel-chromium-molybdenum alloys with exceptional corrosion resistance and strength. However, they differ in composition and application, making them suited for a variety of situations. Here are the main distinctions between Hastelloy C22 and C276 pipes.</p>
<h3>Composition</h3>
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<li>
<p><strong>Hastelloy C22:</strong></p>
<ul>
<li>Contains more chromium than C276, typically around 20-22%.</li>
<li>Has a slightly higher tungsten content.</li>
<li>Designed with an enhanced resistance to oxidizing environments.</li>
</ul>
</li>
<li>
<p><strong>Hastelloy C276:</strong></p>
<ul>
<li>Has a slightly higher molybdenum content.</li>
<li>Contains more nickel and less chromium compared to C22.</li>
<li>Known for its versatility and effectiveness in reducing environments.</li>
</ul>
</li>
</ol>
<h3>Corrosion Resistance</h3>
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<li>
<p><strong>Hastelloy C22:</strong> Offers better resistance to oxidizing environments such as those containing wet chlorine gas, nitric acid, or ferric acids. It is also highly resistant to crevice corrosion and pitting.</p>
</li>
<li>
<p><strong>Hastelloy C276:</strong> While it also has excellent corrosion resistance, it is particularly noted for its resistance to reducing environments and to acids such as hydrochloric and sulfuric acid.</p>
</li>
</ul>
<h3>Applications</h3>
<ul>
<li>
<p><strong>Hastelloy C22:</strong> Used in applications where resistance to a wide range of corrosive environments is required, including chemical processing, pollution control, and waste treatment.</p>
</li>
<li>
<p><strong>Hastelloy C276:</strong> Often used in industries where exposure to corrosive chemicals is a concern, including chemical processing, petrochemical, and oil and gas industries.</p>
</li>
</ul>
<h3>Mechanical Properties</h3>
<ul>
<li>Both alloys exhibit similar mechanical properties, including high tensile strength and excellent fabricability. However, specific mechanical properties may vary slightly depending on the precise composition and treatment of the material.</li>
</ul>
<h3>Cost</h3>
<ul>
<li>Generally, Hastelloy C22 is more expensive due to its higher chromium content and enhanced resistance to certain types of corrosion.</li>
</ul>
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